Set 2 Muscles Face, Head, and Neck
zygomaticus (major and minor) cranial aponeurosis Epicranius frontalis temporalis orbicularis oculi occipitalis zygomaticus (major and minor) buccinator masseter orbicularis oris sternocleidomastoid depressor anguli oris Platysma
Sternocleidomastoid
Sternocleidomastoid: cleidomastoideus (clavicular head) Origin: Insertion: Action: Upper surface of clavicle (medial 3rd) Mastoid process (temporal bone) Pulls head from side to side and toward chest (½ yes); “prayer muscle”
Sternocleidomastoid: sterno-mastoid (sternal head) Origin: Insertion: Action: Manubrium (sternum) Mastoid process (temporal bone) Pulls head from side to side and toward chest (½ yes); “prayer muscle”
Platysma
Platysma Origin: Insertion: Action: Fascia in upper chest (over pectoralis and deltoids) Lower border of mandible Draws mouth downward; look of surprise