Summary: Motor Scaling By Viewing Distance of Early Visual Motion Signals
During Smooth Pursuit
HUI-HUI ZHOU, MIN WEI, AND DORA E. ANGELAKI
Department of Neurobiology, Washington University School of Medicine, St. Louis, Missouri 63110
Received 28 June 2002; accepted in final form 17 July 2002
Zhou, Hui-Hui, Min Wei, and Dora E. Angelaki. Motor scaling by
viewing distance of early visual motion signals during smooth pursuit
J Neurophysiol 88: 2880­2885, 2002; 10.1152/jn.00476.2002. The
geometry of gaze stabilization during head translation requires eye
movements to scale proportionally to the inverse of target distance.
Such a scaling has indeed been demonstrated to exist for the transla-
tional vestibuloocular reflex (TVOR), as well as optic flow­selective
translational visuomotor reflexes (e.g., ocular following, OFR). The
similarities in this scaling by a neural estimate of target distance for
both the TVOR and the OFR have been interpreted to suggest that the
two reflexes share common premotor processing. Because the neural
substrates of OFR are partly shared by those for the generation of
pursuit eye movements, we wanted to know if the site of gain
modulation for TVOR and OFR is also part of a major pathway for
pursuit. Thus, in the present studies, we investigated in rhesus mon-

Source: Angelaki, Dora - Department of Anatomy and Neurobiology, Washington University in St. Louis

Collections: Biology and Medicine