Abstract:
:In the present study homonymous and heteronymous projections of muscle spindle afferent fibers in the human jaw-closing system were investigated. Stretch reflex responses were elicited with percutaneous displacement stimuli applied to the belly of the anterior superficial divisions of temporalis and masseter muscles. The distribution of reflex responses in jaw-closing muscles was assessed. Reflex responses to this stimulus were observed in all jaw-closing muscles ipsilateral to the stimulated muscle, suggesting that the projection of spindle afferent fibers to jaw-closing muscles in humans is diffuse. Comparisons of homonymous and heteronymous reflex response amplitudes indicated that homonymous response amplitudes tended to be larger. However, the relative strength of heteronymous inputs to masseter motoneurons appeared to be stronger than those to temporalis motoneurons.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Smith A,Moore CA,Pratt CAdoi
10.1016/0014-4886(85)90070-6subject
Has Abstractpub_date
1985-06-01 00:00:00pages
544-61issue
3eissn
0014-4886issn
1090-2430journal_volume
88pub_type
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journal_title:Experimental neurology
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