Nerves

Question 1

Axillary nerve function and spinal cord level

Answer 1

Arm abduction >15 deg, sensation over deltoid muscle and lateral arm, C5-C6

Question 2

Musculocutaneous nerve function and spinal cord level

Answer 2

Forearm flexion and supination, sensation over lateral forearm, C5-C7

Question 3

Radial Nerve function and spinal cord level

Answer 3

Extension at all arm, wrist and finger joints below the shoulder, forearm supination, thumb abduction in plane of palm, sensation over posterior arm/forearm and dorsal hand, C5-T1,

Question 4

Median nerve function and spinal cord level

Answer 4

Thumb flexion & opposition, flexion of digits 2 & 3, wrist flexion & abduction, forearm pronation, sensation over thenar eminence and dorsal & palmar of fingers 2, 3 and half of 4, C5-T1

Question 5

Ulnar nerve function and spinal cord level

Answer 5

Finger adduction & abduction other than thumb, flexion of digits 4 & 5, wrist flexion & adduction, sensation over finger 5 & half of 4 and hypothenar eminence, C8-T1

Question 6

Recurrent branch of median nerve injury

Answer 6

“Ape hand”, loss of thenar muscle group: opposition, abduction, and flexion of thumb, no loss of sensation

Question 7

Supraspinatus function and innervation

Answer 7

Abduction, Suprascapular nerve, C5-C6

Question 8

Infraspinatus function and innervation

Answer 8

External rotation, Suprascapular nerve, C5-C6

Question 9

Teres minor function and innervation

Answer 9

Adduction and external rotation, Axillary nerve, C5-C6

Question 10

Subscapularis function and innervation

Answer 10

Adduction and internal rotation, Upper & Lower Subscapular nerve, C5-C6