Final answer:
The spino-cerebellum receives proprioceptive and tactile information from the spinal cord, which is used to compare intended motor actions with actual movement and adjust accordingly.
Step-by-step explanation:
The spino-cerebellum receives proprioceptive and tactile information from the spinal cord. This sensory information is crucial for the cerebellum's role in maintaining balance and coordinating movements. The spino-cerebellum's ability to compare motor commands from the cortex with proprioceptive feedback enables it to send corrective commands to the muscles through descending pathways, ensuring smooth and coordinated physical activities.
Input to the spino-cerebellum chiefly consists of two types: motor commands from the cerebral cortex and proprioceptive information from the periphery of the body. The proprioceptive input is relayed via spinal and cranial nerves to a nucleus in the medulla known as the inferior olive, which then sends this information to the cerebellum. Here, the spino-cerebellum compares the intended motor actions with the actual body position and movement, and sends the necessary corrective feedback.
Therefore, the correct answer for what input the spino-cerebellum receives is b. Proprioceptive and tactile information from the spinal cord.