Anatomy and Cell Biology 2221 Study Guide - Midterm Guide: Hamstring, Ulna, Xiphoid Process
9 Dec 2016
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Action: draws angle of mouth superiorly and laterally (smiling) Origin: medial end of arch of frontal bone. Origin: alveolar process of maxilla and mandible. Action: presses cheeks against teeth (ie. whistling) Origin: muscle fibres surrounding opening of mouth. Action: closes/protrudes lips; compresses lips against teeth; shapes lips. Action: flexes head from side to side; rotates head. Action: draws angle of mouth laterally; grimacing. Origin: fascia over deltoid + pec major. Action: draws outer part of lower lop inferiorly + posteriorly (shavers muscle) Action: elevates hyoid, draws it posteriorly, (mstication) Origin: root of orbit (lesser wing of sphenoid bone) Origin: anterior belly form inner side of mandible; posterior belly from temporal bone. Insertion: body of hyoid bone via intermediate tendon. Action: moves superiorly, laterally and rotates laterally. Origin: medial surface of pterygoid process of sphenoid and maxilla. Action: elevates & protracts mandible and side to side chewing. Origin: greater wing and pterygoid process of sphenoid.
