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8 Cards in this Set
- Front
- Back
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What muscles are involved in protrusion of the mouth?
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Lateral pterygoid assisted by medial pterygoid
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What muscles are involved in retraction of the mouth?
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Posterior fibers of temporalis, deep part of masseter, geniohyoid, digastric
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What muscles are involved in elevation of the mandible?
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Temporalis, masseter, medial pterygoid
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What muscles are involved in depression of the mandible?
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Diagastric, geniohyoid, mylohyoid
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Superficial fibers of the masseter contribute to (protrusion/retrusion) and deep fibers of the masseter contribute to (protrusion/retrusion).
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superficial - protrusion
deep - retrusion |
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What do the fibers of the medial pterygoid course in the same direction as?
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masseter
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What does unilateral contraction of the medial pterygoid produce? lateral pterygoid?
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contralateral excursion
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What is unusual about the lateral pterygoid's contraction?
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it contracts by lengthening
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