A Dynamic Nomogram to Predict the Risk of Stroke in Emergency Department Patients With Acute Dizziness

 Then roll this out to all stroke hospitals and get it implemented in each one.

A Dynamic Nomogram to Predict the Risk of Stroke in Emergency Department Patients With Acute Dizziness

Ying Bi and Fei Cao^*

• Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

Objective: To develop a risk prediction tool for acute ischemic stroke (AIS) for patients presenting to the emergency department (ED) with acute dizziness/vertigo or imbalance.

Method: A prospective, multicenter cohort study was designed, and adult patients presenting with dizziness/vertigo or imbalance within 14 days were consecutively enrolled from the EDs of 4 tertiary hospitals between August 10, 2020, and June 10, 2021. Stroke was diagnosed by CT or MRI performed within 14 days of symptom onset. Participants were followed-up for 30 days. The least absolute shrinkage and selection operator (LASSO) logistic regression analysis was conducted to extract predictive factors that best identified patients at high risk of stroke to establish a prediction model. Model discrimination and calibration were assessed and its prediction performance was compared with the age, blood pressure, clinical features, duration, and diabetes (ABCD2) score, nystagmus scheme, and finger to nose test.

Results: In this study, 790 out of 2,360 patients were enrolled {median age, 60.0 years [interquartile range (IQR), 51–68 years]; 354 (44.8%) men}, with complete follow-up data available. AIS was identified in 80 patients. An online web service tool (https://neuroby.shinyapps.io/dynnomapp/) was developed for stroke risk prediction, including the variables of sex, trigger, isolated symptom, nausea, history of brief dizziness, high blood pressure, finger to nose test, and tandem gait test. The model exhibited excellent discrimination with an area under the receiver operating characteristic (ROC) curve (AUC) of 0.889 (95% CI: 0.855–0.923), compared with the ABCD2 score, nystagmus scheme, and finger to nose test [0.712 (95% CI, 0.652–0.771), 0.602 (95% CI, 0.556–0.648), and 61.7 (95% CI, 0.568–0.666) respectively].

Conclusion: Our new prediction model exhibited good performance and could be useful for stroke identification in patients presenting with dizziness, vertigo, or imbalance. Further externally validation study is needed to increase the strength of our findings.

Introduction

It has been established that stroke accounts for 2–13.4% of patients presenting to the emergency department (ED) with dizziness (1–5). Stroke is the second leading cause of death globally and has a limited treatment time window (6–8). Misdiagnosis can affect treatment decision-making, thus seriously impacting disease outcomes and patient quality of life, emphasizing the importance of timely stroke diagnosis in patients with dizziness (9–11). In this respect, it has been shown that over one-third of stroke cases are missed at the first visit by emergency physicians (EPs) (12). The misdiagnosis rate can be as high as 24–60%, especially when the symptoms are mild, non-specific, and transient (13).

Many efforts have been made to differentiate stroke from other causes of dizziness. The age, blood pressure, clinical features, duration, and diabetes (ABCD2) score with an area under the receiver operating characteristic (ROC) curve (AUC) of 0.79, and head impulse, nystagmus pattern, test of skew (HINTS) test with high sensitivity/specificity (100%/96%), are the two most widely acknowledged tools for stroke identification in patients with acute dizziness (14–17). The features of posterior circulation stroke, which had a triple misdiagnosis rate than that of anterior circulation stroke, are not included in ABCD2 score, which could probably decrease its diagnostic accuracy (18–21). Recently, a combination of ABCD2 ≥ 4 and a central pattern of nystagmus has been shown to yield higher sensitivity than the ABCD2 score alone for identifying stroke (22). Notwithstanding that the HINTS is reported to yield good diagnostic performance, studies report their low usage during clinical practice in EDs, as only 30% of EPs agree with the use of HINTS in patients with dizziness, not to mention the usage of head impulse, nystagmus pattern, test of skew, acute hearing loss (HINTS-plus) (23). Truncal ataxia, an easy-to-evaluate test, has been shown to yield high sensitivity to differentiate stroke from acute vestibular syndrome when combined with the nystagmus test (24). Posterior circulation ischemia (PCI) score, TriAGe+ score, STANDING algorithm, and DEFENSIVE scale were recently studied to estimate the risk of stroke in patients with dizziness (25–28). NLR, S100B, and NSE have been reported as new blood markers for the prediction of stroke in patients with dizziness (29–31). However, most of these prediction approaches were developed with small sample sizes, retrospectively collection, no validation, and have not been applied in clinical practice. Early risk stratification of dizzy patients is crucial, and misdiagnosis of stroke can lead to serious complications and poor outcomes. Thus, it is still challenging to discriminate stroke from patients with dizziness in the ED.

