Mehlman lower limb nerves Flashcards
Common peroneal
(fibular) nerve. What CP?
The answer on USMLE if patient loses both eversion and dorsiflexion of the foot.
The answer on USMLE if patient loses both eversion and dorsiflexion of the foot?
Common peroneal
(fibular) nerve
Common peroneal
(fibular) nerve. Sensation of what part?
Sensation to upper third of lateral leg (around and below lateral knee)
Sensation to upper third of lateral leg (around and below lateral knee). nerve?
Common peroneal (fibular) nerve.
which nerve splits into superficial and deep peroneal (fibular) nerves?
Common peroneal (fibular) nerve.
Common peroneal (fibular) nerve. splits into what nerves?
Splits into superficial and deep peroneal (fibular) nerves
Superficial peroneal nerve. CP?
The answer on USMLE if patient loses only eversion of the foot, but dorsiflexion stays intact.
The answer on USMLE if patient loses ONLY eversion of the foot, but dorsiflexion stays intact.?
Superficial peroneal nerve.
Superficial peroneal nerve.
sensation?
Sensation to lower lateral leg and dorsum of foot.
Sensation to lower lateral leg and dorsum of foot. what nerve?
Sensation to lower lateral leg and dorsum of foot.
Deep peroneal nerve. CP?
The answer on USMLE if patient only loses dorsiflexion of the foot, but eversion stays intact.
The answer on USMLE if patient only loses dorsiflexion of the foot, but eversion stays intact. What nerve?
Deep peroneal nerve.
Deep peroneal nerve.
Deep for Dorsiflexion, which means superficial is the one that does eversion instead.
.
Deep peroneal nerve. Loss of dorsiflexion causes ….?
Loss of dorsiflexion causes a high-steppage gait (patient has to lift foot high into the air with each step).
Deep peroneal nerve. sensation?
Also does sensation to webbing between 1st and 2nd toes.
Also does sensation to webbing between 1st and 2nd toes, what nerve?
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.
Tibial nerve. CP?
The answer on USMLE if patient loses plantarflexion of the foot (can’t stand on tippytoes).
The answer on USMLE if patient loses plantarflexion of the foot (can’t stand on tippytoes). nerve?
Tibial nerve.
Tibial nerve. What sensation?
Sensation to bottom of foot / heel
Sensation to bottom of foot / heel. Nerve?
Tibial nerve.
Sciatic nerve. CP?
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).
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).?
Sciatic nerve.
Sciatic nerve. splits to what 2?
Splits into the common peroneal nerve and tibial nerve.
Splits into the common peroneal nerve and tibial nerve. which nerve?
Sciatic nerve.
Sciatic nerve. does it supply sensation?
Does not supply sensation to thigh; sensation encompasses that supplied by the combination of the common peroneal nerve and tibial nerves
Sciatic nerve.
Supplies some motor function to muscles of thigh but USMLE doesn’t care.
.
Sciatic nerve. What is sciatica?
Sciatica = shooting pain from the lower back down the leg usually as the result
of disc herniation
………. = shooting pain from the lower back down the leg usually as the result
of disc herniation
Sciatica
Sciatic nerve.
Sciatica. Tx?
2CK forms simply want NSAIDs as treatment;
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).
.
Obturator nerve. CP?
The answer on USMLE if patient has inability to adduct the hip with loss of
sensation to medial thigh.
The answer on USMLE if patient has inability to adduct the hip with loss of
sensation to medial thigh.?
Obturator nerve
Femoral nerve. CP?
The answer on USMLE if patient cannot extend knee and/or has buckling at the
knee.
The answer on USMLE if patient cannot extend knee and/or has buckling at the
knee?
Femoral nerve.
Femoral nerve. Sensation?
Also does sensation to anterior thigh + medial leg (not thigh), although I haven’t
seen sensation specifically asked for femoral nerve.
Also does sensation to anterior thigh + medial leg (not thigh), although I haven’t
seen sensation specifically asked for femoral nerve.
Femoral nerve.
Saphenous nerve. CP? sensation
The answer on USMLE if patient loses sensation to medial leg
The answer on USMLE if patient loses sensation to medial leg?
Saphenous nerve.
Saphenous nerve. Branch of what?
Pure sensory branch of the femoral nerve.
Pure sensory branch of the femoral nerve.?
Saphenous nerve.
Sural nerve. CP sensation?
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.
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.
Sural nerve.
Sural nerve.
Often confused with saphenous. Good way to remember is: suraL is Lateral,
therefore saphenous must be the one that’s medial.
.
Superior gluteal nerve. CP? pelvis, gait
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.
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.
Superior gluteal nerve.
Superior gluteal nerve. innvervates what muscles?
Innervates gluteus medius and minimus
Innervates gluteus medius and minimus?
Superior gluteal nerve.
Inferior gluteal nerve. CP?
The answer on USMLE if patient cannot squat, stand up from a chair, or go up/down stairs.
The answer on USMLE if patient cannot squat, stand up from a chair, or go up/down stairs.
Inferior gluteal nerve.
Inferior gluteal nerve. Innervates what muscle?
Innervates gluteus maximus
Innervates gluteus maximus?
Inferior gluteal nerve.
