词汇 | hyperpolarization |
释义 | BETA Examples of hyperpolarizationhyperpolarization isn’t in the Cambridge Dictionary yet. You can help! The hyperpolarization was largest when stimulus spots approximated the size of the receptive-field center, and diminished substantially for larger spots. A tonic hyperpolarization underlying contrast adaptation in cat visual cortex. Contribution of the hyperpolarization-activated current to the resting membrane potential of rat nodose sensory neurons. Gain control and hyperpolarization level in cat horizontal cells as a function of light and dark adaptation. Depolarization and (in this cell) hyperpolarization reduce time constant. Dotted line marks the peak level of hyperpolarization reached during the first response. Although a small decrease in hyperpolarization was also obtained using current steps, it was much weaker than that evoked by thalamic stimuli. Note the decrease in evoked hyperpolarization upon repetitive stimulation. Subsequent voltage clamp experiments confirmed the activation of an inward current upon hyperpolarization. This explains the fact that the amplitude of the sag and its apparent rate of decay increase with an increase in the depth of hyperpolarization. Again there is a contrary behavior of transient hyperpolarization and afterpotential. This is broadly consistent with the present evidence that in alpha cells the maximum hyperpolarization for nonpreferred contrast steps is evoked by relatively small stimuli. First, ionic considerations make it unlikely that direct glycinergic inhibition of the alpha cell alone could produce the observed hyperpolarization. We attempted to solve the issue concerning intrinsic versus synaptic factors by mimicking the stimulus-evoked hyperpolarization with a similar event evoked by current pulses. Very small hyperpolarization-activated currents were observed in type 2 cells. |
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