The present study sought to develop and validate a clinical prediction model based on easy-to-get predictors to identify patients with dizziness at risk of stroke in the ED.

More at link.

 

Prevalence of acute dizziness and vertigo in cortical stroke

 The more important question to answer is: How do you train emergency room staff to not dismiss theses cases in young adults as drunkenness?

Amy on her 36 hour wait for a diagnosis.

The latest here:

Prevalence of acute dizziness and vertigo in cortical stroke

Yuk Man Chan, Yean Wong, Noorulain Khalid, Stephen Wastling, Andreas Flores-Martin, Lucy-Anne Frank, Nehzat Koohi N, Qadeer Arshad, Indran Davagnanam, Diego Kaski

First published: 11 June 2021

https://doi.org/10.1111/ene.14964

This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi:10.1111/ene.14964

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ABSTRACT

Background

In posterior circulation stroke, vertigo can be a presenting feature. However, whether isolated hemispheric strokes present with vertigo is less clear, despite a few single case-reports in the literature. Here we, a) explored the prevalence of vertigo/dizziness in acute stroke and, b) considered the cortical distribution of these lesions in relation to both the known vestibular cortex and evolution of these symptoms.

Methods

We conducted structured interviews in 173 consecutive unselected patients admitted to the hyperacute stroke unit at the University College London Hospitals. The interview was used to evaluate whether the patient was suffering from dizziness and/or vertigo before the onset of the stroke and at the time of the stroke (acute dizziness/vertigo), and the nature of these symptoms.

Results

112 patients had subcortical lesions and 53 patients had cortical infarcts, of which 21 patients reported acute dizziness. Out of these 21, five patients reported rotational vertigo. 17 of the total 53 patients had lesions in known vestibular cortical areas distributed within the insular and parietal opercular cortices.

Conclusions

The prevalence of vertigo in acute cortical strokes was 9%, with no single locus of lesion overlap. There is growing evidence supporting a lateralised vestibular cortex, with speculation that cortical strokes affecting the right hemisphere, are more likely to cause vestibular symptoms than left-hemispheric strokes. We observed a trend for this association, with the right hemisphere affected in four of five patients who reported spinning vertigo at the onset of the stroke.

 

82% of Hospitalized COVID-19 Patients Had Neurologic Symptoms

You see a doctor immediately and get anti-coagulation going. You don't wait until it gets severe before you see a doctor. I'm going to demand heparin. Don't tough it out at home.

 Heparin binds to cells at a site adjacent to ACE2, the portal for SARS-CoV-2 infection, and "potently" blocks the virus, which could open up therapy options.

Anticoagulation Again Shown to Improve Survival in COVID-19 Patients;-Mortality risk about 50% lower

Stroke occurs frequently in COVID-19, leads to ‘devastating consequences’ for patients

I'm not medically trained so I know nothing, don't listen to me.

The latest here:

82% of Hospitalized COVID-19 Patients Had Neurologic Symptoms

Nearly one-third showed encephalopathy in major U.S. healthcare system

by Judy George, Senior Staff Writer, MedPage Today October 6, 2020

More than 80% of hospitalized COVID-19 patients had neurologic symptoms during their disease course, a retrospective Chicago-area study showed.

Neurologic manifestations were present at COVID-19 onset in 42.2% of 509 consecutive hospitalized COVID-19 patients, at hospitalization in 62.7%, and at anytime during the disease course in 82.3%, reported Igor Koralnik, MD, of Northwestern Medicine in Chicago, and colleagues in the Annals of Clinical and Translational Neurology.

Myalgia (44.8%), headache (37.7%), encephalopathy (31.8%), and dizziness (29.7%) were the most frequent neurologic manifestations, followed by dysgeusia (15.9%) and anosmia (11.4%).

Patients presenting with neurologic symptoms were younger than those who didn't have symptoms. Most patients with neurologic manifestations had a favorable functional outcome at discharge, but encephalopathy -- which affected nearly one in three patients -- was associated with increased morbidity and mortality, independent of respiratory disease severity.

