Self-reported health complaints result from a complex integration of interoceptive (bottom-up) information emerging from peripheral physiological activity with (top-down) perceptual-cognitive and affective processes. Interoceptive signals have to be sensed, perceived, attended to, appreciated and interpreted, put into language and expressed, mostly in a social context. In this article, we will discuss the role of perceptual and attentional processes, anticipation, symptom schemata and illness beliefs, emotion and personality, and memory processes. Their role may importantly influence the relationship between indicators of peripheral physiological activity and self-reported health complaints.
Interoception and Symptom PerceptionAlthough all self-reported health complaints are the result of processes in the brain, a general assumption is that they accurately reflect dysfunctional processes in the peripheral body. The afferent or sensory processes transmitting information from the body to the brain can be called interoception. However, although interoception and symptom perception are related processes, they are not the same.