Neuroanatomy basics · USMLE Step 1

Damage to the precentral gyrus results in which deficit?

  1. Loss of somatosensation
  2. Loss of motor function
  3. Impaired visual processing
  4. Impaired auditory comprehension
Show answer and explanation

Correct answer: Loss of motor function

The precentral gyrus contains the primary motor cortex. Lesions cause contralateral motor weakness or paralysis.

Difficulty: Medium Question 15 of 20

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