Emotion in man as tested by the delta index of the electroencephalogram: I

Research on electroencephalogram to measure thermal pleasure in thermal alliesthesia in temperature step-change environment

“…Whereas theta power has mainly been addressed as it relates to sleeping and drowsy states, meditation, and cognitive activity including perceptual processing, problem solving, and working memory, some other studies correlate theta power to either strong focused attention or pleasant emotional . These two correlations offer explanations for why theta power increased in participants in the current study.…”

Electroencephalography and physiological psychology: evaluation and statement of problem.

“…These early clinical studies did not relate the stimulus to the central state. In later work this group of investigators studied the effects of complex stimulation ("emotional probing") eliciting complex responses upon the production of slower than alpha (delta) frequencies (28). The correlations were made upon a group of normal subjects and a group of psychopathic patients.…”

Psychological and psychophysiological significance of the electroencephalogram.

“…Alpha waves occur with greatest prominence in conditions of waking relaxation, decreasing either as a person goes to sleep or as mental activity is increased (38,52). They range from 7 to 14 per second, depending primarily on the age (65,86,108) and metabolic level (56,67,72,87,101,104,111); they are the highest normal waking potentials recordable from the outside of the skull; and they tend to be strongest in occipital regions (1,2,65,71,72,85,103). Beta low potential fast activity from 18 to 40 per second, tends to be more prominent in frontal regions (71, 72, 103) and typically displaces waking alpha activity during increased 'tension' or excitation (9,16,33,52,62,75,76,88,110,112).…”