| nerve deafness | Neural deafness, former terms for sensorineural deafness. (05 Mar 2000) |
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| nerve decompression | Release of pressure on a nerve trunk by the surgical excision of constricting bands or widening of a bony canal. (05 Mar 2000) |
| nerve degeneration | 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. (12 Dec 1998) |
| nerve ending | <physiology> A connection between excitable cells, by which an excitation is conveyed from one to the other. 1. Chemical synapse: one in which an action potential causes the exocytosis of neurotransmitter from the presynaptic cell, which diffuses across the synaptic cleft and binds to ligand gated ion channels on the post synaptic cell. These ion channels then affect the resting potential of the post synaptic cell. 2. Electrical synapse: one in which electrical connection is made directly through the cytoplasm, via gap junctions. 3. Rectifying synapse: one in which action potentials can only pass across the synapse in one direction (all chemical and some electrical synapses). 4. Excitatory synapse: one in which the firing of the presynaptic cell increases the probability of firing of the postsynaptic cell. 5. Inhibitory synapse: one in which the firing of the presynaptic cell reduces the probability of firing of the postsynaptic cell. (10 Jan 1998) |
| nerve endings | Specialised terminations of peripheral neurons. Nerve endings include neuroeffector junction(s) by which neurons activate target organs and sensory receptors (see receptors, sensory) which transduce information from the various sensory modalities and send it centrally in the nervous system. Presynaptic nerve endings are presynaptic terminals. (12 Dec 1998) |
| nerve fascicle | A bundle of nerve fibres surrounded by perineurium. (05 Mar 2000) |
| nerve fibre | The axon of a nerve cell, ensheathed by oligodendroglia cells in brain and spinal cord, and by Schwann cells in peripheral nerves. (05 Mar 2000) |
| nerve fibres | Slender processes of neurons, especially the prolonged axons that conduct nerve impulses. (12 Dec 1998) |
| nerve fibres, myelinated | Grayish white nerve fibres whose axons are encased in a myelin sheath which may in turn be enclosed by a neurilemma (a thin membrane spirally enwrapping the myelin layers). (12 Dec 1998) |
| nerve field | The regional distribution of nerve terminals. (05 Mar 2000) |
| nerve force | An obsolete terms denoting the property of nerve tissue to conduct stimuli. (05 Mar 2000) |
| nerve graft | A nerve, or part of a nerve, used as a graft. (05 Mar 2000) |
| nerve growth cone | <cell biology> A specialised region at the tip of a growing neurite that is responsible for sensing the local environment and moving toward the neuron's target cell. Growth cones are hand shaped, with several long filopodia that differentially adhere to surfaces in the embryo. Growth cones can be sensitive to several guidance cues, for example: surface adhesiveness, growth factors, neurotransmitters and electric fields (galvanotropism). (18 Nov 1997) |
| nerve growth factor | <growth factor> A peptide (13.26 kD) of 118 amino acids (usually dimeric) with both chemotropic and chemotrophic properties for sympathetic and sensory neurons. Found in a variety of peripheral tissues, nerve growth factor attracts neurites to the tissues by chemotropism, where they form synapses. The successful neurons are then protected from neuronal death by continuing supplies of nerve growth factor. It is also found at exceptionally high levels in snake venom and male mouse submaxillary salivary glands, from which it is commercially extracted. Nerve growth factor was the first of a family of nerve tropic factors to be discovered. Amino acids 1-81 show homology with proinsulin. Besides its peripheral actions, nerve growth factor selectively enhances the growth of cholinergic neurons that project to the forebrain and that degenerate in Alzheimer's disease. Acronym: NGF (18 Nov 1997) |
| nerve growth factor antiserum | An antiserum containing antibodies against nerve growth factor; when injected into newborn animals the majority of sympathetic ganglion cells are permanently destroyed, resulting in hypoinnervation of peripheral tissues. Synonym: NGF antiserum. (05 Mar 2000) |
Synonyms : Growth-Associated Proteins, Neuronal, Neuronal Growth-Associated Proteins, Neuronotrophic Factors, Neurotrophic Protein, Neurotrophic Proteins, Proteins, Neuronal Growth-Associated, Factors, Nerve Growth, Factors, Neurite Outgrowth, Factors, Neuronotrophic
Synonyms : Nerve Nets, Net, Nerve, Nets, Nerve, Network, Neural (Anatomic), Networks, Neural (Anatomic), Neural Network (Anatomic)
Synonyms : Nerve Regenerations, Regeneration, Nerve, Regenerations, Nerve
Synonyms : MPNST, Neoplasms, Nerve Sheath, Nerve Sheath Tumors, Nerve Sheath Tumors, Peripheral, Peripheral Nerve Sheath Tumors, Malignant, Tumors of the Nerve Sheath, MPNSTs, Neoplasm, Nerve Sheath, Nerve Sheath Neoplasm, Perineuriomas
Synonyms : Nerve Tissues, Tissue, Nerve, Tissues, Nerve
| nervous |
easily agitated; "quick nervous movements" anxious: causing or fraught with or showing anxiety; "spent an anxious night waiting for the test results"; "cast anxious glances behind her"; "those nervous moments before takeoff"; "an unquiet mind" of or relating to the nervous system; "nervous disease"; "neural disorder" aflutter: excited in anticipation skittish: unpredictably excitable (especially of horses)
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| nervous breakdown |
a severe or incapacitating emotional disorder
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| nervous prostration |
nervous exhaustion: an emotional disorder that leaves you exhausted and unable to work
출처: wordnet.princeton.edu/perl/webwn
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| Nerium |
one species: oleander
출처: wordnet.princeton.edu/perl/webwn
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| nervous system |
the sensory and control apparatus consisting of a network of nerve cells
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| NER | any bundle of nerve fibers running to various organs and tissues of the body |
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| NER | get ready for something difficult or unpleasant |
| NER | anesthesia of an area supplied by a nerve |
| NER | anesthesia of an area supplied by a nerve |
| NER | a cell that is specialized to conduct nerve impulses |
| NER | a cluster of nerve cells governing a specific bodily process |
| NER | a cluster of nerve cells governing a specific bodily process |
| NER | harmful pressure on a nerve (especially in nerves that pass over rigid prominences) |
| NER | hearing loss due to failure of the auditory nerve |
| NER | the terminal structure of an axon that does not end at a synapse |
| NER | the terminal structure of an axon that does not end at a synapse |
| NER | repeated and long-term nerve compression (usually in nerves near joints that are subject to inflammation or swelling) |