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The Central Nervous System By: Chase Lewis Central Nervous System There are two main parts of the central nervous system. The brain is the control center. The spinal cord is the main highway. The nerves (neurons) are the signal carriers. The Brain facts The brain is the control center of the body. The average adult human brain weighs 3 pounds. The brain contains about 100 billion nerve cells. Your brain is about 2% of your total body weight but uses 20% of your body's energy. The energy used by the brain is enough to light a 25 watt bulb. Parts of The Brain The Frontal Lobe is the primary command and control center of your brain. It is responsible for reasoning and problem solving. It can also be involved in motor control and memory. The Parietal Lobe helps to process pain and touch sensation. It is also involved in thinking. Parts of The Brain The Temporal Lobe helps to process sound and language. It is also involves emotion, memory and speech. The Occipital Lobe involves vision and processing. Parts of The Brain The Pons help control automatic body functions. The Cerebellum helps with controlling movement. It helps to control posture, balance, and helps people to learn movement. Parts of The Brain The Cerebrum is the most highly developed part of the human brain. It is here that things like imagination, thought, judgment, and decision occur. The Brainstem is the region of the brain that connects the cerebrum with the spinal cord. Motor and sensory neurons travel through the brainstem allowing for the relay of signals between the brain and the spinal cord. The Spinal Cord The spinal cord is the main pathway for information connecting the brain and peripheral nervous system. A pair of spinal nerves leaves each segment of the spinal cord. The length of the spinal cord is about 45 cm in men and 43 cm in women. Parts of The Spinal Cord The Cervical Nerves are responsible for relaying messages and ensuring functioning to different body parts. C1-C7 controls the head, diaphragm, upper body muscles, wrist , triceps, and hand. Thoracic spine refers to the upper- and middle-back. T1-T12 controls the chest and abdomen muscles. It is built for stability and plays an important role in holding the body upright and providing protection for the vital organs in the chest. Parts of The Spinal Cord Lumbar spine has no spinal cord and is made up of a large amount of space for the nerve roots. L1-L5 controls the leg muscles. Sacral nerve is located at the bottom of the spine. S1-S5 control the bladder, sex functions and bowels. Webliography http://www.spine-health.com http://www.brainhealthandpuzzles.c om http://faculty.washington.edu/chudle r/spinal.html http://biology.about.com/od/ http://kidshealth.org/kid/htbw/brain. html http://www.cognifit.com/brain-parts