"This is the first study in the U.S. of the prevalence of neuro manifestations in a large population of hospitalized patients," Koralnik told MedPage Today. Only two other papers describing the prevalence of neurological manifestations in hospitalized COVID-19 patients have been published: one based in China, the other in Spain.

Neurological complications of COVID-19 are frequent and in many cases long-lasting, but have not yet received much attention, noted Avindra Nath, MD, senior investigator of nervous systems infections at the NIH National Institute of Neurological Disorders and Stroke, who wasn't involved with the study.

"While it is not unexpected that the sickest patients would have the most neurological complications, it is surprising that these manifestations occur more commonly in younger individuals and is independent of the severity of respiratory involvement," Nath told MedPage Today.

The study's retrospective nature may mean the frequency of neurologic manifestations is underreported, he pointed out.

In their study, Koralnik and colleagues retrospectively analyzed the first 509 consecutive patients admitted with COVID‐19 to the Northwestern Medicine Healthcare system between March 5 and April 6. The Northwestern Medicine system consists of one academic medical center and nine other hospitals in the Chicago area.

COVID‐19 diagnosis was confirmed by SARS‐CoV‐2 reverse transcription‐polymerase chain reaction (RT‐PCR) assay. Encephalopathy was identified by report of altered mental status or depressed level of consciousness, physician-documented diagnosis of encephalopathy or delirium encephalopathy syndrome, or positive Confusion Assessment Method evaluation.

Functional outcome at hospital discharge was based on modified Rankin Scale (mRS), a six-point disability scale in which scores of 0-2 mean a patient can look after his or her own affairs without assistance and 6 represents death.

Patients were age 58.5 on average and 55.2% were men; 134 patients (26.3%) had severe COVID‐19 requiring mechanical ventilation. In total, 419 of the 509 patients had neurologic manifestations at any time during the disease course. Independent risk factors for developing any neurologic manifestation were severe COVID‐19 (OR 4.02, 95% CI 2.04–8.89, P<0.001) and younger age (OR 0.982, 95% CI 0.968–0.996, P=0.014).

Strokes, movement disorders, motor and sensory deficits, ataxia, and seizures were uncommon (0.2 to 1.4% of patients each). Overall, 71.1% of hospitalized COVID-19 patients with neurologic symptoms were discharged with an mRS score of 0-2.

Hospitalized COVID-19 patients with encephalopathy were older than those without (66 vs 55 years, P<0.001), had a shorter time from COVID onset to hospitalization (6 vs 7 days, P=0.014), were more likely to be male, and to have a history of any neurological disorder, cancer, cerebrovascular disease, chronic kidney disease, diabetes, dyslipidemia, heart failure, hypertension, and smoking in assessments without multivariate adjustment.

"Triggers were likely multifactorial, including systemic disease -- multi-organ failure, coagulopathy, inflammation -- or direct infection of the brain by the virus, or post-infectious autoimmune mechanisms," Koralnik said.

Patients with encephalopathy had a median hospital stay of 17 days, while those without encephalopathy stayed a median of 5 days. At hospital discharge, 32.1% of patients with encephalopathy had an mRS score of 0-2, compared with 89.3% of those who did not develop encephalopathy.

Encephalopathy independently was associated with worse functional outcome (OR 0.22, 95% CI 0.11–0.42, P<0.001) and higher mortality within 30 days of hospitalization (21.7% vs 3.2%, P<0.001).

Overall, there was no meaningful difference in COVID-19 severity between patients at the academic medical center and ones at the nine other hospitals, but patients at the academic center had better functional outcomes and lower 30-day mortality.

"It's of concern that the outcome of patients was different in the various hospitals," Nath said. "The authors attribute this to differences in the quality of care provided. This means that hospitalized patients require high level of care which is not available in most places and points to an important vulnerability of our healthcare system."

The study had several limitations, including its retrospective nature and the fact that fewer than 6% of patients were evaluated by neurologists or neurosurgeons. With strict infection control precautions in place, access to brain CT or MRI was limited, the researchers said.

• Judy George covers neurology and neuroscience news for MedPage Today, writing about brain aging, Alzheimer’s, dementia, MS, rare diseases, epilepsy, autism, headache, stroke, Parkinson’s, ALS, concussion, CTE, sleep, pain, and more. Follow

Disclosures

Researchers disclosed no relevant relationships with industry.

