Muscle Lab 4 - Origin, Insertion, Action (1) Flashcards
Infraspinatus
O - scapula
I - humerus
A - abduct and rotate humerus
Supraspinatus
O - scapula
I - humerus
A - extend humerus
Splenius
O - thoracic vertebrae
I - occipital/parietal bone
A - elevate head
Rhomboideus muscles
O - Occipital (capitis) thoracic and cervical vertebrae
I - scapula
A - adduct scapula; draw scapula cranially
Teres major
O - scapula
I - humerus
A - flex shoulder; retract humerus
Dorsoepitrochlearis
O - latissimus dorsi and tires major
I - ulna
A - extend elbow
Triceps, long head
O - scapula
I - ulna
A - extend elbow
Triceps, lateral head
O - humerus
I - ulna
A - extend elbow
Brachialis
O - humerus
I - ulna
A - flex elbow
Extensor digitorum communis and lateralis
O - humerus
I - phalanges
A - extend digits
Extensor carpi radialis longus and brevis
O - humerus
I - metacarpals
A - extend wrist
Brachioradialis
O - humerus
I - radius
A - supinates manus
Extensor carpi ulnaris
O - humerus and ulna
I - metacarpals
A - flex wirst; rotate wrist laterally
