Muscles Of The Arm Flashcards
Trapezius *
Origin: posterior occipital bone
Insertion: clavicle
Action: extends and abducts head
Deltoid *
Origin: clavicle
Insertion: deltoid tuberosity of the humerus
Action: abducts arm; flexes, extends, medically and laterally rotates the arm
Pectoralis major *
Origin: clavicle
Insertion: crest of greater tubercle of humerus
Action: flexes, abducts and medially rotates arm
Pectoralis minor
Action: depresses Glenoid cavity
Synergist: pectoralis major
Latissimus dorsi *
Origin: crest of ilium
Insertion: intertubercular groove of humerus
Action: extends, abducts and medially rotates the arm, draws shoulder inferiorly
Supraspinatus
Action: abducts arm
Infraspinatus
Action: laterally rotates arm
Subscapularis
Action: medically rotates arm
Teres minor
Action: laterally rotates and abducts arm
Teres major
Action: extends, abducts, and medically rotates arm
Biceps brachii *
Origin:
- Superior margin of glenoid fossa
- Coracoid process of scapula
Insertion: radial tuberosity
Actions: flexes arm and forearm, supinates hand
Triceps brachii *
Origin: infraglenoid tuberosity of scapula
Insertion: tuberosity of ulna
Actions: extends and abducts arm and extends forearm
Coracobrachialis
Action: flexes and abducts arm
Brachialis
Action: flexes forearm
Brachioradialis
Action: flexes forearm
Supinator*
Origin: lateral epicondyle of humerus
Insertion: proximal radius
Action: supinate hand
Pronator teres *
Origin: medial eoicondyle of humerus
Insertion: lateral, middle shaft of radius
Action: probate hand, flex forearm
Pronator quadratus
Action: pronates hand
Flexor Capri radialis
Action: flexes and abducts hand
Palmaris longus *
Origin: medial epicondyle of humerus
Insertion: palmar aponeurosis
Action: flexes hand
Flexor carpi ulnaris
Action: flexes and abducts hand
Flexor digitorm superficialis *
Origin: medial epicondyle of humerus
Insertion: middle phalanges 2-5
Action: flexes hand and proximal and middle phalanges
Flexor digitorm profundas
Action: flexes hand and phalanges
Flexor pollicis longus
Action: flexes thumb
Extensor carpi ulnaris
Action: extends and abducts hand
Extensor digiti minimi
Action: extends the wrist
Extensor carpi radialis longus
Action: extends and abducts hand
Extensor carpi radialis brevis
Action: extends and abducts hand
Extensor digitorum *
Origin: lateral epicondyle of humerus
Insertion: middle and distal phalanges 2-5
Action: extends phalanges and hand
Extensor pollicis longus
Action: extends thumb
Extensor pollicis brevis
Action: extends thumb
Abductor pollicis longus
Action: abducts thumb
Extensor indicis
Action: extends 2nd digit
Flexor digiti minimi brevis
Action: flexes 5th digit
Abductor digiti minimi
Action: abducts 5th digit
Flexor pollicis brevis
Action: flexes thumb
Abductor pollicis brevis
Action: abducts thumb
Opponens pollicis *
Origin: trapezium
Insertion: 1st metacarpal
Action: opposes thumb
Opponens digiti minimi
Action: opposes 5th digit
