generator potential

gen·er·a·tor po·ten·tial

local depolarization of the membrane potential at the end of a sensory neuron in graded response to the strength of a stimulus applied to the associated receptor organ, for example, a pacinian corpuscle; if the generator potential becomes large enough (because the stimulus is at least of threshold strength), it causes excitation at the nearest node of Ranvier and a propagated action potential.

generator potential

the nonconducted electrical charge that is developed when the sensitive part of a RECEPTOR is stimulated. The magnitude of the potential depends on the intensity of the stimulus, and when it reaches a certain threshold it may give rise to an ACTION POTENTIAL.
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Limited Tenders are invited for Procurement Of Generator Potential Transformer For Avr & Protection
Light produces a depolarizing generator potential and an increase in spike activity in both type A and B photoreceptors (Dennis, 1967; Alkon and Fuortes, 1972).
Rotation or gravity causes the statoconia to press against the motile cilia of hair cells in front of the centrifugal or gravitational force vector, resulting in a depolarizing generator potential and an increase in spike activity (Alkon, 1975).
Rotation of the statocyst has been shown to be an adequate stimulus for evoking depolarizing generator potentials and an increase in spike activity in Hermissenda hair cells (Alkon, 1975).
Generator potential responses induced by light flashes of constant duration but increasing intensity were recorded extracellularly from the epistellar body photoreceptors of the octopus, Eledone cirrhosa [ILLUSTRATION FOR FIGURE 6A OMITTED].
As already seen for the extracellular compound generator potentials, the time-to-peak depolarization for individual photoreceptor cells decreased with increasing stimulus intensity [ILLUSTRATION FOR FIGURE 10C OMITTED].
While perfusing the slice with modified Limulus Ringer (first trace), the light flash evoked a burst of [approximately]7 action potentials at the leading edge of the generator potential, followed by 34 action potentials yielding a steady-state firing rate of [approximately]4.5 impulses/s for the last 4 s of the response.
The decrease in steady state response, from 4.0 to 0 impulses/s, was associated with a partial hyperpolarization of the generator potential from 10 to 5 mV depolarization.
He covers cellular processes, cell membranes, channels and control of membrane potential, sensory generator potentials, action potentials, synapses and muscles, and includes a practice examination with answers.
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