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Anatomy · USMLE Step 1 · Healthcare and Nursing

USMLE Anatomy: Nerves and Dermatomes

Peripheral nerves, their motor/sensory territory, and dermatome landmarks (e.g. nipple = T4).

About this set

40 basic cards for USMLE Step 1 Anatomy. Set 10 of 14 in USMLE Anatomy. It opens with "Dermatome C3 corresponds to which anatomical landmark?" and "Dermatome C4 corresponds to which anatomical landmark?". Study it alongside the other USMLE Step 1 sets below.

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Dermatome C3 corresponds to which anatomical landmark?
Show answerLateral neck and ear lobe level
Dermatome C4 corresponds to which anatomical landmark?
Show answerTop of shoulder
Dermatome T4 corresponds to which anatomical landmark?
Show answerNipple line
Dermatome T7 corresponds to which anatomical landmark?
Show answerXiphoid process
Dermatome T10 corresponds to which anatomical landmark?
Show answerUmbilicus
Dermatome L1 corresponds to which anatomical landmark?
Show answerInguinal ligament
Dermatome L4 corresponds to which anatomical landmark?
Show answerKnee (medial aspect)
Dermatome S1 corresponds to which anatomical landmark?
Show answerLateral foot and heel
Dermatomes S2-S4 correspond to which anatomical region?
Show answerAnal and genital region
Dermatome T8 corresponds to which anatomical landmark?
Show answerCostal margin
Radial nerve injury causes which motor deficit?
Show answerWrist drop, loss of finger extension
Ulnar nerve injury causes which hand deformity?
Show answerClaw hand (MCP hyperextension, PIP/DIP flexion)
Common peroneal nerve injury results in which gait abnormality?
Show answerFoot drop due to loss of dorsiflexion
Musculocutaneous nerve innervates which muscles?
Show answerBiceps, brachialis, and coracobrachialis
Axillary nerve innervates which muscles?
Show answerDeltoid and teres minor

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