Abstract：
:Spinal reflex arcs mediated by low threshold afferents between the brachioradialis (BR) and flexor carpi radialis (FCR) were studied in eleven healthy human subjects using a post-stimulus time-histogram method. Electrical conditioning stimuli (ES) to the radial nerve branch innervating BR with the intensity below the motor threshold (MT) induced an early and significant trough (inhibition) in 32/85 FCR motor units (MUs) in 9/9 subjects. Such inhibition was never provoked by cutaneous stimulation. The central synaptic delay (CSD) of the inhibition was approximately 1.1ms longer than that of the homonymous FCR facilitation. ES to the median nerve branch innervating FCR with the intensity below MT induced an inhibition in 27/71 BR-MUs in 10/10 subjects. CSD of the inhibition was about 1.1ms longer than that of the homonymous BR facilitation. These findings suggest that inhibition between BR and FCR exists in humans. Group I afferents seem to mediate the inhibition through an oligo(di or tri)-synaptic path.
journal_name
Neurosci Resjournal_title
Neuroscience researchauthors
Kobayashi S,Hayashi M,Shinozaki K,Nito M,Hashizume W,Miyasaka T,Shindo M,Naito Adoi
10.1016/j.neures.2016.03.001subject
Has Abstractpub_date
2016-09-01 00:00:00pages
37-42eissn
0168-0102issn
1872-8111pii
S0168-0102(16)00063-8journal_volume
110pub_type
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