The Brain Essay Research Paper The Brain

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The Brain Essay, Research Paper The Brain Can you image a hunk of pinkish-gray tissue the size of your hand that is controlling your entire body? This organ in your body is called the brain. The brain is not the largest organ but is the most complex organ in your body. (Metos, 1990, p. 10 ) When you think of the brain do you think of the control center of movement, sleep, hunger, thirst, and virtually every other vital activity necessary to survive? Or do you think of the brain as the organ that controls emotions including, hate, love, fear, sadness, mourning, ect.? I really doubt you would think of that unless you were an anthropologist, a scientist who studies humans? ( Funk & Wagnalls Corporation, 1995, Encarta Encyclopedia. ) As a matter of fact, the brain weights

about 1.3 kilograms or about 3 pounds, that is in males, because there thick headed, but in females it weights about 10% less and contains 10 to 15 billion nerve cells. ( Metos,1990, pg. 10. ) These nerve cells are all linked together, they are responsible for the control of all the mental functions. Also from the outside of the human brain, which I doubt any of us will ever see in person, looks like it?s divided into three parts, which it is, the first part is the cerebrum, the second part is the cerebellum, and the last part is the brain stem. The three parts of the brain are very complex and have many little parts in them. The first part of the human brain is the cerebrum and is the largest part. It weighs about 85% of the 3 pounds. The second part of the human brain is the

cerebellum, which is in the posterior, or the hind part of the brain. The cerebellum is the center of which reflex, for coordination. The third part is the most complex, the brain stem is made up of six different parts. The first part of the brain stem is the thalamus, which lies in the middle of the brain. This controls all sensory input to the brain, except for smell, connected to the thalamus is the hypothalamus which lies in the middle at the base of the brain. This part of the brain stem controls the body functions that are necessary to survive: eating, drinking, temperature regulation, sleep, emotional behavior, and sexual activity. The third part of the brain stem is the midbrain, which is explanatory. The forth part is the pons, which is located between the medulla and

the midbrain, and is directly in front of the cerebellum. The fifth part of the brain stem is the medulla, which is between the spinal cord and the pons. This sections looks like a pyramid shaped structure and controls the center of cardiac vasoconstriction and respiratory functions, also the reflex activities, including vomiting. If you damage this part of your brain stem it will cause immediate death. The sixth and final part of the brain stem is the limbic system. The limbic system is portions of the thalamus, hypothalamus, hippocampal formation, amygdala, caudate nucleus, septum, and the mesencephalon. ( Funk & Wagnalls Corporation, 1995, Encarta Encyclopedia. ) What do you think could kill you , a physical injury or a complex chemical imbalance to the brain? Well,

neither one of them could hurt you as bad as a Brain Disorder! Brain disorders are very serious, they can kill you or give you other serious problems that could cause your body to breakdown. For example, if you get a blow to the head you might be dizzy or maybe make you unconscious for a minute or two but if the blow is more serious you could possibly go into a concussion which would leave no permanent damage maybe just a little memory loss. ( Funk & Wagnalls, 1995, Encarta Encyclopedia.) Speaking of memory loss, memory lose is natural in humans. For example on this T.V. Show I saw that a 25, and 76 year old man all have different ranges in memory. Your probably thinking that the older man, who is 76 years old had the least memory, well, your right and the 25 year old had the