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Muscle Anatomy Muscles of the Head and Neck Muscle Region Action Buccinator Cephalic/ Mouth Compresses cheeks Orbicularis Cephalic/ Mouth Compresses, purses lips Depresssor anguli oris Cephalic/ Mouth Depresses corner of mouth Zygomaticus Cephalic/ Mouth Draws corner of mouth back and up Orbicularis Cephalic/ orbit Closes eye Frontalis Cephalic/ Scalp Raises eyebrows, wrinkle forehead Occipitalis Cephalic/ Scalp Tenses and retracts scalp Masseter (10) Mandible Elevates mandible Pterygoids Cephalic/ Mandible Elevates, protracts and/or moves mandible to either side Muscle Anatomy Muscles of the Head and Neck Temporalis Cephalic/ Mandible Elevates mandible Platysma Cervical Tenses skin of neck, depresses mandible Digastric (7) Cervical Depresses mandible and/or elevates larynx Mylohyoid (11) Cervical Elevates floor of mouth and hyoid, and/or depresses mandible Sternohyoid (17) Cervical Depresses hyoid bone and larynx Sternothyroid Cervical Depresses hyoid bone and larynx Stylohyoid Cervical Elevates larynx Sternocleidomastoid (18) (sternomastoid)(cleidomastoid-6) Cervical Together- flex the neck Alone- bends head toward shoulder and rotates head Clavotrapezius (cat)(5) Cervical/ Shoulder Clavobrachialis (cat)(4) Shoulder Muscle Anatomy Muscles of the Head and Neck Anterior view (human), Ventral view (cat)
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