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  • Title: Lateral asymmetry of H-reflex recovery curves in cat: evidence for a spinal motor asymmetry.
    Author: Tan U.
    Journal: Int J Neurosci; 1984 Aug; 24(1):45-52. PubMed ID: 6480251.
    Abstract:
    Recovery curve of the Hoffmann reflex from the left and right sides was studied in lightly anesthetized cats before and after spinalization. According to the differences in the H-reflex recovery curves from the left and right lateral gastrocnemiussoleus nerves, three populations of intact animals were found: right dominant with higher recovery curve on the right side (31.8%), left dominant with higher recovery curve on the left side (36.4%), and ambilateral with no dominance (31.8%). After spinalization the dominance remained the same in the two first groups and dominance appeared in 5 out of the 7 cats of the last group. These results provide evidence for a bilateral asymmetry of alpha motoneuron excitability in cats, which can be used as a model to study the possible mechanisms of spinal motor asymmetry.
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