Radial Nerve Lesions

Question 1

Pathway- radial nerve

Answer 1

-Continuation of c5+T1 and the posterior cord
-through the spinal groove of the humerus + under the fibrous arch of triceps coursing posterolaterally down the arm
-in then winds around the arcade of frohse + then comes back posteriorly to travel down the post lat forearm to the thumb + index finger

Question 2

What muscles innervated by the radial nerve

Answer 2

-triceps
-extensor carpi radialis longus
-extensor pollicis brevis
-anconeus
-extensor digitorum
-abductor pollicis longus
-brachioradialis
-extensor carpi radialis brevis
-extensor carpi ulnaris
-extensor pollicis longus
-extensor indicis

Question 3

Wrist drop

Answer 3

Wrist hangs in flexion as wrist flexors are unopposed due to flaccid wrist extensors