DEVELOPMENTAL-CHANGES IN THE DISTRIBUTION OF ACETYLCHOLINESTERASE IN THE EXTRASTRIATE VISUAL-CORTEX OF THE MONKEY

In the fetal and neonatal monkey, periodically organized regions of hi gh activity of acetylcholinesterase were found in the visual cortical area V2 (Area 18). The acetylcholinesterase bands, like the thin and t hick stripes of cytochrome oxidase, were found to run orthogonal to th e area 17/18 border. During neonatal development these bands progressi vely narrow and finally disappear shortly after four months of age.