Find over 25,000 psychological definitions


deep sleep

the stage of the sleep cycle in which arousal thresholds are highest and consciousness is taken to be least likely. In electroencephalography, deep sleep is commonly defined by a predominance of slow, high-amplitude waveforms. See delta wave; slow-wave sleep.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

January 30th 2025

mammillothalamic tract

mammillothalamic tract

the tract that connects the mammillary bodies to the thalamus at the base of the brain.