If the sum of the stimuli reaches a certain voltage, known as the threshold potential, depolarization continues from the axon hillock down the axon.
12.
They soon discovered that at threshold potential, the inward and outward currents, of sodium and potassium ions respectively, were exactly equal and opposite.
13.
When a certain threshold potential is reached, the spiral ganglion neuron fires an action potential, which enters the auditory processing pathway of the brain.
14.
Most often, the threshold potential is a membrane potential value between 50 and 55 hyperpolarize the cell and thus inhibit threshold from being reached.
15.
Furthermore, it can be used to identify characteristics of significant medical conditions through comparing the effects of those conditions on threshold potential with the effects viewed experimentally.
16.
As various drugs and other factors act on the resting potential and bring it closer to the threshold potential, an action potential is more easily and rapidly obtained.
17.
Likewise, when the sodium channels are in a state of greater activation, then the influx of sodium ions that allows the membrane to reach threshold potential occurs more readily.
18.
At this stage, end-plate potentials ( EPPs ) can still be detected, but are too small to reach the threshold potential needed for activation of muscle fiber contraction.
19.
With patch clamp recording, an analogous state was replicated " in vitro " in rat cortical neurons after induction of febrile body temperatures; a notable decrease in threshold potential was observed.
20.
Each excitable patch of membrane has two important levels of membrane potential : the resting potential, which is the value the membrane potential maintains as long as nothing perturbs the cell, and a higher value called the threshold potential.
