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, 183 (4123), 425-7

Neurons in Rhesus Monkey Visual Cortex: Systematic Relation Between Time of Origin and Eventual Disposition

Neurons in Rhesus Monkey Visual Cortex: Systematic Relation Between Time of Origin and Eventual Disposition

P Rakic. Science.

Abstract

Autoradiographic evidence after injection of tritiated thymidine indicates that cell position in the laminae of the monkey visual cortex is systematically related to time of cell orgin. The earliest-formed neurons, destined for the deepest stratum, arise at about embryonic day 45, and the last ones, destined for the outermost cell stratum, form at about day 102; cells of intervening layers are generated at intervening times. No neocortical neurons are produced in the last two prenatal months or after birth. Compared to cortical neurons in rodents, those in the monkey arise earlier, and the "inside-out" relation of cell position to time of origin is more rigid.

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