Final answer:
The dorsal route is primarily sensory, involved in carrying information such as fine touch, vibration, and proprioception from the body to the brain.
Step-by-step explanation:
The dorsal route in the context of the spinal cord is primarily associated with sensory functions. Specifically, the dorsal column pathway carries information related to fine touch, vibration, and proprioception.
This pathway is one of the major ascending tracts in the spinal cord and it ensures that sensory input from various stimuli is carried to the brain. When discussing the segregation of pathways within the spinal cord, it is important to note that the dorsal column pathway, which ascends ipsilaterally, decussates in the medulla, while the spinothalamic pathway, which primarily conveys pain and temperature, decussates at the level of entry and ascends contralaterally.
In this context, the information processed through the dorsal side pertains to the sensory system, particularly in terms of touch and proprioceptive signals. In contrast, the ventral side largely pertains to motor functions. Thus, the correct answer to whether the dorsal route is primarily sensory or motor is A) Sensory.