Motor Supply

Question 1

What is the motor supply of the sciatic nerve?

Answer 1

Motor: semitendinosus, semimembranosus, biceps femoris and the hamstring part of
adductor magnus

Question 2

What is the motor supply of tibial nerve?

Answer 2

Motor: gastrocnemius, soleus, plantaris, popliteus, tibialis posterior, f digitorum longus & f hallucis longus

Question 3

What is the motor supply of the superficial peroneal nerve?

Answer 3

Motor: fibularis/peroneus longus & brevis

Question 4

What is the motor supply of the deep peroneal nerve?

Answer 4

Motor: ext digitorum longus, ext hallucis longus tibialis anterior & fibularis tertius

Question 5

What is the motor supply of the radial nerve?

Answer 5

Motor: triceps, brachioradialis, extensor carpi radialis longus & lat part of brachialis, Anconeus

Question 6

What is the motor supply of the posterior interosseus nerve?

Answer 6

Motor:supplies all muscles in the extensor compartment of the arm - supinator, extensor carpi radialis brevis, extensor digitorum, extensor carpi ulnaris extensor digiti minimi, extensor indicis, extensor pollicis longus and brevis, abductor pollicis longus

Question 7

What is the motor supply of the median nerve?

Answer 7

Motor: Pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis
Lateral branch: abductor pollicis brevis, flexor pollicis brevis, opponens pollicis (thenar eminence) & 1st lumbrical
Medial branch: 2nd lumbrical

Question 8

What is the motor supply of the ulnar nerve?

Answer 8

Motor: flexor carpi ulnaris, medial part of flexor digitorum profundus
Superficial branch - palmaris brevis
Deep branch - abductor digiti minimi, flexor digiti minimi, opponens digiti
minimi (hypothenar muscles), medial 2 lumbricals, all the interossei, and adductor pollicis