There is no such thing as a cerellbrum.
The CEREBRUM and CEREBELLUM are two different parts of the brain.
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One of the main functions of the cerebrum is to control higher brain functions such as thinking, memory, reasoning, and voluntary movements. It is also responsible for processing sensory information and controlling emotions.
The most characteristic symptom of cerebellar degeneration is a wide-legged, unsteady, lurching walk, usually accompanied by a back and forth tremor in the trunk of the body. Other symptoms include slow, unsteady and jerky movement of the arms or legs, slowed and slurred speech, and nystagmus -- rapid, small movements of the eyes.