Final answer:
The nucleus dorsalis of Clark is located in the spinal cord and is involved in proprioception and unconscious muscle control.
Step-by-step explanation:
The nucleus dorsalis of Clark is located in the spinal cord. It is associated with proprioception (the sense of body position) and unconscious muscle control. This nucleus receives sensory information from the muscle spindles in the muscles and sends signals to the cerebellum to help coordinate muscle movements.