🏥 USMLE Exam Prep

A patient presenting with impaired proprioception, vibration sense, and fine touch discrimination on the ipsilateral side below the level of a spinal cord lesion likely has damage to which ascending pathway?

A Spinothalamic tract
B Dorsal columns
C Spinocerebellar tract
D Corticospinal tract

✓ Correct Answer: Option B

The dorsal columns (gracile and cuneate fasciculi) transmit conscious proprioception, vibration sense, and fine touch from the ipsilateral body to the brainstem, decussating in the medulla.

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