Cerebellum - Cerebellum The cerebellum only makes up a...

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Cerebellum The cerebellum only makes up a small part of the overall volume of the brain, but contains 50% of the total neurons in the brain area. It is important in motor coordination. It receives information from the somatosensory receptors and from the motor cortex and compares the two. Thus, it "looks" at where the body actually is (from incoming sensory input) and compares it to where the brain "thinks" it is (outgoing motor output), and makes any necessary adjustments. Alcohol and other drugs depress the cerebellum resulting in a condition known as ataxia . Medulla Oblongata The oldest parts of the brain are contained in the brainstem. The medulla oblongata is the most inferior portion of the brainstem and contains ascending and descending nerve tracts. Specialized nuclei in the medulla control the rate and force of the heart beat (cardiac center), blood vessel diameter (vasomotor center), and rate and depth of breathing (respiratory center).
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