| Term | Definition |
|---|
| flexor carpi radialis | O= medial epicondyle of humerus. I= anterior base of 2nd and 3rd metacarpals. F= wrist flexion and radial deviation |
| median nerve (C6,7) innervates | flexor carpi radialis and palmaris longus |
| flexor carpi ulnaris | O= humeral head: medial epicondyle of humerus; ulnar head: olecranon and posterior ulna. I= pisiform, hook of hamate and base of 5th metacarpal. F= wrist flexion and ulnar deviation |
| ulnar nerve (C7,8) innervates | flexor carpi ulnaris |
| palmaris longus | that one tendon that sticks out at the wrist when flexing; O= medial epicondyle of humerus. I= flexor retinaculum and palmar aponeurosis. F= helps with wrist flexion |
| flexor digitorum superficialis | humeroulnar head: medial epicondyle of humerus and coronoid process of ulna; radial head: anterior radius. I= middle phalanx of digits 2-5. F= flexion of wrist, MCP, and PIP joints |
| median nerve (C7-T1) nerve innervates | flexor digitorum superficialis |
| flexor digitorum profundus | O= anterior ulna and interosseoue membrane. I= distal phalanx of digits 2-5. F= flexes the wrist, MCP, PIP, and DIP joints This is the only muscle that can flex the DIP joints |
| 1/2 ulnar nerve and 1/2 median nerve (C7-T1) innervates | flexor digitorum profundus |
| extensor carpi radialis longus | O= lateral supracondylar ridge of humerus. I= dorsal base of 2nd metacarpal. F= wrist extension and radial deviation |
| radial nerve (C6,7) innervates | extensor carpi radialis longus, extensor carpi radialis brevis, and extensor pollicis brevis |
| extensor carpi radialis brevis | O= lateral epicondyle of humerus. I= dorsal base of 3rd metacarpal. F= wrist extension and radial deviation. |
| extensor carpi ulnaris | O= lateral epicondyle of humerus and posterior ulna. I= dorsal base of 5th metacarpal. F= wrist extension and ulnar deviation |
| radial nerve (C6-8) innervates | extensor carpi ulnaris, extensor digitorum communis, abductor pollicis longus, and extensor pollicis longus |
| extensor digitorum communis | O= lateral epicondyle of humerus. I= extensor hoods of digits 2-5. F= extends all finger joints and the wrist |
| flexor pollicis (thumb) longus | O= anterior radius and interoosseous membrane. I= distal phalanx of thumb. F= thumb flexion for all joints (CMP, IP, and MCP) |
| median nerve (C8,T1) innervates | flexor pollicis longus, abductor pollicis brevis, flexor pollicis brevis (thenar eminence), opponens pollicis (thenar eminence), and 1 &2 lumbricals |
| abductor pollicis longus | O= posterior ulna, radius and interosseous membrane. I= base of 1st metacarpal. F= abducts CMC joint |
| extensor pollicis longus | O= posterior ulna and interosseous membrane. I= base of distal phalanx of thumb. F= extends all of the thumb joints |
| extensor pollicis brevis | O= posterior radius and interosseous membrane. I= base of proximal phalanx of thumb. F= extends thumb CMP and MCP joints |
| C8, T1 nerves innervate | intrinsic muscles |
| adductor pollicis | O= oblique head: base of 2nd and 3rd metacarpals and adjacent carpal bones; transverse head: body of 3rd metacarpal. I= base of proximal phalanx of thumb. F= thumb adduction of CMC joint |
| ulnar nerve (C8-T1) innervates | adductor pollicis, abductor digiti minimi (hypothenar eminence), flexor digiti minimi (hypothenar eminence), opponens digiti minimi (hypothenar eminence), 3 and 4 lumbricals, dorsal interossei, and palmar interossei |
| abductor pollicis brevis (thenar eminence) | O= flexor retinaculum, scaphoid and trapezium. I= base of proximal phalanx of thumb. F= abducts the thumb at CMC joint |
| flexor pollicis brevis (thenar eminence) | O= flexor retinaculum and trapezium. I= base of proximal phalanx of thumb. F= flexes the thumb CMC and MCP joints |
| Opponens pollicis (thenar eminence) | O= flexor retinaculum and trapezium. I= metacarpal of thumb. F= CMC opposition |
| abductor digiti minimi (hypothenar eminence) | O= pisiform bone. I= base of proximal phalanx of 5th digit. F= abducts 5th digit MCP joint |
| opponens digiti minimi (hypothenar eminence) | O= hook of hamate bone and flexor retinaculum. I= 5th metacarpal. F= opposition of the pinky CMC joint |
| flexor digiti minimi (hypothenar eminence) | O= hook of hamate bone and flexor retinaculum. I= base of proximal phalanx of 5th digit. F= flexes 5th digit MCP joint |
| lumbricals | O= tendons of flexor digitorum profundus. I= extensor digitorum tendon of digits 2-5. F= flexion of the MCP joints and extension at the PIP and DIP joints |
| Dorsal interossei (D-A-B) | O= adjacent sides of 2 metacarpals. I= proximal phalanges. F= finger abduction of MCP joints |
| Palmar interossei (P-A-D) | O= palmar surfaces of metacarpals. I= proximal phalanges. F= finger adduction of MCP joints |
Combine with other sets
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