Electrophysiological Tracings of Intraretinal Optic Nerve Fibers in the Cat

The running course of intraretinal optic nerve fibers was traced on a tangent screen at 1m by plotting centers of receptive fields of units as many as possible recorded at a given electrode position in the cat's retina. Antidromic activation of units by stimulation of either the contralateral o...

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Bibliographic Details
Published inThe Tohoku Journal of Experimental Medicine Vol. 98; no. 3; pp. 215 - 222
Main Authors Ogawa, Tetsuro, Imazawa, Yoshiyuki, Chu, Shingo
Format Journal Article
LanguageEnglish
Published Japan Tohoku University Medical Press 01.01.1969
Subjects
Action Potentials
Animals
Axons - physiology
Body Temperature
Cats
Electric Stimulation
Electrodes
Electrophysiology
Nerve Fibers, Myelinated - physiology
Neural Conduction
Neurons - physiology
Ophthalmoscopy
Optic Nerve - physiology
Retina - innervation
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Summary:The running course of intraretinal optic nerve fibers was traced on a tangent screen at 1m by plotting centers of receptive fields of units as many as possible recorded at a given electrode position in the cat's retina. Antidromic activation of units by stimulation of either the contralateral or ipsilateral optic tract allowed the separation of the contralaterally projecting portion (nasal retina) from the bilaterally projecting portion in the retina. The bilaterally projecting portion includes the vertical median strip of overlap and the temporal retina. Multunit potentials recorded in the retina in response to antidromic stimulation of the optic tract consisted of two separate peaks which indicated the presence of two separate fiber groups in the optic nerve fibers. These peaks correspond to 2.75m/sec and 1.75m./sec in conduction velocity of intraretinal optic nerve fibers.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0040-8727
1349-3329
DOI:10.1620/tjem.98.215