Wednesday, May 30, 2012

Mild Sensory Stimulation Completely Protects the Adult Rodent Cortex from Ischemic Stroke

The precursor research to this post:
Sensory Stimulation Protects from Stroke Damage in Awake Animals
Someone should make a hypothesis of what sensory stimulation on humans would be equivalent(face, hands,genitals?) to a whisker on a rat. This would be so easy to implement and run research on.
 http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0011270
Despite progress in reducing ischemic stroke damage, complete protection remains elusive. Here we demonstrate that, after permanent occlusion of a major cortical artery (middle cerebral artery; MCA), single whisker stimulation can induce complete protection of the adult rat cortex, but only if administered within a critical time window. Animals that receive early treatment are histologically and behaviorally equivalent to healthy controls and have normal neuronal function. Protection of the cortex clearly requires reperfusion to the ischemic area despite permanent occlusion. Using blood flow imaging and other techniques we found evidence of reversed blood flow into MCA branches from an alternate arterial source via collateral vessels (inter-arterial connections), a potential mechanism for reperfusion. These findings suggest that the cortex is capable of extensive blood flow reorganization and more importantly that mild sensory stimulation can provide complete protection from impending stroke given early intervention. Such non-invasive, non-pharmacological intervention has clear translational potential.
Question; Does the infarct location also include motor cortex? white matter? pre-motor cortex? Just trying to see how massive a stroke was generated. They should have cubic volumes listed someplace.

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