PMID: 7544610May 1, 1995Paper

Interlaminar connections of the superior colliculus in the tree shrew. II: Projections from the superficial gray to the optic layer

Visual Neuroscience
P Lee, W C Hall

Abstract

This study of the tree shrew, Tupaia belangeri, provides evidence for an intracollicular pathway that arises in the superficial gray layer and terminates in the optic layer. As a first step, Nissl, myelin, and cytochrome oxidase stains were used to identify the layers of the superior colliculus in the tree shrew. Second, anterograde and retrograde axonal transport methods were used to determine relationships between laminar borders and patterns of connections. Intraocular injections of wheat germ agglutinin conjugated to horseradish peroxidase showed that the border between the superficial gray and optic layers in the tree shrew is marked by a sharp decrease in the density of retinotectal projections. The optic layer also could be distinguished from the subjacent intermediate gray layer by differences in connections. Of the two layers, only the intermediate gray layer received projections following injections of wheat germ agglutinin conjugated to horseradish peroxidase within substantia nigra pars reticulata. Similarly, following injections of horseradish peroxidase or biocytin in the paramedian pons, the intermediate gray but not the optic layer contained labeled cells of origin for the main premotor pathway from the tectum, ...Continue Reading

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Citations

Apr 19, 2002·Progress in Neurobiology·Tadashi Isa, Shigeto Sasaki
Dec 16, 1997·Proceedings of the National Academy of Sciences of the United States of America·P H LeeW C Hall
Aug 28, 2009·Journal of Neurophysiology·Tadashi Isa, William C Hall
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Jan 13, 2006·Biological cybernetics·Alireza S MahaniRalf Wessel
Jul 21, 2005·Experimental Brain Research·Eric TardifStephanie Clarke
Jun 2, 2009·Journal of Chemical Neuroanatomy·A Poveda, R Kretz
Sep 29, 2011·Annals of the New York Academy of Sciences·Corinne R VokounMichele A Basso
Sep 15, 2016·Brain Structure & Function·Jian-Kun DaiHao Lei
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Jun 4, 2004·Journal of Neurophysiology·Yasuhiko Saito, Tadashi Isa
Oct 2, 2002·The Journal of Comparative Neurology·Mary BehanM Alex Meredith
Dec 17, 2004·Journal of Neurophysiology·Yasuhiko Saito, Tadashi Isa
Feb 16, 2018·The Journal of Comparative Neurology·Heywood M Petry, Martha E Bickford
May 23, 2015·Journal of Neurophysiology·Peter O BayguinovMichele A Basso
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Jun 9, 2015·Neuroreport·Josine Verhaal, Harald Luksch
Apr 11, 2003·Journal of Neurophysiology·Mathias Boller, Matthias Schmidt

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