Morphometric Evidences for Regional Variation in Potential of

SUMMARY: The neural plasticity showing the ability of nervous system to change its structure and function is a well-documentedfact. However regional variation within a CNS structure to undergo plastic changes has been shown by limited studies.Along medial-lateral sequences of parasagittal sections, the molecular layer thickness of primary fissure borderlands in rat c erebellarleft hemisphere was studied to assess the regional difference in plasticibility.Despite the homogeneity of cerebellar histology, this study showed that there is a significant interlobular difference between MLthicknesses of Prf borderlands. In addition, it revealed that the thickness alters in a significant trend within each borderland.The quantitative heterogeneity of cerebellar architecture such as variation of cortical thickness may provide some evidences toshow that different regions of a homogenous cortex, even two adjacent borderlands and areas within them, can have different po tentialsfor plasticity. KEY WORDS: Plasticibility; Molecular layer; Primary fissure; Cerebellum; Rat.