Stage 1 sleep

the initial stage of NREM sleep, which is characterized by low-amplitude brain waves (4–6 Hz) of irregular frequency, a slow heart rate, and reduced muscle tension. See sleep stages.

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Psychology term of the day

November 17th 2024

entorhinal cortex

a region of cerebral cortex in the ventromedial portion of the temporal lobe. It has reciprocal connections with the hippocampal formation and various other cortical and subcortical structures and is an integral component of the medial temporal lobe memory system. It is also involved in spatial navigation. Lesions in this area are used to study neural plasticity and working memory; they are also seen in temporal lobe epilepsy and the early stages of Alzheimer’s disease.