Anatomy - Nerve Damage

Question 1

Anterior hip dislocation, pelvic surgery

Answer 1

Obturator nerve - sensation in medial thigh and thigh adduction

Question 2

Obturator nerve fxns

Answer 2

sensation in medial thigh and thigh adduction

Question 3

Pelvic fracture, hematoma, abscess involving iliopsoas

Answer 3

Femoral nerve

Question 4

Femoral nerve function

Answer 4

Sensation in the anterior thigh & knee and medial leg;

Thigh flexion, leg extension, patellar reflex

Question 5

Fibular neck fracture or nerve compression at fibular neck

Answer 5

Common peroneal (fibular) nerve

Question 6

Common peroneal function

Answer 6

Sensation in lateral leg and foot dorsum;

Foot eversion, dorsiflexion, toe extension (foot drop)

Question 7

Knee trauma

Answer 7

Tibial nerve

Question 8

Tibial nerve function

Answer 8

Sensation in sole of foot;
foot inversion, plantar flexion, toe flexion
(need tibial to stand on tiptoes!)

Question 9

Posterior hip dislocation or buttocks injection

Answer 9

Superior gluteal nerve or inferior gluteal nerve

Question 10

Superior gluteal nerve function

Answer 10

No sensory function.

Thigh abduction.

Question 11

Inferior gluteal nerve function

Answer 11

No sensory function.

Thigh extension

Question 12

Fractured surgical neck or anterior dislocation of humerus

Answer 12

Axillary

Question 13

Axillary function

Answer 13

Sensation in lateral arm.

Arm abduction > 15 degrees

Question 14

Upper trunk compression

Answer 14

Musculocutaneous

Question 15

Musculocutaneous function

Answer 15

Sensation in lateral forearm.

Forearm flexion and supination.

Question 16

Midshaft fracture of humerus, compression of axilla (crutches)

Answer 16

Radial

Question 17

Radial function

Answer 17

Sensation in posterior arm & forearm and dorsal hand.
Elbow, wrist, finger extension. Grip strength.
(Wrist drop)

Question 18

Supracondylar fracture of humerus, carpal tunnel, wrist lesion

Answer 18

Median nerve

Question 19

Median nerve function

Answer 19

Sensation in thenar eminence, dorsal and palmar aspects of lateral 3 ½ fingers (proximal lesion);
Wrist and lateral finger flexion, thumb opposition, lumbricals of 2nd and 3rd digits (ape hand, Pope’s blessing)

Question 20

Fracture of medial epicondyle of humerus; fractured hook of hamate

Answer 20

Ulnar nerve

Question 21

Ulnar nerve sensory and motor deficit

Answer 21

Sensation in medial 1 ½ fingers including hypothenar eminence;

Radial deviation of wrist upon flexion (prox), wrist and medial finger flexion, abduction and adduction of fingers, medial 2 lumbricals

Question 22

Superficial laceration of palm

Answer 22

Recurrent branch of median nerve

Question 23

Recurrent branch of median nerve sensory and motor deficit

Answer 23

No sensory defection.

Opposition, abduction, and flexion of thumb (thenars, “ape hand”).