TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS

An assemblage of 110 individual tricipital motoneurons has been examined with the aim of determining those factors that predispose certain motoneurons to heteronymous response in post-tetanic potentiation. Motoneurons that respond most readily to homonymous volleys are not those that respond most re...

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Detalles Bibliográficos
Autores principales: Lloyd, David P. C., McIntyre, A. K.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1955
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2147510/
https://www.ncbi.nlm.nih.gov/pubmed/13242764
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author Lloyd, David P. C.
McIntyre, A. K.
author_facet Lloyd, David P. C.
McIntyre, A. K.
author_sort Lloyd, David P. C.
collection PubMed
description An assemblage of 110 individual tricipital motoneurons has been examined with the aim of determining those factors that predispose certain motoneurons to heteronymous response in post-tetanic potentiation. Motoneurons that respond most readily to homonymous volleys are not those that respond most readily to post-tetanically potentiated heteronymous volleys. Hence differences in presynaptic organization rather than differences in mean postsynaptic threshold determine differences in readiness for response. Every motoneuron exhibits a distinct asymmetry in transmitter potentiality of homonymous and heteronymous monosynaptic reflex connections. The range of transmitter potentialities is wide and that of heteronymous connections to some motoneurons is greater than that of homonymous connections to some other motoneurons.
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spelling pubmed-21475102008-04-23 TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS Lloyd, David P. C. McIntyre, A. K. J Gen Physiol Article An assemblage of 110 individual tricipital motoneurons has been examined with the aim of determining those factors that predispose certain motoneurons to heteronymous response in post-tetanic potentiation. Motoneurons that respond most readily to homonymous volleys are not those that respond most readily to post-tetanically potentiated heteronymous volleys. Hence differences in presynaptic organization rather than differences in mean postsynaptic threshold determine differences in readiness for response. Every motoneuron exhibits a distinct asymmetry in transmitter potentiality of homonymous and heteronymous monosynaptic reflex connections. The range of transmitter potentialities is wide and that of heteronymous connections to some motoneurons is greater than that of homonymous connections to some other motoneurons. The Rockefeller University Press 1955-07-20 /pmc/articles/PMC2147510/ /pubmed/13242764 Text en Copyright © Copyright, 1955, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Lloyd, David P. C.
McIntyre, A. K.
TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS
title TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS
title_full TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS
title_fullStr TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS
title_full_unstemmed TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS
title_short TRANSMITTER POTENTIALITY OF HOMONYMOUS AND HETERONYMOUS MONOSYNAPTIC REFLEX CONNECTIONS OF INDIVIDUAL MOTONEURONS
title_sort transmitter potentiality of homonymous and heteronymous monosynaptic reflex connections of individual motoneurons
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2147510/
https://www.ncbi.nlm.nih.gov/pubmed/13242764
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