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Nerve Agents
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D000067397 |
[A class of compounds that adversely affect the transmission of impulses through the NERVOUS SYSTEM.
] |
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Nerve Block
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D009407 |
[Interruption of NEURAL CONDUCTION in peripheral nerves or nerve trunks by the injection of a local anesthetic agent (e.g., LIDOCAINE; PHENOL; BOTULINUM TOXINS) to manage or treat pain.
] |
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Nerve Compression Syndromes
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D009408 |
[Mechanical compression of nerves or nerve roots from internal or external causes. These may result in a conduction block to nerve impulses (due to MYELIN SHEATH dysfunction) or axonal loss. The nerve and nerve sheath injuries may be caused by ISCHEMIA; INFLAMMATION; or a direct mechanical effect.
] |
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Nerve Crush
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D009409 |
[Treatment of muscles and nerves under pressure as a result of crush injuries.
] |
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Nerve Degeneration
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D009410 |
[Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways.
] |
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Nerve Endings
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D009411 |
[Branch-like terminations of NERVE FIBERS, sensory or motor NEURONS. Endings of sensory neurons are the beginnings of afferent pathway to the CENTRAL NERVOUS SYSTEM. Endings of motor neurons are the terminals of axons at the muscle cells. Nerve endings which release neurotransmitters are called PRESYNAPTIC TERMINALS.
] |
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Nerve Expansion
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D055164 |
[Procedures that stimulate nerve elongation over a period of time. They are used in repairing nerve tissue.
] |
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Nerve Fibers
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D009412 |
[Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.
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Nerve Fibers, Myelinated
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D009413 |
[A class of nerve fibers as defined by their structure, specifically the nerve sheath arrangement. The AXONS of the myelinated nerve fibers are completely encased in a MYELIN SHEATH. They are fibers of relatively large and varied diameters. Their NEURAL CONDUCTION rates are faster than those of the unmyelinated nerve fibers (NERVE FIBERS, UNMYELINATED). Myelinated nerve fibers are present in somatic and autonomic nerves.
, Type B fibers are the small myelinated fibers with a diameter up to 3 um and NEURAL CONDUCTION rates of 3-15 m/sec. They are mainly associated with the visceral autonomic nerves.
, Type A fibers are the myelinated fibers ranging from 1-22 um in diameter with NEURAL CONDUCTION rates of 5-120 m/sec. They are the typical myelinated fibers of spinal nerves. Type A fibers are further subdivided into alpha, beta, gamma, and delta fibers.
] |
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Nerve Fibers, Unmyelinated
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D036421 |
[A class of nerve fibers as defined by their nerve sheath arrangement. The AXONS of the unmyelinated nerve fibers are small in diameter and usually several are surrounded by a single MYELIN SHEATH. They conduct low-velocity impulses, and represent the majority of peripheral sensory and autonomic fibers, but are also found in the BRAIN and SPINAL CORD.
, Type C fibers are peripheral unmyelinated nerve fibers in which several AXONS are surrounded by a single Schwann cell (SCHWANN CELLS). They constitute more than half of the peripheral sensory nerve fibers as well as all the postganglionic autonomic fibers.
] |
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Nerve Growth Factor
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D020932 |
[NERVE GROWTH FACTOR is the first of a series of neurotrophic factors that were found to influence the growth and differentiation of sympathetic and sensory neurons. It is comprised of alpha, beta, and gamma subunits. The beta subunit is responsible for its growth stimulating activity.
] |
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Nerve Growth Factors
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D009414 |
[Factors which enhance the growth potentialities of sensory and sympathetic nerve cells.
] |
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Nerve Net
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D009415 |
[A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junction or joined to one another by cytoplasmic processes. In invertebrates, for example, the nerve net allows nerve impulses to spread over a wide area of the net because synapses can pass information in any direction.
] |
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Nerve Regeneration
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D009416 |
[Renewal or physiological repair of damaged nerve tissue.
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Nerve Sheath Neoplasms
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D018317 |
[Neoplasms which arise from nerve sheaths formed by SCHWANN CELLS in the PERIPHERAL NERVOUS SYSTEM or by OLIGODENDROCYTES in the CENTRAL NERVOUS SYSTEM. Malignant peripheral nerve sheath tumors, NEUROFIBROMA, and NEURILEMMOMA are relatively common tumors in this category.
] |
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Nerve Tissue
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D009417 |
[Differentiated tissue of the central nervous system composed of NERVE CELLS, fibers, DENDRITES, and specialized supporting cells.
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Nerve Tissue Proteins
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D009419 |
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Nerve Transfer
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D016067 |
[Surgical reinnervation of a denervated peripheral target using a healthy donor nerve and/or its proximal stump. The direct connection is usually made to a healthy postlesional distal portion of a non-functioning nerve or implanted directly into denervated muscle or insensitive skin. Nerve sprouts will grow from the transferred nerve into the denervated elements and establish contact between them and the neurons that formerly controlled another area.
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Nervous System
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D009420 |
[The entire nerve apparatus, composed of a central part, the brain and spinal cord, and a peripheral part, the cranial and spinal nerves, autonomic ganglia, and plexuses. (Stedman, 26th ed)
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Nervous System Autoimmune Disease, Experimental
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D020721 |
[Experimental animal models for human AUTOIMMUNE DISEASES OF THE NERVOUS SYSTEM. They include GUILLAIN-BARRE SYNDROME (see NEURITIS, AUTOIMMUNE, EXPERIMENTAL); MYASTHENIA GRAVIS (see MYASTHENIA GRAVIS, AUTOIMMUNE, EXPERIMENTAL); and MULTIPLE SCLEROSIS (see ENCEPHALOMYELITIS, AUTOIMMUNE, EXPERIMENTAL).
] |
