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Dynamics of a long-latency reflex pathway in the monkey

✍ Scribed by P. Bawa; R. B. Stein; W. G. Tatton

Publisher
Springer-Verlag
Year
1979
Tongue
English
Weight
359 KB
Volume
34
Category
Article
ISSN
0340-1200

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✦ Synopsis

Angular wrist displacements in the monkey result in a short-latency (20--25 ms) "reflex" response of motor cortical cells in area 4 and separate peaks of activity in the gross EMG of the stretched muscles. Frequency domain analysis was carried out between (1) wrist position as input and motor cortical neuron response as output, (2) position as input and EMG response as output, and (3) motor cortical neuron response as input and EMG response as output. The results show that the dynamics of primary spindle afferents characterize the dynamics of the pathway to the motor cortex and that of the reflex loop. Results are discussed in terms of "long-loop" reflexes.

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