Inside Interoception: The hidden sense of how you feel inside

The human brain processes an estimated 11 million bits of sensory information per second, with only a small fraction, approximately 10 to 60 bits per second, reaching conscious awareness. This filtering mechanism allows the brain to manage the overwhelming influx of data from senses like touch, sight, and hearing, enabling it to focus on relevant information for survival and action. Moriah Thomason, a neuroscientist at NYU Langone, highlights this as a crucial evolutionary adaptation for successful functioning. While much of this processing occurs unconsciously, certain internal bodily states, such as hunger pangs, nervousness-induced sweating, or even the awareness of one's own heartbeat, can enter conscious perception. Scientists refer to this internal sense of the body's state as interoception. The term "interoception" was first introduced in 1906 by British neurophysiologist Charles Sherrington. For much of the 20th century, the concept remained primarily within specialized scientific circles, particularly neurophysiology. The ability to sense these internal bodily signals is fundamental to our subjective experience of emotions and well-being, influencing our decisions and how we navigate the world. The brain's capacity to interpret these internal cues allows for a sophisticated understanding of our physiological needs and emotional states, contributing to a holistic sense of self. This complex interplay between internal signals and conscious awareness is a cornerstone of human perception and behavior.