Visual direction-selective neurons in the pretectum of the rainbow trout

Brain Research Bulletin
Matthias Klar, K-P Hoffmann

Abstract

In mammals, the essential neuronal substrate for the generation of the horizontal optokinetic nystagmus (hOKN) are the nucleus of optical tract (NOT) and the dorsal terminal nucleus (DTN). The medial terminal nucleus (MTN) is thought to be involved in vertical OKN control. Characteristic for all of these neurons is a high-direction selectivity. Although behavioural hOKN experiments in different fish species show comparability to mammals, little is known about the neuronal OKN control in fish. In preceding studies, we demonstrated that the rainbow trout has a nearly symmetrical monocular hOKN at low stimulus speeds. With increasing visual stimulus speeds (>14 degrees /s), the monocular hOKN becomes asymmetrical with a temporo to nasal preferred direction. For visual stimulation, we presented random-dot-patterns projected by a planetarium inside a perimeter. We tested four rotation axes of the planetarium, yaw (0 degrees -180 degrees ), roll (90 degrees -270 degrees ), diagonal (45 degrees -225 degrees ) and anti-diagonal (135 degrees -315 degrees ). In every position, the visual stimulus turned in clockwise and counter-clockwise direction. In a subregion of the pretectum of nine fish, we recorded 47 direction-selective neurons. ...Continue Reading

Citations

Sep 8, 2007·Visual Neuroscience·Martin Gehres, Christa Neumeyer
Aug 4, 2009·Annals of the New York Academy of Sciences·Olivia Andrea Masseck, Klaus-Peter Hoffmann
Jan 7, 2010·Brain Research·Michael G MetzenMichael H Hofmann
Sep 10, 2005·Brain Research·Carlos Mora-FerrerKarin Jürgens
Feb 1, 2008·Vision Research·Olivia MasseckKlaus-Peter Hoffmann
Oct 18, 2014·Frontiers in Neural Circuits·Orsola Rosa SalvaGiorgio Vallortigara
Apr 30, 2013·Journal of Integrative Neuroscience·Igor I Pushchin
Aug 28, 2009·Journal of Neurophysiology·Olivia Andrea Masseck, Klaus-Peter Hoffmann
Nov 6, 2007·Journal of Neurophysiology·Olivia Andrea Masseck, Klaus-Peter Hoffmann
Dec 17, 2010·Journal of Neurophysiology·Owen Debowy, Robert Baker
Dec 15, 2019·Scientific Reports·Ting-Feng LinMelody Ying-Yu Huang

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