Cause and effect: how drugs change the brain.Drugs of abuse cause changes in the brain that affect the way the drug user thinks and feels. Remember, some of these brain changes may last forever! The human brain may make new connections around damaged portions, but once killed, brain cells are gone forever. After reading "Drugs Change Your Brain," pick up a pencil and draw a line connecting each drug, below, to the effect it has on the brain. Then, in the blank beside each effect, write the part of the brain that's affected. Choose your answer from the box at the bottom of the page. BRAIN PART word choices: Hippocampus hippocampus fabulous marine creature; half fish, half horse. [Rom. Myth. and Art: Hall, 154] See : Monsters Brain blood supply Myelin sheath myelin sheath n. The insulating envelope of myelin that surrounds the core of a nerve fiber or axon and that facilitates the transmission of nerve impulses, formed from the cell membrane of the Schwann cell in the peripheral nervous system and from on neurons Brain stem brain stem, lower part of the brain, adjoining and structurally continuous with the spinal cord. The upper segment of the human brain stem, the pons, contains nerve fibers that connect the two halves of the cerebellum. Cerebral cortex cerebral cortex Layer of gray matter that constitutes the outer layer of the cerebrum and is responsible for integrating sensory impulses and for higher intellectual functions. |
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