Arm Flashcards
What muscles flex the elbow (3)
- biceps brachii
- brachialis
- brachioradialis
Biceps brachii
o = supraglenoid tubercle (long head), coracoid process (short head)
i = radial tuberosity
a = elbow/shoulder flexion
n = musculocutaneous
Brachialis
o = anterior shaft, humerus
i = ulna
a = flex elbow
n = musculocutaneous
Brachioradialis
o = supracondylar ridge (distal, lateral humerus)
i = radial tubercle
a = elbow flexion, pronation
n = radial
What muscle extends the elbow
triceps
Triceps brachii
o = infraglenoid tubercle (long), lateral shaft (lateral), posterior shaft (short)
i = olecranon process
a = elbow extension
n = radial
What are the wrist flexors/pronators (4)
- pronator teres
- flexor carpi radialis
- palmaris longus
- flexor carpi ulnaris
pronator teres
o = medial epicondyle
i = radius
a = pronate forarm
n = median
flexor carpi radialis
o = medial epicondyle, humerus
i = base of 2nd + 3rd metacarpals
a = flex wrist
n = median
flexor carpi ulnaris
o = medial epicondyle
i = pisiform, hamate, base of 5th metacarpal
a = flex wrist
n = ulnar
Palmaris longus
o = medial epicondyle
i = palmar fasciae
a = flex wrist
n = median
What muscles extend the wrist (3)
- extensor carpi radialis longus
- extensor carpi radialis brevis
- extensor carpi ulnaris
Extensor carpi radialis longus
o = lateral epicondyle
i = 2nd metacarpal
n = radial
extensor carpi radialis brevis
o = lateral epicondyle
i = 3rd metacarpal
n = radial
extensor carpi ulnaris
o = lateral epicondyle
i = 3rd metacarpal
n = radial
what are the finger + thumb extensors / abductors (4)
- extensor digitorum
- abductor pollucis longus
- extensor pollucis brevis
- extensor pollucis longus
extensor digitorum
o = lateral epicondyle
i = extensor expansions, 4 fingers
n = radial
Abductor pollucis longus
o = ulna + radius
i = 1st metacarpal
n = radial
Extensor pollucis brevis
o = radius
i = proximal phalanx of thumb
n = radial
extensor pollucis longus
o = ulna
i = distal phalanx of thumb
n = radial
What muscles flex the fingers (3)
- flexor digitorum superficialis
- flexor digitorum profundus
- flexor pollucis longus
flexor digitorum superficialis
o = medial epicondyle
i = middle phalanges 2-5
n = median
flexor digitorum profundus
o = anterior ulna, interosseus membrane
i = distal phalanges digits 2-5
n = median + ulnar
flexor pollucis longus
o = anterior radius, interosseus membrane
i = distal phalanx, thumb
n = median