Primary Source

Annals of Clinical and Translational Neurology

Source Reference: Liotta, EM, et al "Frequent neurologic manifestations and encephalopathy‐associated morbidity in Covid‐19 patients" Ann Clin Transl Neurol 2020; DOI: 10.1002/acn3.51210.

 

Dizziness and the Acute Vestibular Syndrome at the Emergency Department: A Population-Based Descriptive Study

Is your hospital correctly identifying stroke patients that come in presenting dizziness? You need to know the answer prior to your need for it. In other words; How competent is your ER department? Bad research here since they don't specify the accuracy of the various causes.
http://www.docguide.com/dizziness-and-acute-vestibular-syndrome-emergency-department-population-based-descriptive-study?

Ljunggren M, Persson J, Salzer J; European Neurology 79 (1-2), 5-12 (Nov 2017)

Read/Add Comments | Email This | Print This | PubMed | Get Full Text

BACKGROUND Dizziness is a common occurrence witnessed at emergency departments (EDs). This study aims to describe the epidemiology and management of dizzy patients with and without an acute vestibular syndrome (AVS) in the ED at Umeå University Hospital.
METHODS A total of n = 2,126 ED dizziness visits during 3 years were identified. Data were obtained through retrospective review of medical records. Cases were stratified based on presentation, including AVS and neurological deficits. The outcomes analyzed included cerebrovascular causes of dizziness. A Poisson distribution was assumed when calculating incidence CIs.
RESULTS Dizziness accounted for 2.1% of all ED visits, incidence 477/100,000 inhabitants (95% CI 457-498). Among dizzy patients, 19.2% had an AVS, incidence 92/100,000 inhabitants (95% CI 74-113). Top medical diagnostic groups were otovestibular (15.1%), cardiovascular (8.7%) and neurological diseases (7.7%), including stroke and transitory ischemic attack (4.8%). Cerebrovascular causes of dizziness were more common among those with an AVS (10.0%) vs. those without (3.6%), p <0.01.
CONCLUSION The risk for cerebrovascular causes of dizziness, although low in an unselected cohort, increases with the presence of neurological signs and an AVS. These population-based data may be useful when planning and implementing dizziness and AVS management algorithms at EDs.

Interactive website helps to reduce dizziness

Would this help those cerebellum strokes that have dizziness as a result? Not to be done without your doctors prescription. 

Interactive website helps to reduce dizziness

05 May 2017 Southampton, University of

• Under embargo until 08 May 2017 21:00 GMT

An interactive website developed by health psychology and primary care researchers at the University of Southampton has been shown to reduce dizziness amongst adults aged 50 and above.

Results of a study into the effectiveness of the new Balance Retraining site show patients had significantly lower levels of dizziness symptoms after three and six months than those accessing standard care from their GP. After three months, 40 percent of people using the site reported that they felt 'much better' or 'completely well' - twice as many as in the GP care group.

Dizziness affects nearly one in three people aged over 65 in the UK and is often caused by problems with the vestibular (balance) organ in the inner ear. Patients with 'vestibular dizziness', such as those examined in this study, can suffer severe symptoms, triggered by simple everyday movements like turning over in bed, or looking left and right to cross the road. These symptoms are very disruptive - leading to falls, anxiety, depression and loss of independence.

The recommended treatment is a simple exercise-based therapy called vestibular rehabilitation, which involves nodding and shaking the head. Previous research has shown that patients using this therapy are nearly three times more likely to reduce their dizziness than those who don't. However, very few people who report dizziness to their doctor are referred for this type of treatment, so there is a real need to improve access.

Researchers at the University of Southampton developed Balance Retraining to address this problem and help people with dizziness to carry out vestibular rehabilitation exercises via the Web - using video demonstrations, instructions and personalised feedback and advice.

Lucy Yardley, Professor of Health Psychology at the University of Southampton, says: "Balance Retraining has been designed to be very straightforward to use and provides individuals with information and instruction about techniques they can use to reduce their dizziness. The vestibular rehabilitation exercises are very quick and easy to carry out, and work by encouraging the body's balance system to re-adjust to the movements that trigger dizziness symptoms."

The Balance Retraining study included 296 patients with vestibular-related dizziness. These patients were randomly assigned to either have immediate access to the website, or to continue with usual care from their GP. The complete findings are published in the journal Annals of Family Medicine.

