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Journal of Dental Research, Vol 66, 1533-1537, Copyright © 1987 by International & American Associations for Dental Research Online Journals

ARTICLES

The effect of sectioning the trigeminal sensory root on the periodontally-induced jaw-opening reflex

T. G. Collier and J. P. Lund

The experiment was designed to determine the pathway taken to the brain stem by periodontal afferents responsible for the digastric jaw-opening reflex induced by tooth-tapping. Cutting the trigeminal sensory roots of anesthetized decerebrate cats eliminated the ipsilateral periodontally-induced reflex, although the stretch reflexes of the jaw-closing muscles were undiminished. These results suggest that periodontal afferents causing the jaw-opening reflex reach the brainstem through the Vth sensory root, and confirm that muscle spindle afferents travel through the Vth motor root.




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