| GnRH | Gonadotropin Releasing Hormone [HP 1898, 2034] = LHRH = Go... |
|---|---|
| GAN | giant axon neuropathy |
| MA | malignant arrhythmia; management and administration; mandelic acid; masseter; Master of Arts; matern... |
| QSART | quantitative sudomotor axon reflex testing |
| Q-SART | Quantitative Sudomotor Axon Reflex Test |
|---|---|
| MGA | medial giant axon |
| axon | <cell biology> A long process of a neuron, that carries efferent (outgoing) action potentials from the cell body towards target cells. Each nerve cell has one axon, which can be over a foot long. A nerve cell communicates with another nerve cell by transmitting signals from the branches at the end of its axon. At the terminal end of the axon, the impulses are transmitted to other nerve cells or to effector organs. In the peripheral nervous system, the larger (myelinated) axons are surrounded by a myelin sheath formed by concentric layers of plasma membrane of the schwann cell. In the central nervous system, the function of the schwann cell is supplied by oligodendrocytes (oligodendroglia). See: dendrite. (03 Jul 1999) |
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| axon degeneration | A type of peripheral nerve fibre response to insult, wherein axon death and subsequent breakdown occurs, with secondary breakdown of the myelin sheath associated; caused by focal injury to peripheral nerve fibres; often referred to as wallerian degeneration. Synonym: axon degeneration. (05 Mar 2000) |
| axon hillock | <cell biology> Tapering region between a neuron's cell body and its axon. This region is responsible for summating the graded inputs from the dendrites and producing action potentials if the threshold is exceeded. (12 Mar 1998) |
| axon loss polyneuropathy | A type of polyneuropathy in which axon degeneration is the sole/predominant feature; many aetiologies, particularly toxic and metabolic; on nerve conduction studies, affects amplitudes of the responses, but does not cause conduction slowing or block. Synonym: axonal polyneuropathy. (05 Mar 2000) |
| axon reflex | An effect brought about by the passage of the nerve impulses from a sensory ending to the effector organ along divisions of the nerve fibre without traversing a synapse, e.g., as in the vasodilation resulting from stimulation of the skin or the irritation of the conjunctiva; the reaction occurs even when the nerve fibre has been sectioned and thus isolated from the nervous centres. (05 Mar 2000) |
| axon terminals | The somewhat enlarged, often club-shaped endings by which axons make synaptic contacts with other nerve cells or with effector cells (muscle or gland cells). As isolated, by homogenizing brain or spinal cord, they contain acetylcholine and the related enzymes. Terminals contain neurotransmitters of various kinds, sometimes more than one. These can be demonstrated by chemical analysis and immunocytochemical methods. See: synapse. Synonym: axonal terminal boutons, end-feet, neuropodia, pieds terminaux, synaptic boutons, synaptic endings, synaptic terminals, terminal boutons, bouton terminaux. (05 Mar 2000) |
| axonal | Pertaining to an axon. (05 Mar 2000) |
| axonal degeneration | A type of peripheral nerve fibre response to insult, wherein axon death and subsequent breakdown occurs, with secondary breakdown of the myelin sheath associated; caused by focal injury to peripheral nerve fibres; often referred to as wallerian degeneration. Synonym: axon degeneration. (05 Mar 2000) |
| axonal guidance | <cell biology> General term for mechanisms that ensure correct projections by nerve cells in developing and regenerating nervous systems. Implies accurate navigation by growth cones, the highly motile tips of growing neuronal processes. See: growth cone collapse. (12 Mar 1998) |
| axonal polyneuropathy | A type of polyneuropathy in which axon degeneration is the sole/predominant feature; many aetiologies, particularly toxic and metabolic; on nerve conduction studies, affects amplitudes of the responses, but does not cause conduction slowing or block. Synonym: axonal polyneuropathy. (05 Mar 2000) |
| axonal process | An obsolete term for axon. (05 Mar 2000) |
| axonal terminal boutons | The somewhat enlarged, often club-shaped endings by which axons make synaptic contacts with other nerve cells or with effector cells (muscle or gland cells). As isolated, by homogenizing brain or spinal cord, they contain acetylcholine and the related enzymes. Terminals contain neurotransmitters of various kinds, sometimes more than one. These can be demonstrated by chemical analysis and immunocytochemical methods. See: synapse. Synonym: axonal terminal boutons, end-feet, neuropodia, pieds terminaux, synaptic boutons, synaptic endings, synaptic terminals, terminal boutons, bouton terminaux. (05 Mar 2000) |
| axonal transport | Directed transport of organelles and molecules along a nerve cell axon. Transport can be anterograde (from the cell body) or retrograde (toward the cell body). (alberts et al., molecular biology of the cell, 3d ed, pg3) (12 Dec 1998) |
| axoneme | <cell biology> The central microtubule complex of eukaryotic cilia and flagella with the characteristic 9 + 2 arrangement of tubules when seen in cross-section. (12 Mar 1998) |
| axonin | <protein> Chick homologue of TAG 1. (18 Nov 1997) |
| giant axon | <biology> Extraordinarily large unmyelinated axons found in invertebrates. Some, like the squid giant axon, can approach 1 mm diameter. Large axons have high conduction speeds, the giant axons are invariably involved in panic or escape responses and may (e.g. Crayfish) have electrical synapses to further increase speed. Vertebrate axons with high conduction velocites are much narrower: they are myelinated, allowing saltatory conduction. (17 Dec 1997) |
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| cervix of the axon | The constricted portion of the axon just before the myelin sheath begins. (05 Mar 2000) |
| squid giant axon | <physiology> Large axons, up to 1mm in diameter, that innervate the mantle of the squid. Because of their large size, many of the pioneering investigations of the mechanisms underlying resting and action potentials in excitable cells were done on these fibres. (10 Mar 1998) |
Synonyms : Axoplasmic Streaming, Axonal Transports, Axoplasmic Flows, Axoplasmic Transports, Streaming, Axoplasmic, Transport, Axonal, Transport, Axoplasmic, Transports, Axonal, Transports, Axoplasmic
Synonyms : Axon
| axonal |
of or relating to or resembling an axon
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| axone |
axon: long nerve fiber that conducts away from the cell body of the neuron
Ãâó: wordnet.princeton.edu/perl/webwn
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| axon |
long nerve fiber that conducts away from the cell body of the neuron
Ãâó: wordnet.princeton.edu/perl/webwn
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| axon reflex |
a reflex resulting from a stimulus applied to one branch of a nerve which sets up an impulse that moves centrally to the point of division of the nerve where it is reflected down the other branch to the effector organ.
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| axonal |
An axon, or "nerve fiber," is a long slender projection of a nerve cell, or "neuron," which conducts electrical impulses away from the neuron's cell body or soma. Axons are in effect the primary transmission lines of the nervous system, and as bundles they help make up nerves. Individual axons are microscopic in diameter--typically about one micrometre across-- but may extend to macroscopic lengths. ...
Ãâó: en.wikipedia.org/wiki/Axonal
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| axon | long nerve fiber that conducts away from the cell body of the neuron |
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| axon | (neuroscience) of or relating to or resembling an axon |
| axon | long nerve fiber that conducts away from the cell body of the neuron |
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