Robert Plutchik - emotional wheel as innate continuum of human emotions, depicting eight basic emotions and their blends.
Emotion is result of specific relationships between people and their environment.
Fifteen primary emotions Physiology of Emotion Autonomic nervous system involved in emotional responses and consists of two parts. Parasympathetic division - actively involved in maintaining relaxed, calm, unemotional state. Sympathetic division - responsible for physiological responses to stress. Pupils of eyes dilate. Heart rate and blood pressure elevated.