Dr Adam Geraghty, a research psychologist at the University of Southampton added: "Users were very positive about their experiences. They found it easy to use, visually appealing and encouraging. Overall, the results show that Balance Retraining is an effective and appealing method of delivering vestibular rehabilitation to those who need it. They also add to existing evidence that this is a safe and effective means of treating vestibular-related dizziness."

Professor Paul Little, a GP and Professor of Primary Care Research at the University of Southampton said: "Dizziness is both common and disabling and most sufferers don't get access to effective treatment. The Balance Retraining intervention has huge potential to provide effective and easily accessible treatment for a really under-served patient group in primary care."

Balance Retraining is now available for the public to use free of charge and can be visited at: https://balance.lifeguidehealth.org. Alternatively, it can be accessed via The Meniere's Society website http://www.menieres.org..uk/information-and-support/treatment-and-management/vestibular-rehabilitation, or the Vestibular Disorders Association's website http://vestibular.org/diagnosis_treatment.
https://balance.lifeguidehealth.org

Severe dizziness treated with steroid injections into the eardrum

Ask your doctor about this intervention if your stroke left you with this problem. 

Severe dizziness treated with steroid injections into the eardrum 

Injections of steroid into the ear are an effective treatment for a common form of severe dizziness, suggests a new study.
In a new trial, scientists from Imperial College London compared current treatments for Meniere’s disease, which causes debilitating dizzy spells.
They found that injections of the steroid methylprednisolone, through the ear drum, are as effective as the current ‘gold standard’ treatment. The current option is an antibiotic called gentamicin, and is also injected into the ear, where it destroys inner ear cells. The treatment prevents dizziness attacks, but can leave patients with permanent hearing damage.
The new trial, published in the Lancet, found that the steroid injections are as effective as gentamicin, but without the side effects. Patients who received the steroid injections were better at hearing speech clearly, compared to those who received the gentamicin injections.
The researchers are now recommending medics offer the steroid injections to patients before trying gentamicin.
Professor Adolfo Bronstein, lead author on the paper from the Department of Medicine at Imperial, said: “Meniere’s disease causes disabling attacks of dizziness that in some cases can leave people unable to work. However at the moment the only treatment we have for severe cases is a so-called ‘destructive treatment’ that kill cells in the inner ear. Doctors, including ourselves, always assumed steroid injections were less effective than the current treatment, but we were surprised to see they work just as well as gentamicin, but do much less harm.”
Meniere’s disease affects around 30,000 people in the UK, and causes intense attacks of dizziness that last anything from a few minutes to 24 hours. During the attacks a person is usually unable to stand, and suffers from hearing loss, as well as nausea or even vomiting. The condition usually strikes people over 40, though scientists still do not know what triggers the disease. One theory is that the condition causes a build-up of salt and fluid in the inner ear.
This section of the ear, which is closest to the brain, holds equipment crucial to maintaining balance. This equipment constantly communicates with the brain, eyes and limbs to keep us on our feet.
Scientists believe the build-up of pressure can cause tiny leaks of fluid in the inner ear, which can cause the balance equipment to malfunction. The condition can also lead to permanent hearing loss.
There is no cure, although the early stages of the disease can be treated with medication and exercises. Severe cases can be treated with injections of gentamicin. After being injected into the ear, the medicine travels to the inner ear where it destroys the cells responsible for balance, and stops the dizzy spells. Usually only one ear is affected, therefore patients still have a working balance mechanism in their healthy ear, and can re-train their balance with exercises.
However, gentamicin can also destroy hearing cells, and up to one in five patients can be left with permanent hearing loss.
In the latest study, researchers at Imperial gave 60 patients with severe Meniere’s disease either injections of gentamicin or steroids. The patients were on average having more than one dizziness attack a week. They were given two injections of one of the treatments, under local anaesthetic, two weeks apart. Neither the patient nor the researcher knew whether a patient received steroid or the gentamicin.
After a two year period, all patients’ dizziness attacks had reduced by around 90 per cent. However the patients who received the steroid injections had better speech discrimination – the ability to hear words clearly - than those who received gentamicin.
Neither treatments were found to have any other side effects, although the injections of gentamicin often triggered a severe dizziness attack when first administered.
Professor Bronstein added that those who received steroid injections were more likely to need additional jabs to stop their dizzy spells.
“For a patient who lives in a remote location where accessing repeat injections would be difficult, then gentamicin would be an option. However, if a patient is able to receive repeat injections, and is concerned about future hearing loss, the steroid injections may be a better choice.”
Natasha Harrington-Benton, Director of the Meniere’s Society, who funded the research said: “We are pleased to have been able to support this research and are encouraged by the outcome. The trial has led to a better understanding of gentamicin and steroid treatments for Meniere’s disease; giving hope to those affected by this complex condition.”
The research was funded by the Meniere’s Society.

