The mind is not produced by the entire brain working uniformly. Instead, mind-making is a highly selective process: some brain regions play no role, some contribute only partially, and a smaller set carries out most of the work. Within this core group, some regions create detailed images, while others generate more basic but essential experiences, such as bodily feelings.
A Selective Brain Network
The regions involved in making the mind do not operate in isolation. They show highly differentiated patterns of interconnection, pointing to extremely complex signal integration across the brain.
Cortical mind-making regions are clusters of interlocked areas organised around the entry points for signals from the body’s sensory systems. Subcortical regions, made up of nuclei, are similarly tightly connected and are organised around signals arising from the body itself.
Why Connections Matter
Mind-making depends not only on particular brain areas but also on how those areas communicate. Massive interconnectivity allows signals to move in loops rather than only in one direction. This recursive signalling means that information returns to the regions where processing began, creating repeated rounds of cross-communication.
In the cortex, this complexity is amplified by interlocking between the cortex and the thalamus. Cortical regions also receive inputs from nuclei in the brain stem and thalamus, which modulate activity through neuromodulators such as catecholamines and neurotransmitters such as glutamate.
Timing and Coordination
The brain must also preserve timing. Features of a stimulus that arrive together at a sensory probe need to remain together as they are processed inside the brain.
For this to happen, small neural circuits behave in particular ways. Neurons may increase their firing rates to signal the presence of a feature, while larger groups of neurons synchronise their firing when representing a combination of features.
Beyond the “Map”
The idea of a brain map as a separate, fixed entity is only a useful abstraction. In reality, each region contains vast numbers of neural connections, producing immense signalling complexity.
What we experience as a mental state is therefore not simply activity in one discrete brain area. It emerges from recursive signalling across multiple regions. At the same time, certain contents of the mind—such as a particular face or voice—are likely assembled in specific collections of brain regions suited to map-making, with support from other areas. Mind-making thus has both global complexity and a degree of anatomical specificity.
The Brain’s Focus on the Body
The brain’s deepest business is managing life, and managing life means managing the body. Neurons act on other cells through chemical messages or by exciting muscles, but they also need continuous information from the body they regulate. This creates a two-way relationship between brain and body.
In simpler brains, the body signals mainly to subcortical nuclei, which hold a kind of dispositional know-how rather than detailed representations. In complex brains, the cerebral cortex maps the body in explicit detail, allowing a person to imagine the shape and position of their limbs, or to register that an elbow hurts or the stomach feels uneasy.
This ability to bring the body into the mind is a central expression of the brain’s “aboutness”—its built-in orientation toward the body it manages.
How the World Reaches the Mind
The brain’s connection to the body also shapes how we perceive the external world. The body’s perceptual devices—the eyes, ears, skin, and smell and taste systems—are located in the body, even though they occupy special positions.
Each of these devices combines an outer, physical structure with delicate neural probes. The external ear, ear canal, middle ear, and parts of the eye provide the physical framework, while structures such as the cochlea and retina act as neural probes. Together, they form a body border through which signals from the world must pass before reaching the brain.
Because of this arrangement, the external world is never known by the brain directly. The body and environment interact, the body changes, and those changes are mapped in the brain. The mind learns about the world through the brain, but the brain itself is informed through the body.
The Roots of Self and Feeling
By mapping the body in an integrated way, the brain creates a crucial component of the self. Body mapping is therefore central to understanding consciousness.
This close relationship between body and brain also helps explain spontaneous bodily feelings, emotions, and emotional feelings. The mind does not float free of the body; it is built through the brain’s continuous, detailed, and reciprocal engagement with it.
Source : Self Comes to Mind: Constructing the Conscious Brain by António Damásio
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