Because we have no stroke strategy due to our fucking failures of stroke associations. Survivors shouldn't have to figure out everything about their recovery, but right now you do because laziness and maybe stupidity.
http://cshperspectives.cshlp.org/content/7/11/a019034.short
Abstract
A bulk of experimental evidence supports
the idea that the stroke-damaged adult brain makes an attempt to repair
itself by
producing new neurons also in areas where
neurogenesis does not normally occur (e.g., the striatum and cerebral
cortex). Knowledge
about mechanisms regulating the different steps of
neurogenesis after stroke is rapidly increasing but still incomplete.
The
functional consequences of stroke-induced
neurogenesis and the level of integration of the new neurons into
existing neural
circuitries are poorly understood. To have a
substantial impact on the recovery after stroke, this potential
mechanism for
self-repair needs to be enhanced, primarily by
increasing the survival and differentiation of the generated
neuroblasts. Moreover,
for efficient repair, optimization of neurogenesis
most likely needs to be combined with promotion of other endogenous
neuroregenerative
responses (e.g., protection and sprouting of
remaining mature neurons, transplantation of neural stem/progenitor
cells [NSPC]–derived
neurons and glia cells, and modulation of
inflammation).
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