The real question yet to be answered; is my cognitive reserve from all the programming languages I learned in my job or my physical fitness? And how much additional cognitive reserve do I need to prevent cognitive decline as I further age? I'm assuming I wiped out most, if not all of my cognitive reserve from my stroke. Any stroke doctor in the world should be able to answer that simple question every stroke survivor has. Do you ever talk to stroke survivors at all? Not a single stroke doctor or researcher ever has contacted me. Someplace in this research they have to define complexity, hopefully it is objective rather than subjective.
Occupational cognitive complexity in earlier adulthood is associated with brain structure and cognitive health in midlife: The CARDIA study
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Abstract
In line with cognitive reserve theory, higher occupational cognitive complexity is associated with reduced cognitive decline in older adulthood. How and when occupational cognitive complexity first exerts protective effects during the life span remains unclear. We investigated associations between occupational cognitive complexity during early to midadulthood and brain structure and cognition in midlife.Participants were 669 adults from the Coronary Artery Risk Development in Young Adults study (aged 18-30 years at baseline, 52% female, 38% Black). We calculated scores reflecting occupational cognitive complexity using Census Occupation Codes (years 10 and 15) and Occupational Information Network (O*NET) data. At year 25, participants had structural brain magnetic resonance imaging, diffusion tensor imaging, and cognitive testing (Rey Auditory Verbal Learning Test, Digit Symbol Substitution Test, Stroop). In adjusted mixed models, we examined associations between occupational cognitive complexity during early to midadulthood and midlife brain structure, specifically gray matter volume and white matter fractional anisotropy, and cognition in midlife (all outcomes converted to z-scores).Higher occupational cognitive complexity was associated with greater white matter fractional anisotropy (estimate = 0.10, p = .01) but not gray matter volume. Higher occupational cognitive complexity was associated with better Digit Symbol Substitution Test (estimate = 0.13, p < .001) and Stroop (estimate = 0.09, p = .01) performance but not Rey Auditory Verbal Learning Test performance.Occupational cognitive complexity earlier in adulthood is associated with better white matter integrity, processing speed, and executive function in midlife. These associations may capture how occupational cognitive complexity contributes to cognitive reserve. (PsycINFO Database Record
US Department of Veterans Affairs; Rehabilitation Research and Development Service
National Institute on Aging/National Heart, Lung, and Blood Institute
National Institute on Aging; Intramural Research Program
National Heart, Lung, and Blood Institute
National Institute on Aging
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