hyperpolarization


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Related to hyperpolarization: hypopolarization, Graded potential

hyperpolarization

 [hi″per-po″ler-ĭz-a´shun]
any increase in the amount of electrical charge separated by the cell membrane and hence in the strength of the membrane potential. In cardiology this is the process by which an electrical fiber, at the end of phase 3 repolarization, becomes more negative than usual.

hy·per·po·lar·i·za·tion

(hī'pĕr-pō'lăr-i-zā'shŭn),
An increase in polarization of membranes of nerves or muscle cells; the reverse change from that associated with excitatory action.

hyperpolarization

/hy·per·po·lar·iza·tion/ (hi″per-po″ler-ĭ-za´shun) any increase in the amount of electrical charge separated by the cell membrane, and hence in the strength of the transmembrane potential.

hy·per·po·lar·i·za·tion

(hī'pĕr-pō'lăr-ī-zā'shŭn)
An increase in polarization of membranes of nerves or muscle cells, which makes the cell less sensitive to any stimulus; the reverse change from that associated with excitatory action.

hyperpolarization

A change in the value of the resting membrane potential towards a more negative value. The inside of the cell becomes more negative than the outside. Hyperpolarization is inhibitory because the membrane potential moves away from the neuron's threshold at which an action potential could occur. Example: the retinal photoreceptor potentials when stimulated by light. See depolarization; receptor potential; resting membrane potential; synapse.

hy·per·po·lar·i·za·tion

(hī'pĕr-pō'lăr-ī-zā'shŭn)
Increased polarization of membranes of nerves or muscle cells.

hyperpolarization

an increase in the amount of electrical charge on either side of a cell membrane so that there is an increase in the electric potential across the membrane.
References in periodicals archive ?
In contrast, the light-evoked hyperpolarization of type [I.
Phase Activity, Alternation of Activation and Inhibition of Neuron Firing as a Result of Alternation of Depolarization and Hyperpolarization of the Neuron Soma
I'm sure that there is a very large potential for introducing a 1T permanent magnet MRI system in the fields of contrast agent usage and development of hyperpolarization applications.
By activation of GABA[sub]AR situated in postsynaptic membranes, the influx of Cl[sup]− flows into cells along electrochemical gradients, which can subsequently induce hyperpolarization and suppress the release of excitatory neurotransmitters.
When it is given intrathecally it produces analgesia by depressing the release C-fiber excitatory nociceptive transmitters (Glutamate and substance P) and by hyperpolarization of post synaptic dorsal horn neurons.
11] Their analgesic action is a result of depression of the release of C-fiber transmitters and hyperpolarization of postsynaptic dorsal horn neurons.
2011) also reported that microtubule cytoskeleton is reformed during apoptosis, and apoptotic microtubule network persists during apoptosis, which coincides with cycles of mitochondrial hyperpolarization.
Membrane potentials responded to HQ exposure by an initial hyperpolarization (0-6 mV), followed by a larger depolarization (0-65 mV).
This would increase the influx of chloride ions, leading to hyperpolarization of cells, preventing depolarization that would, in turn, decrease DA release.
Putative SMNs fired in strong bursts, triggered by periodic waves of depolarization that alternated with periods of intense hyperpolarization.
org), Bruker BioSpin introduces HyperQuant[TM], a bench-top NMR reader for precisely quantifying both the magnetic hyperpolarization as well as the thermal polarization of a sample.