Table 1.

Glossary.

Term	Description
Exteroception	The perception of environmental stimuli originating outside of the body, e.g., visual, acoustic, or tactile stimuli.
Interoception	The perception of the body's internal state through the processing of signals arising from within the body, e.g., blood pressure, heart beats, etc. Interoceptive features may reflect the emotional valence, arousal and other somatic states.
Valence	One of the most commonly described dimensions of emotions that ranges from highly positive to highly negative according to how pleasant or unpleasant a stimulus might be.
Arousal	The activation dimension that ranges from calm to excitement.
Valence-overload	A condition that occurs when a stimulus or a cue is simultaneously associated to different, sometimes contradictory, valences.
Valence-overload interference	A decrement in the ability of a memory system to reliably remember previously formed associations between exteroceptive stimuli and their emotional valences.