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Definition
| bipartite muscle consisting of the frontal and occipital bellies connected by a cranial aponeurosis, the galea aponeurtotica; the alternate actions of these two muscles pull scalp forward and backward |
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| covers forehead and dome of skull; no bony attachments; raises eyebrows, and wrinkles forehead skin horizontally |
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| overlies posterior occiput; by pulling on the galea fixes origin of frontalis; fixes aponeurosis and pulls scalp posteriorly |
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| small muscle; activity associated with that of the orbicularis oculi; draws eyebrows together and inferiorly; wrinkles skin of forehead vertically (as in frowning) |
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| thin, tripartite sphincter muscle of the eyelid; surounds rim of the orbit; closes eye and produces blinking |
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| zygomaticus-major and minor |
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Definition
| muscle pair extending diagonally from cheekbone to corner of mouth; raises lateral corners of mouth upward (smiling) |
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| slender muscle inferior and lateral to zygomaticus; draws corner of lip laterally; tenses lips |
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| thin muscle between orbicularis oris and inferior eye margin; opens lips |
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| depressor labii inferioris |
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Definition
| small muscle running from mandible to lower lip; draws lower lip into a pout |
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Definition
| complicated, multilayered muscle of the lips with fibers that run in many different directions; most run circularly; closes lips (kissing and whistling muscle) |
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| one of the muscle pair forming a v- shaped muscle mass on chin; wrinkles chin |
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| thin, horizontal cheek muscle; principle muscle of cheek; deep to masseter; compresses cheek as in whistling and sucking |
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Definition
| unpaired, thin, sheetlike superficial neck muscle; not strictly a head muscle, but plays a role in facial expression; tenses skin of neck |
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Definition
| covers lateral aspect of mandibular ramus; can be palpated on forcible closure of jaw; PM of jaw closure; elevates mandible |
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Definition
| fan shaped muscle lying over parts of frontal parietal and temporal bones; closes jaw |
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| runs along internal medial surface of mandible; grinding movements of mouth |
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| superior to medial pterygoid; grinding of teeth |
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| unpaired muscle; thin sheetlike superficial to neck; tenses skin of neck |
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| two headed muscle located deep to the platysma on anterolateral surface of neck; flexion of head forward; rotates head either direction |
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| located more on lateral than anterior neck; deep to platysma and sternocleidomastoid; elevates rib 1 and 2 |
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Definition
| covers upper portion of chest; prime mover of arm flexion; adducts medially; rotates arm |
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Definition
| fan shaped muscle deep to scapula; contracts and holds scapula against chest wall; rotates scapula |
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| shoulder muscle mass; arm abduction |
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