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J Dent Res 49(5): 1111-1117, 1970
© 1970 International and American Associations for Dental Research
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Musculoskeletal Arrangements for Lateral Mandibular Movements in the Rabbit and Rat: Electromyographic and Other Analyses

NORRIS L. O'DELL 1, GORDON L. TODD III 1, and GEORGE R. BERNARD 1

1 Department of Anatomy, Medical College of Georgia, Augusta, Georgia, USA 30902

Electromyography using wire microelectrodes and multichannel recording of the masseter and medial pterygoid muscles demonstrated that in the rabbit, the ipsilateral medial pterygoid muscle actively opposes lateral mandibular movement. In the rat, the ipsilateral medial pterygoid muscle and contralateral masseter muscle oppose the movement. The results correlate with the musculoskeletal arrangements of the two animals.

Submitted on October 10, 1969






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