• Full bibliographic informationIntratympanic methylprednisolone versus gentamicin in patients with unilateral Ménière’s disease: a randomised, double-blind, comparative effectiveness trial, M. Patel et al. The Lancet, is published November 15 2016

Ballet dancers' brains adapt to stop them feeling dizzy

If you had a cerebellar stroke your doctor should be using this to fix your balance and dizziness issues. 

Ballet dancers' brains adapt to stop them feeling dizzy

The research suggests that years of training can enable dancers to suppress signals from the balance organs in the inner ear.
The findings, published in the journal Cerebral Cortex, could help to improve treatment for patients with chronic dizziness. Around one in four people experience this condition at some time in their lives.
Normally, the feeling of dizziness stems from the vestibular organs in the inner ear. These fluid-filled chambers sense rotation of the head through tiny hairs that sense the fluid moving. After turning around rapidly, the fluid continues to move, which can make you feel like you’re still spinning.
Ballet dancers can perform multiple pirouettes with little or no feeling of dizziness. The findings show that this feat isn’t just down to spotting, a technique dancers use that involves rapidly moving the head to fix their gaze on the same spot as much as possible.
Researchers at Imperial College London recruited 29 female ballet dancers and, as a comparison group, 20 female rowers whose age and fitness levels matched the dancers’.

Benign paroxysmal positional vertigo (BPPV)

Just in case your doctor immediately used Occams' Razor to blame your stroke for your dizziness. 

Benign paroxysmal positional vertigo (BPPV)

A case study here;
“I was dizzy for over ten years…”

“I was dizzy for over ten years…”

“I was dizzy for over ten years…”

Scientists identify a precise part of the brain that’s associated with our sense of standing upright

Another piece of the puzzle for your doctor to solve. If damaged there what EXACT PROTOCOL will your doctor give you to fully recover? This is a non-negotiable demand.

Scientists identify a precise part of the brain that’s associated with our sense of standing upright

The news release;

Researchers at Johns Hopkins identify area of brain that prevents dizziness

Johns Hopkins researchers say they have pinpointed a site in a highly developed area of the human brain that plays an important role in the subconscious recognition of which way is up and which way is down.
The finding, described online in the journal Cerebral Cortex, may help account for some causes of spatial disorientation and dizziness, researchers say, and could offer targets for treating the feelings of unsteadiness and "floating" people experience when the brain fails to properly integrate input from the body's senses.
Disabling dizziness can be a symptom of damage to the inner ear or other senses such as vision. But in many cases, the problem instead appears to stem from a disruption of the processes in the brain that translate input coming from the inner ears about the pull of gravity and from the eyes about our visual sensations into what is known as upright perception. The human brain has an automatic capacity to know which way is up, even when our heads and bodies are askew. Studies of people in zero-gravity conditions suggest that sensing gravity plays a role in the perception of upright and spatial orientation.
"Our brain has this amazing way of knowing where we are in space, whether we are upright or tilted at an angle, even if it is completely dark and we can't see anything around us," says Amir Kheradmand, a neurology instructor at the Johns Hopkins University School of Medicine who conducted the research. "This study suggests there's a small area of neural tissue in the parietal cortex substantially involved in this ability, giving us a place to start thinking about how we may be able to treat people with disorienting dizziness."
Kheradmand says he and his team focused their attention on the right parietal cortex because studies in stroke victims with balance problems suggested that damage to that part of the brain was centrally involved in upright perception.
The Johns Hopkins team recruited eight healthy subjects for the study and placed each person individually in a dark room, where they were shown lines illuminated on a screen. The researchers instructed the subjects to report the orientation of the lines by rotating a dial to the right, left, or straight.
The subjects then received what is known as trans-cranial magnetic stimulation (TMS), which painlessly and noninvasively delivers electromagnetic currents to precise locations in the brain that can temporarily disrupt the function of the targeted area. TMS is considered safe and is approved by the U.S. Food and Drug Administration to treat some patients with depression by stimulating nerve cells in the region of the brain involved in mood control and depression.
For this part of the experiments, each subject had an electromagnetic coil placed against the scalp in a 2-centimeter wide location across the right parietal lobe, behind the ear. This spot was found initially by mapping a small cortical region of the parietal lobe in one subject. At the identified location, the subjects got 600 electromagnetic pulses over the course of 40 seconds. After each 40-second session, the subjects were again asked to show researchers which way each illuminated line on the screen was oriented. The results wore off quickly and the subjects could again be tested on another day. Ultimately, the researchers found that each subject reported that his or her sense of being upright was skewed in the same way after TMS in the same spot in the parietal cortex, an area called the supramarginal gyrus.
Kheradmand says the study's results raise the possibility that TMS could be used to treat chronic dizziness. "If we can disrupt upright perception in healthy people using TMS, it might also be possible to use TMS to fix dysfunction in the same location in people with dizziness and spatial disorientation," he says.
"It's fascinating that we've gotten to the point that we can show that a subconscious perception can be altered using this simple, noninvasive technique," he adds. "We're excited that this could someday be a key to helping people who have dizziness and spatial disorientation to feel better."
David S. Zee and Adrian Lasker, both of Johns Hopkins, also contributed to this research.

