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?

Answer options

1. 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
2. Goll, Burdach, and Flechsig tracts are Straight, while Gowers tract crosses over
3. 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
4. After their cross over the pyramidal tracts pass through the lateral funiculi of the spinal cord on the side of the muscles they innervate
5. The spinothalamic tract crosses over at the level of its entry into the spinal cord and ascends on the opposite side