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Nervous System Essay

706 words - 3 pages

The Central Nervous System
The central nervous system consists of the brain and spinal cord.The brain is made of three main parts: the forebrain, midbrain, and hindbrain. The forebrain consists of the cerebrum, thalamus, and hypothalamus .The midbrain consists of the tectum and tegmentum. The hindbrain is made of the cerebellum, pons and medulla. Most the time the midbrain, pons, and medulla are called to go together as the brainstem.The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action. The cerebral cortex is divided into four sections, called lobes , the frontal lobe, parietal lobe, occipital lobe, and temporal ...view middle of the document...

As for the spinal cord,the spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the brain ,the medulla oblongata specifically. The brain and spinal cord together make up the central nervous system. The spinal cord begins at the Occipital bone and extends down to the space between the first and second lumbar vertebrae it does not extend the entire length of the vertebral column. It is around 45 cm in men and around 43 cm long in women.The spinal cord functions primarily in the transmission of neural signals between the brain and the rest of the body but also contains neural circuits that can independently control numerous reflexes and central pattern generators. The spinal cord has three major functions.Serve as a conduit for motor information, which travels down the spinal cord.Serve as a conduit for sensory information, which travels up the spinal cord.Serve as a center for coordinating certain reflexes.The spinal cord is the main pathway for information connecting the brain and peripheral nervous system. The length of the spinal cord is much shorter than the length of the bony spinal column. The human spinal...

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