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Worldwide, cerebrovascular accidents (stroke) are the second leading cause of death and the third leading cause of disability. However, not many the histopathological study of progression in chronic stroke has been published so far. This study  gives the detail explanation of mechanism of recovery and might give the idea of new  timeline when to set up the treatment to regenerate restoration of damaged cells.  Fourteen male Wistar rats (15–20 weeks, weighing 250-400 g) were used in this study. Prior to 7 days of adaptation to the laboratory environment, rats were divided into four groups. Sham group (n=2), rats that sacrificied 4th week (n=2), 8th week (n=5), 12th week(n=5). 90 minutes temporary MCAO procedures were performed using the Indonesian modified technique. CD31 and Doublecortin markers were used to evaluate angiogenesis and neurogenesis. The results showed that ventricle size of ipsilateral brain was not so affected as in week 12th compared to 8th week. Gliosis as a response to damage to the central nervous system was more dense in week 12th as oppose to week 4th. Regarding angiogenesis and neurogenesis, there is significant improvement of angiogenesis and neurogenesis within weeks, however 4th week post MCAO shows prominent recovery. We summarized that rat’s brain shows spontanenous improvement in chronic phase of stroke ischemia and angiogenesis and neurogenesis still happends until week 12th.

A Descriptive Study of Histopathological of Chronic Brain Ischemia of Rat Tissue