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Responses of cat motor cortex neurons to cortico-cortical and somatosensory inputs

Responses of cat motor cortex neurons to cortico-cortical and somatosensory inputs 221 57 57 3 3 D. Herman R. Kang M. MacGillis P. Zarzecki Department of Physiology Queen's University K7L 3N6 Kingston Ontario Canada School of Medicine, Queen's University Kingston Ontario Canada School of Dentistry, University of Toronto Toronto Ontario Canada Summary Intracellular techniques were used to investigate a cortico-cortical path from sensory cortex to motor cortex of cats. Cortico-cortical epsps were evoked in motor cortex neurons by microstimulation of area 3a. Epsps with latencies between 1.2 and 2.4 ms were identified as monosynaptic. These short latency cortico-cortical effects were recorded in layers II through VI of the motor cortex. Neurons with monosynaptic cortico-cortical epsps also received excitatory inputs from forelimb nerves, usually from both muscle and cutaneous afferent fibers. The epsps evoked from forelimb nerves in motor cortex neurons were preceded by neural activity in somatosensory cortex. Time delays between arrival of inputs in sensory cortex and in motor cortex were compared to the latencies of cortico-cortical epsps in the same motor cortex neurons. It was apparent that the timing was appropriate for the identified cortico-cortical path to have relayed some sensory inputs to motor cortex. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experimental Brain Research Springer Journals

Responses of cat motor cortex neurons to cortico-cortical and somatosensory inputs

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References (35)

Publisher
Springer Journals
Copyright
Copyright © 1985 by Springer-Verlag
Subject
Biomedicine; Neurosciences; Neurology
ISSN
0014-4819
eISSN
1432-1106
DOI
10.1007/BF00237846
Publisher site
See Article on Publisher Site

Abstract

221 57 57 3 3 D. Herman R. Kang M. MacGillis P. Zarzecki Department of Physiology Queen's University K7L 3N6 Kingston Ontario Canada School of Medicine, Queen's University Kingston Ontario Canada School of Dentistry, University of Toronto Toronto Ontario Canada Summary Intracellular techniques were used to investigate a cortico-cortical path from sensory cortex to motor cortex of cats. Cortico-cortical epsps were evoked in motor cortex neurons by microstimulation of area 3a. Epsps with latencies between 1.2 and 2.4 ms were identified as monosynaptic. These short latency cortico-cortical effects were recorded in layers II through VI of the motor cortex. Neurons with monosynaptic cortico-cortical epsps also received excitatory inputs from forelimb nerves, usually from both muscle and cutaneous afferent fibers. The epsps evoked from forelimb nerves in motor cortex neurons were preceded by neural activity in somatosensory cortex. Time delays between arrival of inputs in sensory cortex and in motor cortex were compared to the latencies of cortico-cortical epsps in the same motor cortex neurons. It was apparent that the timing was appropriate for the identified cortico-cortical path to have relayed some sensory inputs to motor cortex.

Journal

Experimental Brain Research – Springer Journals

Published: Feb 1, 1985

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