sentences:  While Hall believed that the reflex arc was mediated by the spinal cord, separate from the cerebrum, Laycock argued that the brain underwent the same reflex patterns as the rest of the nervous system.After learning the German language, he translated books by Johann August Unzer, who studied afferent and efferent reflexes.Unzer centralised the nervous system in the spinal cord, such that reflexes could occur even without a functional brain, which only controls conscious activity.