Muscles Flashcards
Action of Rhomboids minor & major
Retract scapula.
Stabilize scapula.
Rotate glenoid cavity downward.
Origin of Rhomboids minor & major
Spinous processes of C7 and T3-T5
Insertion of Rhomboids minor & major
Medial border of scapula.
Innervation of Rhomboids minor & major
Dorsal scapular n.
Action of Pectoralis major
flexes, medial rotate, and abducts arm
Origin of Pectoralis major
clavicle, sternum, ribs 1-6
Insertion of Pectoralis major
Intertabercular groove of humerus
Innervation of Pectoralis major
pectoral n.
Action of Deltoid
Abduct humerus
Action teres major
extend and laterally rotate arm at shoulder joint
Action of Teres minor
Extend and laterally rotate arm at shoulder joint
Action of Supraspinatus
Abduct humerus
action of Infraspinatus
lateral rotate humerus
Action of Triceps brachii
forearm extension
Action of Biceps brachii
Flex elbow, flex shoulder, and supinate forearm
Action of Brachioradialis
Synergist of elbow flexion
Action of Brachialis
Flexor of elbow
Action of Coracobrachialis
Adduction and flexion at shoulder
Origin of Coracobrachialis
Coracoid process (on scapula)
Origin of Brachialis
Anterior distal humerus
Origin of Brachioradialis
Distal humerus
Origin of Biceps brachii
Short head: Coracoid process
Long head: supraglenoid tubercle
Origin of Triceps brachii
Long head: glenoid cavity inferior margin.
Lateral head: posterior humerus.
Medial head: posterior humerus distal radial groove.
Origin of Subscapularis
Subscapular fossa
Origin of Infraspinatus
Infraspinous fossa
Origin of Supraspinatus
Supraspinous fossa
Origin of Teres minor
Lateral border scapula
Origin of Teres major
Posterior surface of Inferior border of scapula
Origin of Deltoid
Clavicle, acromion and spine of scapula
