Directional modulation of visual responses of pretectal neurons by accessory optic neurons in pigeons

Neuroscience
Y GuS R Wang

Abstract

The nucleus lentiformis mesencephali and the nucleus of the basal optic root in birds, homologous to the nucleus of the optic tract and the terminal nuclei of the accessory optic tract in mammals, are involved in optokinetic nystagmus. The present study provides the first electrophysiological evidence that reversible blockade of the pigeon nucleus of the basal optic root by lidocaine can change visual responsiveness of pretectal neurons in a direction-dependent manner. Thirty pretectal cells examined were classified as unidirectional (80%), bidirectional (10%) and omnidirectional (10%) cells according to their directional selectivity. Among the unidirectional cells, seven cells changed firing rates in all directions of motion, 11 changed visual responses only in the preferred directions and six others did not change their responsiveness during lidocaine. Most of the bidirectional cells changed firing rates in the temporonasal direction, and two-thirds of the omnidirectional cells showed these changes in all directions. Thirteen lidocaine administration sites were marked within the nucleus of the basal optic root and 19 recording sites were marked within the nucleus lentiformis mesencephali. This histological verification indica...Continue Reading

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Citations

Mar 14, 2002·Journal of Neuroscience Research·Yong GuShu-Rong Wang
May 11, 2004·Nature Neuroscience·Juergen Haag, Alexander Borst
Mar 5, 2004·American Journal of Therapeutics·Douglas V BrownRobert Barkin
Apr 13, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Thomas E HazyRandall C O'reilly
Jul 1, 2011·Neurosurgery·Faisal A Al-OtaibiAndres M Lozano
Nov 30, 2007·Medicine and Science in Sports and Exercise·Alberto Mendez-VillanuevaDavid Bishop
Jan 17, 2009·Reviews in the Neurosciences·Suzan Dziennis, Nabil J Alkayed
Oct 14, 2006·The Journal of Physiology·Yu-Qiong NiuShu-Rong Wang
Mar 4, 2003·Journal of Neurophysiology·Nathan A CrowderDouglas R W Wylie
Jan 5, 2006·The Journal of Experimental Biology·Monique MauriceAnick Abourachid

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