Mehl. lower limb nerves L4, L5, S1 Flashcards
(12 cards)
The answer on USMLE if patient loses knee (patellar) reflex + has weakened knee extension.?
L4
Pain / paresthesias / numbness in …… distribution (anterior thigh + medial leg).
L4
L4 radiculopathy = Disc herniation of L3-4.
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Just remember that L4 is the one where the knee reflex is fucked up.
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The answer on USMLE if patient loses dorsiflexion.?
L5 radiculopathy
Pain / paresthesias / numbness in ….. distribution (lateral + anterior leg).
L5 radiculopathy
Disc herniation of L4-L5 = L5 radiculopathy.
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The answer on USMLE if patient loses ankle (Achilles) reflex + has weakened plantar flexion.?
S1 radiculopathy
Pain / paresthesias / numbness in …….. distribution (sole of foot + lower leg).
S1
Disc herniation of L5-S1 = S1 radiculopathy.
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Just remember that S1 is the one where the ankle reflex is fucked up.
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SALT -> S1, Achilles, Lateral leg dermatome, Tibial motor issue (plantar flexion).
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