Our Brains Have Two Minds: One 'Analogue' and One 'Digital'

Our sense of self may not arise from high-level thought, but from a more fundamental 'feeling mind'. This perspective suggests consciousness is grounded in homoeostatic feelings—the brain’s awareness of the body's internal balance, such as hunger, thirst, or wellbeing.

This system, which scientists call interoception, operates using a unique physiology. It relies on unmyelinated or lightly myelinated nerve fibres, especially in pathways like the vagus nerve. Lacking heavy insulation, these neurons engage in slow, continuous, 'analogue-like' signalling, directly interfacing with the body's chemical environment.

This stands in stark contrast to the 'modern mind' responsible for reasoning, language, and processing the external world. Its heavily myelinated neurons enable rapid, precise, 'digital-like' signals, much like a computer. This foundational, analogue feeling process provides the constant, subjective background that underpins consciousness itself, enabling the adaptive behaviour needed for survival.