Origins, Insertions & Actions Flashcards
masseter origin
zygomatic arch
masseter insertions
lateral ramus and angle of mandible
masseter action
elevates mandible
sternocleidomastoid origins
manubrium of sternum and sternal end of clavicle
sternocleidomastoid insertions
mastoid process, temporal, superior nuchal line, occipital
sternocleidomastoid action
lateral rotation of the neck
pectoralis major origins
ribs 2-6, body of sternum, sternal end of clavicle
pectoralis major insertion
intertubercular groove of the humerus
pectoralis major action
adducts arm
deltoid origin
acromial end of clavicle and acromion and spine of scapula
deltoid insertion
deltoid tuberosity of humerus
deltoid action
rotates shoulder
coracobrachialis origin
coracoid process of scapula
coracobrachialis insertion
midshaft of humerus
coracobrachialis action
flexes arm
brachialis origin
anterior shaft of humerus
brachialis insertion
coronoid process of ulna
brachialis action
flexes elbow