Central Nervous System

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The Central Nervous System
Deanna Pharr
Lincoln University Online

There are four divisions of the brain; Brainsten that consist of the Medulla oblongata, Pons and the midbrain, the Cerebellum, Diencephalon that consist of the Hypothalamus and the Thalamus, and the Cerebrum. Brainstem is the stem like portion of the brain that connects the brain to the spinal cord. Ten of the twelve cranial nerves originate from the brain stem.

Medulla oblongata is located between the pons and the spinal cord. It plays a role in controlling respiration, heart rate, and blood pressure. It is enlarged, upward extension of the spinal cord. It lies just inside the cranial cavity above the large hole in the occipital bone called foramen magnum. As with the spinal cord, the medulla, bits of grey and white matter, but the arrangement differ in the two organs. In the medulla, bits of gray matter mix closely and intricately with white matter to form the reticular formation. In the spinal cord, gray and white matters do not intermingle: gray matter forms the interior core of the cord and the white matter surrounds it. The function is a Two-way conduction pathway between the spinal cord and higher brain centers: cardiac, respiratory, and vasomotor control center. Pons bridges the cerebrum with the cerebrum and the brainstem. The function is a two-way conduction between the areas of the brain and other regions of the body: influences respiration. Midbrain is the most superior portion of the brain .It is approximately 2cm long and it forms a major part of the brain stem, the function is a two-way conduction pathway: relay for visual and auditory impulses

Cerebellum is also called the hind brain. It is located under the posterior portion of the cerebrum. Cerebellum maintains balance and assists in the coordination of the skeletal muscles. The cerebellum is the second largest part of the human brain. It lies under the occipital lobe of the cerebrum. The function is the...
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