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Journal of Dental Research
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The Effect of Sectioning the Trigeminal Sensory Root on the Periodontally-induced Jaw-opening Reflex

T.G. Collier

Centre de recherche en sciences neurologiques, and Faculté de médecine dentaire, Université de Montreal, Montreal, Québec, Canada H3C 3J7

J.P. Lund

Centre de recherche en sciences neurologiques, and Faculté de médecine dentaire, Université de Montreal, Montreal, Québec, Canada H3C 3J7

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.

Journal of Dental Research, Vol. 66, No. 10, 1533-1537 (1987)
DOI: 10.1177/00220345870660100401
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J.P. Lund
Mastication and its Control by the Brain Stem
Critical Reviews in Oral Biology & Medicine, January 1, 1991; 2(1): 33 - 64.
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