| Direction selectivity in the goldfish tectum revisited. | |
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MedLine Citation:
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PMID: 16154933 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Responses of direction-selective (DS) ganglion cells (GCs) were recorded extracellularly from their axon terminals in the superficial layer of the tectum opticum (TO) of immobilized goldfish, Carassius auratus gibelio (Bloch). Directional tuning curves were measured with contrast edges moving in 12 or more different directions across the receptive field (RF). All directional tuning curves had cardioid-like appearance, their acceptance angles amounted to somewhat more than 180 degrees . According to their preferred directions DS GCs proved to comprise three distinct groups, each group containing DS GCs of ON and OFF subtypes approximately in equal quantity. Thus, this gives six physiological types of DS GCs in total. The preferred direction of a DS GC does not depend to some extent on a value of contrast, speed, size, and form of the stimuli. Coincidence in number of preferred directions with number of semicircular canals implies that DS GCs projecting to tectum are involved in some multimodal sensory integration in postural, locomotor, and oculomotor control in the three-dimensional aquatic world. DS neurons of the TO itself respond independently of the sign of stimulus contrast, have enormous receptive fields, and seem likely to collect signals from the retinal DS units of both ON and OFF subtypes with the same preferred direction. |
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Authors:
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Vadim Maximov; Elena Maximova; Paul Maximov |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Annals of the New York Academy of Sciences Volume: 1048 ISSN: 0077-8923 ISO Abbreviation: Ann. N. Y. Acad. Sci. Publication Date: 2005 Jun |
Date Detail:
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Created Date: 2005-09-12 Completed Date: 2006-07-19 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7506858 Medline TA: Ann N Y Acad Sci Country: United States |
Other Details:
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Languages: eng Pagination: 198-205 Citation Subset: IM |
Affiliation:
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Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow. maximov@iitp.ru |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Action Potentials
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physiology Animals Axons / metabolism Electrophysiology Goldfish Models, Neurological Neural Inhibition / physiology Neurons / physiology* Retinal Ganglion Cells / physiology* Superior Colliculi / cytology, physiology* Synaptic Transmission / physiology* Visual Pathways / physiology* |
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