DISTRIBUTION OF CYTOCHROME-OXIDASE IN LAYER-IV AND LAYER-V OF THE STRIATE CORTEX IN NEONATE MONKEYS

The uniformly dense staining for cytochrome oxidase (CO) in layer IV o f area 17 in adult monkeys has been described as developing from a bil aminar pattern in neonates being composed of a broad CO band in layer IValpha and a narrow CO band attributed to the innermost zone of layer IVbeta. Here we present evidence, in the neonate marmoset monkey, for the narrow CO band to be localized in the outermost rim of layer V, d esignated as sublayer Va.