Question

When a

decussation of ascending or descending spinal tracts occur in the
spinal cord level, at which of the structures above do sensory or
motor signals cross contralaterally?

Answer 1

The sensory or motor signals cross contralaterally in the spinal cord at the level of decussation.

Step-by-step explanation:

The sensory or motor signals cross contralaterally at the level of the spinal cord where decussation occurs. In the case of the dorsal column pathway, decussation happens in the medulla, whereas for the spinothalamic pathway, decussation occurs at the level of entry in the spinal cord.