Mehlman lower limb nerves

Question 1

Common peroneal
(fibular) nerve. What CP?

Answer 1

The answer on USMLE if patient loses both eversion and dorsiflexion of the foot.

Question 2

The answer on USMLE if patient loses both eversion and dorsiflexion of the foot?

Answer 2

Common peroneal
(fibular) nerve

Question 3

Common peroneal
(fibular) nerve. Sensation of what part?

Answer 3

Sensation to upper third of lateral leg (around and below lateral knee)

Question 4

Sensation to upper third of lateral leg (around and below lateral knee). nerve?

Answer 4

Common peroneal (fibular) nerve.

Question 5

which nerve splits into superficial and deep peroneal (fibular) nerves?

Answer 5

Common peroneal (fibular) nerve.

Question 6

Common peroneal (fibular) nerve. splits into what nerves?

Answer 6

Splits into superficial and deep peroneal (fibular) nerves

Question 7

Superficial peroneal nerve. CP?

Answer 7

The answer on USMLE if patient loses only eversion of the foot, but dorsiflexion stays intact.

Question 8

The answer on USMLE if patient loses ONLY eversion of the foot, but dorsiflexion stays intact.?

Answer 8

Superficial peroneal nerve.

Question 9

Superficial peroneal nerve.
sensation?

Answer 9

Sensation to lower lateral leg and dorsum of foot.

Question 10

Sensation to lower lateral leg and dorsum of foot. what nerve?

Answer 10

Sensation to lower lateral leg and dorsum of foot.

Question 11

Deep peroneal nerve. CP?

Answer 11

The answer on USMLE if patient only loses dorsiflexion of the foot, but eversion stays intact.

Question 12

The answer on USMLE if patient only loses dorsiflexion of the foot, but eversion stays intact. What nerve?

Answer 12

Deep peroneal nerve.

Question 13

Deep peroneal nerve.
Deep for Dorsiflexion, which means superficial is the one that does eversion instead.

Answer 13

.

Question 14

Deep peroneal nerve. Loss of dorsiflexion causes ….?

Answer 14

Loss of dorsiflexion causes a high-steppage gait (patient has to lift foot high into the air with each step).

Question 15

Deep peroneal nerve. sensation?

Answer 15

Also does sensation to webbing between 1st and 2nd toes.

Question 16

Also does sensation to webbing between 1st and 2nd toes, what nerve?

Answer 16

Deep peroneal nerve.

I’ve never seen NBME Qs ask or give a fuck about this sensation detail, but students get fanatical about it as if it’s supposed to be high-yield.

Question 17

Tibial nerve. CP?

Answer 17

The answer on USMLE if patient loses plantarflexion of the foot (can’t stand on tippytoes).

Question 18

The answer on USMLE if patient loses plantarflexion of the foot (can’t stand on tippytoes). nerve?

Answer 18

Tibial nerve.

Question 19

Tibial nerve. What sensation?

Answer 19

Sensation to bottom of foot / heel

Question 20

Sensation to bottom of foot / heel. Nerve?

Answer 20

Tibial nerve.

Question 21

Sciatic nerve. CP?

Answer 21

The answer on USMLE if patient has motor dysfunction of tibial and common peroneal nerves at the same time, or has sciatica (shooting pain down leg).

Question 22

The answer on USMLE if patient has motor dysfunction of tibial and common
peroneal nerves at the same time, or has sciatica (shooting pain down leg).?

Answer 22

Sciatic nerve.

Question 23

Sciatic nerve. splits to what 2?

Answer 23

Splits into the common peroneal nerve and tibial nerve.

Question 24

Splits into the common peroneal nerve and tibial nerve. which nerve?

Answer 24

Sciatic nerve.

Question 25

Sciatic nerve. does it supply sensation?

Answer 25

Does not supply sensation to thigh; sensation encompasses that supplied by the combination of the common peroneal nerve and tibial nerves

Question 26

Sciatic nerve. Supplies some motor function to muscles of thigh but USMLE doesn’t care.

