Muscles Flashcards
Perctoralis Major
arm adduction. arm flexion @ shoulder. medial rotation @ shoulder
O-Clavicle, sternum, costal cartilage of ribs 1-6
I-intertubercular groove of humerus
Coracobrachialis
Arm flex/ adduction @ shoulder
O- coracoid process of scapula
I- medial, shaft of humerus
Supraspinatus (part of rotator cuff)
Arm abduction @ shoulder
O-supraspinous fossa of scapula
I-greater of humerus
Infraspinatus (part of rotator cuff)
arm lateral rotation @ shoulder
O-infraspinous fossa of scapula
I- greater tubercle of humerus
Teres minor (part of the rotator cuff)
arm lateral rotation @ shoulder
O- Posterior lateral scapula
I- greater tubercle of humerus
Subscapularis (part of rotator cuff)
arm medial rotation @ shoulder
O- subscapular fossa of scapula
I- lesser tubercle of humerus
Teres major
arm adduction. medial rotation. extension @ shoulder.
O- inferior angle of scapula
I- intertubercular groove of humerus
Latissimus dorsi
arm extension. adduction. medial rotation @ shoulder.
O- spinous process of vertebrae T6-sacrum, iliac crest
I- Intertubercular groove of humerus
Deltoid
arm abduction @ shoulder. arm flexion. medial rotation at shoulder. arm extension. lateral rotation @ shoulder
O- Clavicle acromion process, spin of scapula
I- Deltoid tuberosity of humerus
Biceps brachii
long head
short head
forearm flexion @ elbow. arm flexion @ shoulder (long-head)
forearm/ hand supination @ radioulnar joints
O- supraglenoid tubercle of scapula (LH)
O- coracoid process of scapula (SH)
I- radial tuberosity of radius
Brachialis
forearm flexion @ elbow
O- anterior surface of humerus
I- coronoid process of ulna
Brachioradialis
(located forearm in posterior compartment)
forearm flexion @ elbow
O- Lateral supracondylar ridge of humerus
I- styloid process of radius
Triceps brachii
long head
lateral head
short head
arm extension @ shoulder (LH). Forearm extension @ elbow
O- infraglenoid tubercle of scapula (LH)
O-posterior shaft of humerus (LH + MH)
I- olecranon process
Anconeus
forearm extension @ elbow
O- lateral epicondyle of humerus, proximal ulna
I- Olecranon of ulna
Supinator
forearm/ hand supination @ radioulnar joints
O- lateral epicondyle of humerus, proximal ulna
I- proximal shaft of radius
Pronator teres
forearm/ hand pronation @ radioulnar joints
O- medial epicondyle of humerus, coronoid process of ulna
I- lateral surface of midshaft of radius
Pronator quadratus
forearm/hand pronation @ radioulnar joints
O- distal ulna
I- distal radius
Flexor carpi ulnaris
Hand flexion @ wrist. hand addiction @ wrist.
O- medial epicondyle of humerus, proximal posterior ulna
I- pisiform, hamate and 5th metacarpal
Flexor carpi radialis
hand flexion, abduction @ wrist
O- medial epicondyle of humerus
I- 2nd & 3rd metacarpl
Flexor digitorum superficialis
Finger flexion @ interphalangeal joints
(hand flexion @ wrist)
O- medial epicondyle of humerus, coronoid process of ulna, radial shaft
I- middle phalanx of each of 2-5
flexor digitorum profundus
finger flexion @ interphalangeal joints
(hand flexion @ wrist)
O- proximal ulna, coronoid process of ulna, IOM
I- distal phalanx of 2-5
Palmaris longus
hand flexion, adduction @ wrist
O-medial epicondyle of humerus
I- palmar aponeurosis
Extensor carpi ulnaris
hand extension, adduction @ wrist
O- Lateral epicondyle of humerus, proximal posterior ulna.
I- 5th metacarpal
Extensor digiti minimi
Little finger extension @ interphalangeal joints
O- Lateral epicondyle of humerus
I- Phalanges of little finger
Extensor digitorum
finger extension @ interphalangeal joints
hand extension @ wrist
O- lateral epicondyle of humerus
I- Phalanges of each of 2-5 fingers
Extensor carpi radialis (longus & brevis)
Hand extension, abduction @ wrist
O- lateral supracondylar ridge (longus)
O- lateral epicondyle of humerus (brevis)
I- 2nd & 3rd metacrapal
