morphology of HRV waveforms covaries with differentemotional experiences.Following the logic of this general relationship, we can thus use the six psychophysiologicalmodes to construct a typologya conceptual mapshowing the expected relationshipbetween different categories of subjective emotional experience and the different patterns ofphysiological activity associated with them (see Figure 4). This general theoretical schemeapplies to normal, healthy individuals experiencing emotions and feelings of relatively shortduration (minutes to hours).Figure 4. Graphic depiction of everyday states and hyper-states of psychophysiologicalinteraction distinguished by the typology. Two qualitatively different categories ofpsychophysiological interaction are depictedthe area within the inner circle represents theINTEGRAL REVIEWDecember 2009Vol. 5, No. 2range of emotional experience of normal, everyday life; the area beyond the outer circlerepresents psychophysiological hyper-states of extreme emotional experience. Thepsychophysiological transition from one region to another involves an abrupt phase transition,which is depicted graphically by the white space between the two circles. Two dimensionsdifferentiate the varieties of emotional experience shown; for simplification, the relevantpsychological and physiological variables are superimposed on the axis for each dimension. Onedimension is the degree of emotional arousal (vertical axis, high to low)known to be covariantwith ANS balance. The second dimension is the valence of the emotion (horizontal axis, positiveor negative)assumed covariant with the degree of activation of the hypothalamic-pituitary-adrenal (HPA) axis. Different patterns of HRV are predicted from the particular combination ofarousal and valence values on the two dimensions. Within the inner circle are six segments, eachof which demarcates a range of emotion experienced in everyday life. Typical HRV patternsassociated with each emotion are shown. The area beyond the outer circle depicts six hyper-states, in which intense emotional experience drives the activity of physiological systems pastnormal function into extreme modes. The known and predicted HRV waveform patternsassociated with these hyper-states are also shown. The labels Depletion and Renewal, on theleft and right-hand side of the diagram, respectively, highlight the relationship between thevalence of feelings and emotions experienced and the psychophysiological consequences for theindividual. Negative emotional states can lead to emotional exhaustion and depletion ofphysiological reserves. By contrast, positive emotional states are associated with increasedpsychophysiological efficiency and regeneration.Although the mapping is not isomorphic between data and concept, the typology provides acompelling and fruitful way of conceptualizing and organizing these phenomena. In addition tooffering some understanding of the relationships between different types of emotional experienceand their associated physiological processes, this scheme also aims to predict the distinguishingphysiological correlates of emotional states that, to our knowledge, have yet to be empiricallydescribed.The typology distinguishes between two general classes of psychophysiological interaction.One class reflects normal psychophysiological states associated with the variety of subjectiveexperiences of everyday life. This area is represented by the space within the inner circle shownin Figure 4. This area has been divided into six segments, each representing a different basicrange of emotion. The second class is a qualitatively different category of psychophysiologicalinteraction associated with extreme emotional experience, represented by the space beyond theouter perimeter of the circle in the figure. Because the patterns of psychophysiologicalinteraction in this space are predicted to show an abrupt movementa phase shiftfrompatterns associated with feelings typically experienced in everyday life to qualitatively distinctpsychophysiological patterns