| PNF | proprioceptive neuromuscular facilitation |
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| PSD | Presynaptic dendrites |
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| LTF | Long term facilitation |
| PPF | Paired pulse facilitation |
| PSF | post-spike facilitation |
| PNF | Proprioceptive Neuromuscular Facilitation |
| Wedensky facilitation | The arrival of an impulse at a blocked zone, enhancing the excitability of the nerve beyond the block and indicating that the neuromuscular preparation distal to the block has been changed even though the enhancing stimulus is not conducted through the blocked zone. (05 Mar 2000) |
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| social facilitation | Any enhancement of a motivated behaviour in which individuals do the same thing with some degree of mutual stimulation and consequent coordination. (12 Dec 1998) |
| facilitation | <physiology> Greater effectiveness of synaptic transmission by successive presynaptic impulses, usually due to increased transmitter release. (18 Nov 1997) |
| receptors, presynaptic | Neurotransmitter receptors located on or near presynaptic terminals or varicosities. Presynaptic receptors which bind transmitter molecules released by the terminal itself are termed autoreceptors. (12 Dec 1998) |
| presynaptic | <anatomy, physiology> Situated proximal to a synapse or occurring before the synapse is crossed. (05 Mar 1998) |
| presynaptic cell | <physiology> In a chemical synapse, the cell that releases neurotransmitter that will stimulate the postsynaptic cell. <neurology> In an electrically synapsed system, the cell that has the first action potential, but since synapses are rectifying, one of the two cells involved is always presynaptic. (05 Mar 1998) |
| presynaptic membrane | That part of the plasma membrane of an axon terminal that faces the plasma membrane of the neuron or muscle fibre with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon's plasma membrane. See: synapse. (05 Mar 2000) |
| presynaptic receptor | <physiology> Receptors located on presynaptic terminals at synapses. (05 Mar 1998) |
| presynaptic terminals | The distal terminations of axons which are specialised for the release of neurotransmitters. Also included are varicosities along the course of axons which have similar specializations and also release transmitters. Presynaptic terminals in both the central and peripheral nervous systems are included. (12 Dec 1998) |
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