Lower arm muscles Flashcards
Anterior compartment, flexors superficial group and nerves:
- Pronator teres (median)
- Flexor carpi radialis (median)
- Palmaris longus (median)
- Flexor carpi ulnaris (ulnar nerve)
Anterior compartment, flexors intermediate group and nerves:
Flexor digitorum superficialis (median nerve)
Anterior compartment, flexors deep group and nerves:
- Flexor digitorum profundus (median and ulnar)
- Flexor pollicis longus (median nerve)
- Pronator quadratus (median nerve)
Pronator teres action? Nerve?
- pronation
- weak elbow flexion
- median nerve
Flexor carpi radialis (carpal tunnel) action? Nerve?
- wrist flexion
- radial deviation
- elbow flexion
- median nerve
Palmaris longus action? Nerve?
- wrist flexion
- radial deviation
- elbow flexion
- median nerve
Flexor carpi ulnaris action? Nerve?
- wrist flex
- ulnar deviation
- elbow flexion
- ulnar nerve
Flexor digitorum superficialis action? Nerve?
- flexion of middle and proximal phalanges
- wrist and elbow flex
- median nerve
Flexor digitorum profundus action? Nerve?
- finger flexion
- wrist flexion
- median and ulnar nerves
Flexor pollicis longus action? Nerve?
- thumb flexion
- wrist flexion
- median nerve
Pronator quadratus action? Nerve?
- pronation
- median nerve
Lateral “mobile wad” (radialis group)
- Brachioradialis
- ECRL
- ECRB
Dorsal (posterior compartment) forearm (superficial and deep) and nerves:
- Superficial
- Extensor dititorum (radial nerve)
- extensor digiti minimi (radial nerve)
- Extensor carpi ulnaris (radial nerve)
- Deep
- Supinator (radial nerve)
- abductor pollicis longus (radial nerve)
- extensor pollicis brevis and longus (radial nerve)
- extensor indicis (radial nerve)
Extensor digitorum action? Nerve?
- extension of MCP joints
- wrist extension
- weak elbow extension
- radial nerve
Extensor digiti minimi action? Nerve?
- extension and abduction of 5th finger
- wrist extension
- weak elbow extension
- radial nerve
Extensor carpi ulnaris action? Nerve?
- extension of wrist
- ulnar deviation
- weak elbow extension
- radial nerve
Supinator action? Nerve?
- supination
- elbow extension
- radial nerve
Abductor pollicis longus action? Nerve?
- extends 1st metacarpal
- wrist radial deviation
- radial nerve
Extensor pollicis brevis action? Nerve?
- extension of proximal phalanx of thumb
- radial deviation
- radial nerve
Extensor pollicis longus action? Nerve?
- extends distal phalanx of thumb
- extends first metacarpal
- wrist extension
- radial deviation
- radial nerve
Extensor indicis action? Nerve?
- extends index finger and wrist
- radial nerve
Extensor carpi radialis longus action?
Extensor carpi radialis brevis action?
- wrist extension and radial deviation
- elbow flexion
Brachioradialis action?
- elbow flexion
- half pronation from supination and vice versa
Tendons in the anatomical snuffbox:
- abductor policis longus
- extensor policis brevis
- extensor pollicis longus
Lumbricals action?
flex digits at MCP and extend at IP
Palmar interossei action? Nerve?
Dorsal interossei action? Nerve?
- Palmar interossei:
- Adduct fingers (toward) middle finger at MCP joints (PAD)
- assist lumbricals deep
- ulnar nerve
- Dorsal interossei:
- Abduct fingers (away) from middle finger at MCP joints (DAB)
- assist lumbricals deep
- ulnar nerve
- Nerve?
- Abductor digiti minimi
- Flexor digiti minimi brevis
- Opponens ditigi minimi
ulnar nerve