 

Ballet dancers' brains 'adapt to spins'

And if dancers can do this neuroplastically your doctor needs to start a clinical trial for all the cerebellum stroke survivors who experience dizziness and figure out how to stop their dizziness. But that won't occur, give it to your great stroke association to figure out.
BBC article here;

Ballet dancers' brains 'adapt to spins'
The Neurologica blog writing about it here;
Why Isn’t the Spinning Dancer Dizzy?

The abstract and article this is based on is here: 
The Neuroanatomical Correlates of Training-Related Perceptuo-Reflex Uncoupling in Dancers

The Use of Neuroimaging Studies and Neurological Consultation to Evaluate Dizzy Patients in the Emergency Department

And maybe if ER departments had one of these 17 objective tests for stroke this wouldn't be quite such a big concern. 

The Use of Neuroimaging Studies and Neurological Consultation to Evaluate Dizzy Patients in the Emergency Department

Abstract

Background and Purpose:

Dizziness is a frequent reason for neuroimaging and neurological consultation, but little is known

about the utility of either practice. We sought to characterize the patterns and yield of neuroimaging and neurological con-

sultation for dizziness in the emergency department (ED).

Methods:

We retrospectively identified consecutive adults presenting

to an academic ED from 2007 to 2009, with a primary complaint of dizziness, vertigo, or imbalance. Neurologists reviewed medical records to determine clinical characteristics, whether a neuroimaging study (head computed tomography [CT] or brain magnetic resonance imaging [MRI]) or neurology consultation was obtained in the ED, and to identify relevant findings on neuroimaging studies. Two neurologists assigned a final diagnosis for the cause of dizziness. Logistic regression was used to evaluate bivariate and multivariate predictors of neuroimaging and consultation.

Results:

Of 907 dizzy patients (mean age 59

years; 58% women), 321 (35%) had a neuroimaging study (28% CT, 11% MRI, and 4% both) and 180 (20%) had neurological consultation. Serious neurological disease was ultimately diagnosed in 13% of patients with neuroimaging and 21% of patients with neurological consultation, compared to 5% of the overall cohort. Headache and focal neurological deficits were associated with both neuroimaging and neurological consultation, while age≥60 years and prior stroke predicted neuroimaging but not consultation, and positional symptoms predicted consultation but not neuroimaging.

Conclusion:

In a tertiary care ED, neuroimaging and neurological consultation were frequently utilized to evaluate dizzy patients, and their diagnostic yield was substantial.

Introduction

Dizziness is one of the most common triage complaints in the

emergency department (ED), accounting for approximately

3%

of visits.

1

Most cases of acute dizziness or vertigo are related to benign causes, such as peripheral vestibular dysfunction.

1-5

However, a small proportion of cases are due to central causes, particularly posterior fossa strokes, which if missed, could lead to severe disability or death.

1,2,6,7

This general concern for uncommon but serious causes of

dizziness often leads to extensive workups for acutely dizzy

patients in the ED that include neuroimaging studies or

neurological consultation.

8,9

However, little is known about the prevalence or utility of either practice, and there are no published data about the clinical factors that are associated with requests for imaging or consultation. A better understanding of the factors associated with these management decisions and the usefulness of these costly and time-

consuming tests is a necessary step toward improving the

overall efficiency and cost-effectiveness of these evaluations