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Study either the most important points of the body structure and anatomy of the mind and primary anxious procedure, in addition to a number of the tactics for which the mind is liable: sleep, habit, laughter, and dreaming. Written with a mixture of curriculum-based information regarding the mind and the way it really works and high-interest subject matters skilled in lifestyle,
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Myelin is produced by cells called oligodendrocytes in the central nervous system, and by Schwann cells in the peripheral nervous system. 1 Nerve cells, or neurons, are often wrapped in a fatty substance known as myelin to increase the speed of transmission of nerve impulses. Within the nerve cell, the impulse travels down the axon where it is received by the dendrites of the cell body of an adjacent nerve cell. The Peripheral Nerve and Dorsal Root Ganglia Schwann cells form the myelin sheath around each axon, and are lined up in series along axons.
Monoamines are a group of neurotransmitters that possess a modified amino acid, and include serotonin, norepinephrine, and acetylcholine. Monoamines are not produced in either primary afferent fibers or in dorsal horn neurons, but rather in the brain where projections are sent down to the spinal cord that synapse on sensory neurons. , to permit or dampen sensory transmission. Serotonin (also known as 5-HT, after its chemical formula), can be found in the presynaptic terminals of descending raphaespinal fibers in the dorsal horn.
1). Similar to the plastic insulation that surrounds 27 28 Pain electrical wires, myelin prevents current leakage by providing a high resistance barrier on the outside of nerves. Myelin is produced by cells called oligodendrocytes in the central nervous system, and by Schwann cells in the peripheral nervous system. 1 Nerve cells, or neurons, are often wrapped in a fatty substance known as myelin to increase the speed of transmission of nerve impulses. Within the nerve cell, the impulse travels down the axon where it is received by the dendrites of the cell body of an adjacent nerve cell.