QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

HOME  |   SEARCH  |   ARCHIVE  |   SUBSCRIBE  |   CONTACT  |   HELP

This Article Full Text (PDF) Submit an eLetter Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Lichtman, J. W. Articles by Frank, E. Search for Related Content PubMed PubMed Citation Articles by Lichtman, J. W. Articles by Frank, E.

 Previous Article  |  Next Article 

Journal of Neuroscience, Vol 4, 1745-1753, Copyright © 1984 by Society for Neuroscience

ARTICLE

Physiological evidence for specificity of synaptic connections between individual sensory and motor neurons in the brachial spinal cord of the bullfrog

JW Lichtman and E Frank

We have studied synaptic connections between individual stretch- sensitive muscle afferents and motoneurons in the brachial spinal cord of bullfrogs. Sensory afferents from a given head of the triceps brachii muscle preferentially innervate motoneurons that project to the same muscle head. This preference is characterized in two ways: each class of sensory axon innervates a greater proportion of corresponding motoneurons than of motoneurons projecting to synergistic or unrelated muscles, and the synaptic potentials in these corresponding motoneurons are motoneurons that project to the same muscle head. This preference is characterized in two ways: each class of sensory axon innervates a greater proportion of corresponding motoneurons than of motoneurons projecting to synergistic or unrelated muscles, and the synaptic potentials in these corresponding motoneurons are of larger amplitude. A novel feature of these experiments is that even the smallest averaged synaptic potential is several times larger than the noise level. These smallest synaptic potentials thus represent the smallest synaptic interaction between a sensory and motor cell, and they could be the physiological correlate of a single sensory bouton on a motoneuronal dendrite.

This article has been cited by other articles:

				Z. Wang, L. Li, M. Goulding, and E. Frank Early Postnatal Development of Reciprocal Ia Inhibition in the Murine Spinal Cord J Neurophysiol, July 1, 2008; 100(1): 185 - 196. [Abstract] [Full Text] [PDF]

				H.-H. Chen, W. G. Tourtellotte, and E. Frank Muscle Spindle-Derived Neurotrophin 3 Regulates Synaptic Connectivity between Muscle Sensory and Motor Neurons J. Neurosci., May 1, 2002; 22(9): 3512 - 3519. [Abstract] [Full Text] [PDF]

Home  |   Search  |   Archive  |   Subscribe  |   Contact  |   Help