How can we help?

You can also find more resources in our Help Center.

56 terms

Chapter 4- hand/UE muscle functions/nerve innervations

Chapter 4 of TherapyEd study guide, 5th edition
STUDY
PLAY
Intrinsic hand muscles innervated by the median nerve
abductor pollicis brevis, opponens pollicis, flexor pollicis brevis: superficial head, lumbricals (radial side)
Function of opponens pollicis
opposition
Function of flexor pollicis brevis: SUPERFICIAL head
thumb MCP flexion, deep head innervated by ULNAR nerve
Function of lumbricals (radial side)
MCP flexion and extension of IP joints
Intrinsic hand muscles innervated by the ulnar nerve
abductor digiti minimi, opponens digiti minimi, flexor digiti minimi, lumbricals (ulnar side), palmar interossei, dorsal interossei
Function of abductor digiti minimi
abduction of the 5th digit
Function of opponens digiti minimi
opposition of the 5th digit
Function of flexor digiti minimi
flexion of MCP joint and opposition of the 5th digit
Function of lumbricals (ulnar side)
MCP flexion and extension of IP joints of digits IV and V
Function of palmar interossei
adduction and assistance with MCP flexion and extension of IP joints of digits II through V
Function of dorsal interossei
abduction and assists with MCP flexion and extension of IP joints of digits II through V
Extrinsic flexor muscles innervated by the median nerve
flexor digitorum superficialis (FDS), flexor digitorum profundus (FDP), flexor pollicis longus (FPL)
Function of flexor digitorum superficialis
flexion of PIP joints
Function of Flexor digitorum profundus
flexion of DIP joints to digits II and III
Function of flexor pollicis longus
flexion of IP joint of thumb
Extrinsic flexors of the hand innervated by the ulnar nerve
flexor digitorum profundus
Function of flexor digitorum profundus
flexion of DIP joints to digits IV and V
Extrinsic muscles of the hand innervated by the radial nerve
extensor digitorum communis (EDC), extensor digiti minimi (EDM), extensor indicis, extensor pollicis longus (EPL), extensor pollicis brevis (EPB), abductor pollicis longus (APL)
Function of extensor digitorum communis
extension of MCP joints and contributes to extension of the IP joints
Function of extensor digiti minimi
extension of MCP joint of the 5th digit and contributes to extension of the IP joints
Function of extensor indicis
extension of MCP joint of the 2nd digit and contributes to extension of the IP joints
Function of extensor pollicis longus
extension of IP joint of the thumb
Function of extensor pollicis brevis
extension of MCP and CMC joints of the thumb
Function of abductor pollicis longus
abduction and extension of CMC joint
Wrist flexors innervated by the median nerve
flexor carpi radialis (FCR) and palmaris longus (PL)
Function of flexor carpi radialis
flexion of wrist and radial deviation
Function of palmaris longus
flexion of wrist
Wrist flexors innervated by the ulnar nerve
flexor carpi ulnaris (FCU)
Function of flexor carpi ulnaris
flexion of wrist and ulnar deviation
Wrist extensors innervated by the radial nerve
extensor carpi radialis brevis (ECRB), extensor carpi radialis longus (ECRL), extensor carpi ulnaris (ECU)
Function of extensor carpi radialis brevis/longus (same function)
extension of wrist and radial deviation
Function of extensor carpi ulnaris
extension of wrist and ulnar deviation
Volar forearm muscles innervated by the median nerve
pronator teres and pronator quadratus
Function of pronator teres and pronator quadratus (same function)
forearm pronation
Dorsal forearm muscles innervated by the radial nerve
supinator
Function of the supinator
forearm supination
Elbow flexors and what nerve they are innervated by
biceps and brachialis (innervated by musculocutaneous nerve) and brachioradialis (innervated by radial nerve)
Biceps and brachialis forearm position?
elbow flexion with forearm pronated
Brachioradialis forearm position?
elbow flexion with forearm neutral
Elbow extensors and what nerve they are innervated by
triceps and anconeus are both innervated by the radial nerve
Rotator cuff muscles and what nerve they are innervated by
"SITS": subscapularis (subscapular nerve), infraspinatus (suprascapular nerve), teres minor (axillary nerve), supraspinatus (suprascapular nerve)
Function of subscapularis
internal rotation
Function of infraspinatus
external rotation
Function of teres minor
external rotation
Function of supraspinatus
abduction and flexion
Shoulder flexion muscles and what nerve they are innervated by
anterior deltoid (axillary nerve), coracobrachialis (musculocutaneous nerve), supraspinatus (musculocutaneous nerve)
Shoulder abduction muscles and what nerve they are innervated by
middle deltoid (axillary nerve) and supraspinatus (musculocutaneous nerve)
Shoulder horizontal abduction muscles and what nerve they are innervated by
posterior deltoid (axillary nerve)
Shoulder horizontal adduction muscles and what nerve they are innervated by
pectoralis major (lateral pectoral nerve)
Shoulder extension muscles and what nerve they are innervated by
latissimus dorsi (thoracodorsal nerve), teres major (subscapular nerve), posterior deltoid (axillary nerve)
Scapula upward rotation muscles and what nerve they are innervated by
trapezius (upper, middle and lower)(spinal accessory nerve (CN XI)) and serratus anterior (long thoracic nerve)
Scapula downward rotation muscles and what nerve they are innervated by
levator scapulae (C3-C4 nerves), rhomboids (major and minor)(dorsal scapular nerve), serratus anterior (long thoracic nerve), latissimus dorsi (thoracodorsal nerve)
Scapula adduction muscles and what nerve they are innervated by
middle trapezius (spinal accessory nerve (CN XI)) and rhomboid major (dorsal scapular nerve)
Scapula abduction muscles and what nerve they are innervated by
serratus anterior (long thoracic nerve)
Scapula elevation muscles and what nerve they are innervated by
upper trapezius (spinal accessory nerve (CN XI)) and levator scapulae (C3-C4 nerves)
Scapula depression muscles and what nerve they are innervated by
lower trapezius (spinal accessory nerve (CN XI))