Forearm Muscles Flashcards
What holds the tendons of the flexor muscles at the distal end?
Palmar carpal ligament
Flexor retinaculum
How many muscle are in the anterior superficial layer?
4
How many muscles are in the anterior intermediate layer?
1
How many muscles are in the anterior deep layer?
Three
Name the four muscles of the anterior superficial layer
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Name the muscle in the anterior intermediate layer
Flexor digitorum superficialis
Name the three muscles of the anterior deep compartment
Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus
What are the only muscles not supplied by the median nerve in the anterior compartment? What are they supplied by?
Flexor carpi ulnaris
Medial half of the flexor digitorum profundus
Actions of the pronator teres?
Pronates and flexes forearm
Action of the flexor carpi radialis?
Flexes and abducts hand at wrist
Action of flexor carpi ulnaris?
Flexes and adducts hand at wrist
Action of palmaris longus?
Flexes hand at wrist
Action of the flexor digitorum superficialis?
Flexes middle phalanges at proximal IP joints
Flexes proximal phalanges at MCP joints
Action of the flexor digitorum profundus?
Flexes distal phalanges 2,3,4,5 at distal IP joints
From the posterior compartment, which muscles extend and abduct/adduct the hand at the wrist joint?
Extensor carpi radialis longus
Extensors carpi radialis brevis
Extensor carpi ulnaris
Of the posterior compartment, which muscles extend the medial four fingers?
Extensor digitorum
Extensor indicis
Extensor digiti minimi
Of the posterior compartment, which muscles extend/abduct the thumb?
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
What holds the extensor tendons in place at the wrist?
Extensor retinaculum
Action of the brachioradialis?
Flexion of forearm
Action of extensor carpi radialis longus and brevis?
Extend and abduct hand at the wrist joint
Action of the extensor digitorum?
Extends medial four digits at MCP joints and IP joint
Action of extensor digiti minimi?
Extends 5th digit at MCP joint and IP joint
Action of the extensor indicis?
Extends second digit
Extends hand at wrist
Action of abductor pollicis longus?
Abducts thumb and extends it at carpometacarpal joint
Action of extensor pollicis longus?
Extends distal phalanx of thumb at IP joint
Extends MCP and carpometacarpal joints
Action of extensor pollicis brevis?
Extends proximal phalanx of thumb at MCP joint
Extends carpometacarpal joint
