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RECEPTION [ MESSENGERS ( THE NERVOUS SYSTEM ) ]

RECEPTION [ MESSENGERS ( THE NERVOUS SYSTEM ) ] A healthy brain needs a constant stream of incoming information. Picture what happens without it: When volunteers enter a sensory deprivation tank a body temperature pool of water in which they are forced to go without sights, sounds, smells, tastes, and skin sensations they begin to…

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THE AUTONOMIC NERVOUS SYSTEM / TWO BRANCHES

THE AUTONOMIC NERVOUS SYSTEM / TWO BRANCHES THE AUTONOMIC NERVOUS SYSTEM Much of what the brain does takes place beyond our ability to sense it-or appreciate it. In the midbrain’s pons and medulla lie the centers that regulate the vital, everyday functions of life. Think about it: How fortunate you are that you don’t have…

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THE CEREBRAL CORTEX [ HARMONY ( THE NERVOUS SYSTEM ) ]

THE CEREBRAL CORTEX [ HARMONY ( THE NERVOUS SYSTEM ) ] THE CEREBRAL CORTEX Seven-tenths of the volume of the human nervous system lies in the cerebral cortex. Given that the human cortex is many times larger than that of any other creature, scientists are convinced its huge size is the main source of what…

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PHRENOLOGY [ THE NERVOUS SYSTEM ( HARMONY ) ]

PHRENOLOGY [ THE NERVOUS SYSTEM ( HARMONY ) ] PHRENOLOGY As A SCHOOLBOY of nine, Franz Joseph Gall (1758-1828) was intrigued by a classmate with large, protruding eyes and a knack for rote memorization. The student’s appearance and skills made a lasting impression, one that years later Gall would trace to his theory of cortical…

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THE NERVOUS SYSTEM [ IN HARMONY ]

THE NERVOUS SYSTEM WHETHER IT BE a surprise, a startle, or a scare, how the brain reacts to a situation is determined by the information that is gathered by the nervous system.Through this vast interconnected network, the brain is able to collect data, interpret them, and then react to them in a matter of milliseconds-…

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FIRST GLIMPSE / A BETTER LOOK / COMPUTERIZED VISIONS [ THE AMAGING BRAIN ]

FIRST GLIMPSE / A BETTER LOOK / COMPUTERIZED VISIONS [ THE AMAGING BRAIN ] FIRST GLIMPSE The first technology to peer into the brain was the x-ray, invented by Wilhelm Rontgen (1845-1923) in 1895. The German scientist discovered a form of radiation that could penetrate the body; the rays were absorbed by dense bones, which…

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OUTSIDE LOOKING IN [ THE AMAGING BRAIN ]

OUTSIDE LOOKING IN [ THE AMAGING BRAIN ] Scientists have long Dreamed of Exammmg how the brain works within a living body. The problem, though, was figuring out how to get inside the head without causing injury or even death. Doctors treating wounds from wars and accidents have been able to get glimpses of living…

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ANATOMY [ DIFFERENT PARTS & DIFFERENT RESPONSIBILITIES ( THE AMAZING BRAIN ) ]

ANATOMY [ DIFFERENT PARTS & DIFFERENT RESPONSIBILITIES ( THE AMAZING BRAIN ) ] FOUR DIVISIONS Moving inward, we come to the organ itself. The brain may appear to be a Ulllform mass of folded, pink tissue. But a closer look reveals different lobes, regions, structures, and parts that all help regulate body functions, interpret information…

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NERVE CELLS – LIFE SPAN [ THE AMAZING BRAIN ]

NERVE CELLS – LIFE SPAN [ THE AMAZING BRAIN ] Amazingly, the cells that perform the complicated ballet of electrochemical transmission can live more than a hundred years, but they do not get replaced like most other body cells. Except for the hippocampus and the olfactory bulb, where new neurons have been shown to grow…

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NEURON COMMUNICATIONS/NEURON TRANSMITTERS [ NERVE CELLS ( THE AMAZING BRAIN ) ]

NEURON COMMUNICATIONS/NEURON TRANSMITTERS [ NERVE CELLS ( THE AMAZING BRAIN ) ] NEURON COMMUNICATIONS Tim Berners-Lee, a creator of the World Wide Web, likens the brain’s complexity to the nearly infinite capacity for Web sites to connect to each other. “A piece of information is really defined only by what it’s related to,” he said….