Abstract
In general, two competing but not necessarily mutually exclusive models can explain the mechanisms underlying the often observed recovery of neurological and cognitive function (e.g., limb movement, speech production, language comprehension, perceptual skills) after stroke. One is that recovery essentially reflects resolution of a temporary cessation of function in brain tissue not directly destroyed by the stroke but nevertheless affected via deafferentation and a consequent “diaschisis.” The second is that recovery involves spared brain taking on functions previously performed by damaged brain tissue, for example, the cortical representation of the hand or other damaged sensory—motor regions extends into adjacent tissue, or the uninvolved hemisphere takes on the cognitive capacities of the infarcted side. Thus, the first model emphasizes changes associated with temporarily affected brain, whereas the second accentuates reorganization in noninvolved brain (“plasticity”).
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Deutsch, G., Mountz, J.M. (2000). Neuroimaging Evidence of Diaschisis and Reorganization in Stroke Recovery. In: Christensen, AL., Uzzell, B.P. (eds) International Handbook of Neuropsychological Rehabilitation. Critical Issues in Neuropsychology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-5569-5_3
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