Muscle that move Radius and Ulna Flashcards
(12 cards)
Forearm Flexors
Biceps brachii
brachialis
brachioradialis
Forearm extensors
triceps brachii
anconeous
Forearm pronators
pronator teres
pronator quadratus
Forearm supinator
supinator
Biceps brachii
O: long head from supraglenoid tubercle (tubercle above glenoid cavity), short head from coracoid process of scapula
I: radial tuberosity and bicipital aponeurosis
A: flex and supinate forearm, flex arm at shoulder joint
N: musculocutaneous
Brachialis
O: distal anterior surface of humerus
I: ulnar tuberosity and coronoid process of ulna
A: flex forearm at elbow joint
N: musculocutaneous and radial nerves
brachioradialis
O: lateral border of distal end of humerus
I: superior to styloid process of radius
A: flex, supinate, and pronate forearm to neutral position
N: radial nerve
triceps brachii
O: long head from infraglenoid tubercle, lateral head from lateral and posterior surface of humerus, medial head from entire posterior surface of humerus inferior to groove of radial nerve
I: olecranon of ulna
A: extend foreram at elbow and arm at shoulder joints
N: radial nerve
anconeus
O: lateral epicondyle
I: olecranon and superior portion of shaft of ulna
A: extends forearm
N: radial nerve
pronator teres
O: medial epicondyle of humerus and coronoid process of ulna
I: midlateral surface of radius
A: pronates forearm at radioulnar joints and weakly flexes forearm at elbow
N: median nerve
pronator quadratus
O: distal portion of shaft of ulna
I: distal portion of shaft of radius
A: pronates forearm at radioulnar joints
N: median nerve
supinator
O: lateral epicondyle of humerus and ridge near radial notch of ulna (supinator crest)
I: lateral surface of proximal 1/3 of radius
A: supinates forearm
N: deep radial nerve
