Visual Neuroscience



ON direction-selective ganglion cells in the rabbit retina: Dendritic morphology and pattern of fasciculation


SHIGANG  HE a1 and RICHARD H.  MASLAND a1c1
a1 Howard Hughes Medical Institute, Massachusetts General Hospital, Boston

Abstract

ON direction-selective (DS) ganglion cells were identified by electrophysiological recordings in DAPI labeled, isolated rabbit retinas. Their responses to a flashing spot were sustained. Their responses to moving stimuli were strong in the preferred direction and weak in the null direction. Injection of the recorded cells with Lucifer yellow revealed that the cells had a distinct dendritic morphology, consistent with that described previously (Buhl & Peichl, 1986; Amthor et al., 1989; Famiglietti, 1992a). When neighboring cells were injected, an extensive dendritic co-fasciculation was observed. The pattern of fasciculation restricts the possible synaptic connections of the ON DS cell.

(Received August 12 1997)
(Accepted September 30 1997)


Key Words: Electrophysiology; Motion; Injection.

Correspondence:
c1 Reprint requests to: Richard H. Masland, Wellman 429, Massachusetts General Hospital, Boston, MA 02114, USA.