Wrist and Hand Muscles

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Extensor Carpi Radialis Longus Muscle Actions _____ of wrist A_duction of wrist Weak ____ of elbow Weak _____ to neutral from a fully supinated position

Extension Abduction Weak flexion Weak pronation

Extensor Carpi Ulnaris Muscle Actions _____ of wrist A_duction of wrist together with flexor carpi ulnaris muscle Weak _____ of elbow

Extension Adduction Weak extension

Extensor Carpi Radialis Brevis Muscle Actions _____ of wrist A_duction of wrist Weak ____ of elbow

Extension of wrist Abduction of wrist Weak flexion of elbow

Flexor Digitorum Superficialis Muscle Actions _____ of fingers at metacarpophalangeal & proximal interphalangeal joints _____ of wrist Weak _____ of elbow

Flexion Flexion Weak Flexion

Flexor Carpi Radialis Muscle actions ____ of wrist ________of wrist Weak _____ of elbow Weak ______ of forearm

Flexion Abduction Weak flexion Weak pronation

Flexor Carpi Ulnaris Muscle Actions ____ of wrist A_duction of wrist, together with extensor carpi ulnaris muscle Weak _____ of elbow

Flexion Adduction Weak flexion

Palmaris Longus Muscle Actions ____ of wrist Weak _____ of elbow

Flexion Weak flexion

Extensor Carpi Radialis Brevis Muscle Origin and Insertion

O: Lateral epicondyle of humerus I: Base of third metacarpal

Extensor Carpi Ulnaris Muscle Origin and Insertion

O: Lateral epicondyle of humerus Middle two-fourths of the back border of the ulna I: Base of 5th metacarpal (dorsal surface)

Extensor Carpi Radialis Longus Muscle Origin and Insertion

O: Lower one-third of the lateral supercondylar ridge of humerus and lateral epicondyle of the humerus I: Base of 2nd metacarpal (back surface)

Flexor Carpi Radialis Muscle Origin and Insertion

O: Medial epicondyle of humerus I: Base of second and third metacarpal, front palmar surface

Palmaris Longus Muscle Origin and Insertion

O: Medial epicondyle of humerus I: Palmaris aponeurosis of 2nd-5th metacarpals

Flexor Carpi Ulnaris Muscle Origin and Insertion

O: Medial epicondyle of humerus, back part of proximal ulna I: Pisiform, hamate, and base of 5th metacarpal

Flexor Digitorum Superficialis Muscle Origin Ulnar and Radial and Insertion

O: Medial epicondyle of the humerus Ulnar head: medial coronoid process Radial head: Upper two-thirds of anterior border of radius I: Split tendons attach to sides of middle phalons of 4 fingers


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