MSK 3b: anterior forearm Flashcards
Superficial muscles of anterior forearm from lateral to medial?
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Pronator teres origin?
Medial epicondyle of humerus and coronoid process of ulna
Pronator teres insertion?
Lateral side of the mid-shaft of the radius
Pronator teres innervation?
Median C6,C7
Pronator teres action?
Forearm pronation
Flexor carpi radialis origin?
Medial epicondyle of humerus
Flexor carpi radialis insertion?
Base of 2nd and 3rd metacarpals
Flexor carpi radialis innervation?
Median C6, C7
Flexor carpi radialis action:
Flexion and ABduction at wrist
Palmaris longus origin?
Medial epicondyle of humerus
Palmaris longus insertion?
Flexor retinaculum
Palmaris longus innervation?
Median C7,C8
Palmaris longus action?
Flexes at wrist
Absent in 15%
Flexor carpi ulnaris origin?
Medial epicondyle of humerus
Flexor carpi ulnaris insertion?
Pisiform
Flexor carpi ulnaris innervation?
Ulnar C7 C8
Flexor carpi ulnaris action?
Flexion and ADduction of wrist
Flexor digitorum superficialis (intermediate layer) origin
Medial epicondyle of humerus
Radial head-superior half of anterior border
Median nerve and ulnar artery pass between its two heads then go posteriorly
Flexor digitorum superficialis (intermediate layer) insertion
Shafts of the middle phalanges of the medial 4 digits (splits into 4 tendons @ wrist and travels through carpal tunnel)
Flexor digitorum superficialis (intermediate layer) innervation
Median nerve C7,C8,T1
Flexor digitorum superficialis (intermediate layer) action
Flexes MCP joints and proximal IP joints
Flexor digitorum profundus origin
Ulna (proximal 3/4) and interosseous membrane
Flexor digitorum profundus insertion
Distal phalanges of the 4 digits (splits into 4 tendons in carpal tunnel)
Flexor digitorum profundus innervation
Medial half (little and ring) ulnar (C8,T1) Lateral half (middle and index) median (C8,T1-anterior interosseous branch)
