Neuromuscular

Question 1

Foot dorsiflexion

Answer 1

• tests tibialis anterior

- innervated by deep peroneal nerve (L4, L5)

Question 2

Knee extension

Answer 2

• tests quadriceps

- innervated by femoral nerve (L2, L3, L4)

Question 3

Foot Inversion

Answer 3

• tests tibialis posterior

- innervated by tibial nerve (L4, L5)

Question 4

Trapezius

Answer 4

• shoulder elevation

- spinal accessory nerve (C3, C4)

Question 5

Rhomboids

Answer 5

• invert hand to back and push up

- dorsal scapular nerve (C4, C5)

Question 6

Serratus anterior

Answer 6

long thoracic nerve (C5, C6, C7)

Question 7

Supraspinatus

Answer 7

• abducting upper arm

- suprascapular nerve (C5, C6)

Question 8

Infraspinatus

Answer 8

• externally rotating the upper arm at the shoulder against resistance
• suprascapular (C5, C6)

Question 9

Lattisimus dorsi

Answer 9

• thoracodorsal nerve (C5, C6, C7)

Question 10

Musculocutaneous nerve

Answer 10

supplies BBC muscles: coracobrachialis, brachialis, and biceps

Question 11

C5 nerve radiculopathy

Answer 11

• biceps and deltoid weakness (raising and abducting arm at shoulder)
• diminished C5 reflex
• sensory innervation to lateral arm (axillary nerve)

Question 12

Erb-Duchenne palsy

Answer 12

• traumatic avulsion of C5-C6 nerve roots, usually during childbirth
• loss of shoulder abduction and elbow flexion
• arm is held in an internally rotated, extended position, with pronation of the forearm “waiter’s tip”

Question 13

How to differentiate between ulnar neuropathy and plexopathy

Answer 13

• test muscles which are innervated by lower trunk (C8-T1) but not ulnar nerve: abductor pollicis brevis, flexor pollicis longus, extensor indicis