Displaced ganglion cells in carp retina revealed by the horseradish peroxidase technique

Abstract

Displaced ganglion cells were identified in the carp retina by the retrograde axonal transport of horseradish peroxidase injected into the optic tectum. Cells in the ganglion cell layer were all labelled, while in the amacrine cell layer only 1/4000 cells were labelled. Because of such low population, it is unlikely to penetrate displaced ganglion cells by microelectrodes. The present finding suggests that the spiking cells frequently recorded in the inner nuclear layer are genuine amacrine cells.