KROK 1 2020 – Question 130 · KROK (Medicine) · Physiology
A victim of a traffic accident suffered damage to one half of the spinal cord and developed Brown-Sequard syndrome. What causes motor function disturbance on the damaged side below the site of trauma?
- A. The spinothalamic tract does not cross over at the level of its entry into the spinal cord and ascends on the side of the entry
- B. After their cross over the pyramidal tracts pass through the lateral funiculi of the spinal cord on the opposite side from the muscles they innervate
- C. Goll, Burdach, and Flechsig tracts are straight, while Gowers tract crosses over
- D. After their cross over the pyramidal tracts pass through the lateral funiculi of the spinal cord on the side of the muscles they innervate
- E. The spinothalamic tract crosses over at the level of its entry into the spinal cord and ascends on the opposite side
Hint
Remember that motor and sensory pathways switch sides at different levels, and decide which side of the cord the motor fibers to a limb occupy below a hemisection.
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