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Structures and functions of the brain

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´╗┐Osorio, Magaly November 22, 2012 Period: 5 The Brain The brain is very important in our bodies because it controls every part of our daily life, from breathing and blinking. It is located in the head and it has a whitish-pink appearance. It contains about one hundred billion neurons and weights about three pounds. It controls our organs in the body. The brain flashes messages out to all the other parts of the body. All of our thoughts and feelings are also controlled by the brain. The brain and spinal cord make up the central nervous system. The brain doesn't just control your organs, but also can think and remember. That part of the brain is called the mind. It consists of three major parts which are the cerebrum, the cerebellum, the brain stem. The cerebrum or the cortex is the largest part of the human brain. The cerebrum is divided into four sections which are the front lobe, parietal lobe, occipital lobe, and the temporal lobe. ...read more.


The hemispheres are separated from one another by a thin structure called the vermis, or "worm." The anterior lobe is the second oldest part of the cerebellum. It receives proprioceptive input from the spinal cord and controls the anti-gravity muscles of the body. The posterior lobe is the newest part of the cerebellum. It is involved in the coordination of muscle movement via the inhibition of involuntary movement.The flocculonodular lobe consists of the flocculi, the most ancient part of the cerebellum, and the nodulus, the narrowest and most inferior part of the vermis. This lobe is involved in the maintenance of equilibrium. The brainstem is located at the juncture of the cerebrum and the spinal column. It is anterior to the cerebellum. 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. ...read more.


Finally the third process is the retrieval of information that we have stored. We must locate it and return it to our consciousness. We also have two types of memory which are short term and long term memory. In short term memory it allows recall for a period of several seconds to a minute without rehearsal and its capacity is also very limited. Long-term memory can store much larger quantities of information for potentially unlimited duration It is always best to keep your brain healthy because everything we do, see, feel, smell and touch all originate in the brain. Without the brain the body couldn't function. For example your stomach wouldn't know when it was full or hungry if we didn?t have a brain. In order to maintain a healthy brain it is good to use them every day, challenge them with puzzles and brain teasers so we can have use of our brains as long as possible. Any damage to the brain does not only erase memories but also may deceive the brain. Without a brain you would be like a corpse. ...read more.

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