Answer 26

.

Question 27

Sciatic nerve. What is sciatica?

Answer 27

Sciatica = shooting pain from the lower back down the leg usually as the result of disc herniation

Question 28

.......... = shooting pain from the lower back down the leg usually as the result of disc herniation

Answer 28

Sciatica

Question 29

Sciatic nerve. Sciatica. Tx?

Answer 29

2CK forms simply want NSAIDs as treatment;

Question 30

Sciatic nerve. Sciatica. Straight-leg test is classically used in part to diagnose, but I’ve seen this test show up on NBME material for simple lumbosacral strain (i.e., the test is non-specific and not reliable).

Answer 30

.

Question 31

Obturator nerve. CP?

Answer 31

The answer on USMLE if patient has inability to adduct the hip with loss of sensation to medial thigh.

Question 32

The answer on USMLE if patient has inability to adduct the hip with loss of sensation to medial thigh.?

Answer 32

Obturator nerve

Question 33

Femoral nerve. CP?

Answer 33

The answer on USMLE if patient cannot extend knee and/or has buckling at the knee.

Question 34

The answer on USMLE if patient cannot extend knee and/or has buckling at the knee?

Answer 34

Femoral nerve.

Question 35

Femoral nerve. Sensation?

Answer 35

Also does sensation to anterior thigh + medial leg (not thigh), although I haven’t seen sensation specifically asked for femoral nerve.

Question 36

Also does sensation to anterior thigh + medial leg (not thigh), although I haven’t seen sensation specifically asked for femoral nerve.

Answer 36

Femoral nerve.

Question 37

Saphenous nerve. CP? sensation

Answer 37

The answer on USMLE if patient loses sensation to medial leg

Question 38

The answer on USMLE if patient loses sensation to medial leg?

Answer 38

Saphenous nerve.

Question 39

Saphenous nerve. Branch of what?

Answer 39

Pure sensory branch of the femoral nerve.

Question 40

Pure sensory branch of the femoral nerve.?

Answer 40

Saphenous nerve.

Question 41

Sural nerve. CP sensation?

Answer 41

The answer on USMLE if patient loses sensation to lower lateral leg. In contrast, if sensation loss is upper lateral leg, that’s common peroneal nerve instead.

Question 42

The answer on USMLE if patient loses sensation to lower lateral leg. In contrast, if sensation loss is upper lateral leg, that’s common peroneal nerve instead.

Answer 42

Sural nerve.

Question 43

Sural nerve. Often confused with saphenous. Good way to remember is: suraL is Lateral, therefore saphenous must be the one that’s medial.

Answer 43

.

Question 44

Superior gluteal nerve. CP? pelvis, gait

Answer 44

The answer on USMLE if patient has Trendelenburg gait -> opposite side of pelvis will fall while walking, so patient will tilt trunk toward side of lesion while walking to maintain level pelvis.

Question 45

The answer on USMLE if patient has Trendelenburg gait -> opposite side of pelvis will fall while walking, so patient will tilt trunk toward side of lesion while walking to maintain level pelvis.

Answer 45

Superior gluteal nerve.

Question 46

Superior gluteal nerve. innvervates what muscles?

Answer 46

Innervates gluteus medius and minimus

Question 47

Innervates gluteus medius and minimus?

Answer 47

Superior gluteal nerve.

Question 48

Inferior gluteal nerve. CP?

Answer 48

The answer on USMLE if patient cannot squat, stand up from a chair, or go up/down stairs.

Question 49

The answer on USMLE if patient cannot squat, stand up from a chair, or go up/down stairs.

Answer 49

Inferior gluteal nerve.

Question 50

Inferior gluteal nerve. Innervates what muscle?

Answer 50

Innervates gluteus maximus

Question 51

Innervates gluteus maximus?

Answer 51

Inferior gluteal nerve.