miniature end plate potential


miniature end plate potential
(= MEPP)
Small fluctuations (typically 0.5 mV) in the resting potential of postsynaptic cells. They are the same shape as, but much smaller than, the end plate potentials caused by stimulation of the presynaptic cell. MEPPs are considered as evidence for the quantal release of neurotransmitters at chemical synapses, a single MEPP resulting from the release of the contents of a single synaptic vesicle.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • End-plate potential — Miniature end plate potentials and end plate spikes recorded from muscle fiber End plate potentials (EPPs) (sometimes called end plate spikes ) are the depolarizations of skeletal muscle fibers caused by neurotransmitters binding to the… …   Wikipedia

  • end-plate potential — ▪ physiology       chemically induced change in electric potential of the motor end plate, the portion of the muscle cell membrane that lies opposite the terminal of a nerve fibre at the neuromuscular junction. The end plate membrane is… …   Universalium

  • end plate potential — Depolarization of the sarcolemma as a result of acetylcholine release from the motoneuron causing an influx of sodium ions. The end plate potential is the sum of quantal miniature end plate potentials. Development of the end plate potential is… …   Dictionary of molecular biology

  • postsynaptic potential — In a synapse, a change in the resting potential of a postsynaptic cell following stimulation of the presynaptic cell. For example, in a cholinergic synapse, the release of acetylcholine from the presynaptic cell causes channels to open in the… …   Dictionary of molecular biology

  • Excitatory postsynaptic potential — In neuroscience, an excitatory postsynaptic potential (EPSP) is a temporary depolarization of postsynaptic membrane potential caused by the flow of positively charged ions into the postsynaptic cell. They are the opposite of inhibitory… …   Wikipedia

  • MEPP — miniature end plate potential …   Medical dictionary

  • MEPP — • miniature end plate potential …   Dictionary of medical acronyms & abbreviations

  • muscle — muscleless, adj. muscly, adj. /mus euhl/, n., v., muscled, muscling, adj. n. 1. a tissue composed of cells or fibers, the contraction of which produces movement in the body. 2. an organ, composed of muscle tissue, that contracts to produce a… …   Universalium

  • G-MEPP — giant miniature end plate potential …   Medical dictionary

  • G-MEPP — • giant miniature end plate potential …   Dictionary of medical acronyms & abbreviations


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