trigger zone

a low-threshold region for eliciting a response. In a neuron, the trigger zone for evoking an action potential is the axon hillock, where postsynaptic potentials summate. In the brain, stimulation of the chemoreceptor trigger zone in the medulla oblongata provokes vomiting.

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Psychology term of the day

May 8th 2024

perceptual development

the acquisition of skills that enable a person to organize sensory stimuli into meaningful entities during the course of physical and psychological development.