Nerves of forearm Flashcards
Median n.
From Lateral C6,7 and Medial (C8,T1) cords of brachial plexus
innervates: All muscles of forearm, Except
1 1/2 muscles innervated by Ulnar n.
Flexor carpi ulnaris m. Flexor digitorum profundus m., medial 1/2
Median n. pathway?
enters cubital fossa medial to brachial a.
passes b/t heads of pronator teres
descend b/t flexor digitorum sup. and flexor digitorum prof.
passes trough CT to reach hand
Gives off branch to Thenar eminence: Recurrent brach of median n.
Which branch median n. gives off to thenar eminence?
recurrent branch
Branches that gives off median n. in ventral aspect of forearm?
Anterior interosseous (distal cubital fossa) Palmar cutaneous
Anterior interosseous accompanied the anterior interosseous a. and supplies…
Flexor digitorum profundus lateral 1/2
Flexor pollicis longus
Pronator Quadratus
Palmar cutaneous branch
branches from median n. pros to Flexor retinaculum
passes b/t tendon of palmaris longus and flexor carpi radialis
runs superficial to Flexor retinaculum
supplies cutaneous to palm
Ulnar n.
accompanied by ulnar a. (branch of brachial a.)
Only supplies motor to 1 1/2 muscles of forearm
Flexor carpi ulnari m.
Flexor digitorum profundus m., medial 1/2
much larger role in hand
Radial n.
Posterior cord of brachial plexus
innervates All extensors muscles of forearm plus Brachioradialis m. (flexor)
Pathway of radial n.?
Spiral groove of humerus, accompanied by profunda brachii a.in arm
enters cubital fossa, descends b/t brachialis m. and brachioradialis m.
At level of lateral epicondyle of humerus, it divides: superficial and deep branches
gives off 2 branches= dorsal aspect of forearm
branches of radial n.?
superficial branch: crosses over anatomical snuff box to dorsum of lateral hand
Deep branch: motor innervation to posterior compartment
anterior interosseous n. is from?
median n.
Posterior interosseous n. is from?
radial n.
