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Brain Tour

Brain Tour : Our Brain :

Focusing on the Cerebellum

Principal Parts of the brain

The cerebellum is the second largest part of the brain behind the medulla and pons and below the occipital lobe of the cerebrum.
The cerebellum consists of two cerebellar hemisphere. The surface of the cerebellum called the cerebellar cortex consists of gray matter. Beneath the cortex are white matter that resembles branches of a tree. The cerebellum is attached to the brain stem by three paired bundles called cerebellar peduncles.
The cerebellum compares the intended movement programmed by motor areas in the cerebrum with what is happening. It constantly reaieves sensory input from the tendons and joints, recptors for equilibrium, and the recptors of the eyes. The cerebellum helps our skeletal muscles (these are the muscles that let us move) to contract smoothely. The cerebellum is the main brain region that makes all skilled movement possible.
Damage to the cerebellum through truama or diseases creates symptoms involving skeletal muscles . The left side of the body would be affected if the right side of the brain is damaged. And vice versa. There may be lack of muscle coordination, called ataxia (a = without ; taxis = order). Blindfolded people with ataxia cannot touch the tip of their nose with a finger because they cannot coordinate movement with their sense of where a body part is located. Another sign of ataxia is changed speech pattern due to uncoordinated speech muscles. Cerebellar damage may also result in difficulty in walking and severe dizziness. Alcohol inhibits the cerebellum and individuals who consume too much alcohol show signs of ataxia.

Back to Looking at the Cerebrum Next on to Cranial nerves