Extrinsic and Intrinsic Musculature

Extrinsic and Intrinsic Musculature - 1. Extrinsic Muscle...

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1. Extrinsic Muscle 1. 2. 3. SUPRAHYOID MUSCLES (ELEVATORS) 1. Digastricus Muscle Anterior Belly (Draws up and forward) 1. Origin: posterior mental symphysis of mandible 2. Attaches to Digastricus Muscle Posterior Belly through Intermediate tendon of the hyoid bone 2. Digastricus Muscle Posterior Belly (Draws up and backward) 1. Origin: mastoid process of temporal bone 2. Attaches to Digastricus Muscle Anterior Belly through Intermediate tendon of the hyoid bone 3. Mylohyoid Muscle 1. most of the floor of the mouth 4. Stylohyoid Muscle (Superficial to digastricus posterior belly) 1. Origin: styloid process of temporal bone 2. Insertion: Corpus of Hyoid bone 3. Moves hyoid bone posteriorly 5. Geniohyoid Muscle (genio=chin) 1. Origin: inner surface of mandible at the mental spines 2. Insertion: Corpus of the Hyoid bone 3. Elevates Hyoid bone and depresses the mandible (gives wide excursion {opening mouth} for phonation, important for vowels) 6. Hypoglossus Muscle 1. 2. Insertion: Lateral sides of the tongue
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This note was uploaded on 01/17/2012 for the course SPTH 3306 taught by Professor Adams during the Fall '11 term at University of Central Arkansas.

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Extrinsic and Intrinsic Musculature - 1. Extrinsic Muscle...

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