Final answer:
Sensory decussation occurs in the medulla, which is 1. superior to the spinal cord where motor decussation takes place. Thus, sensory decussation happens superiorly to motor decussation.
Step-by-step explanation:
Sensory decussation refers to the crossing of sensory signals in the brain or spinal cord. Motor decussation, on the other hand, refers to the crossing of motor signals. Understanding the relationship between these processes is essential in neuroscience and neuroanatomy.
In the context of the central nervous system, sensory decussation occurs in the medulla, which is superior (above) to the spinal cord where motor decussation happens. The dorsal column-medial lemniscus pathway (which carries information about fine touch, vibration, and proprioception) decussates in the medulla. In contrast, the spinothalamic tract (responsible for pain and temperature sensations) decussates within the spinal cord at the level it enters.
Therefore, the answer to the question is that sensory decussation occurs superiorly to motor decussation.