Cognition and consciousness arise from analog computations, says new theory
The brain's ability to generate quick, nimble volitional thought — and a unified awareness of thought and experience — arises from analog computations carried out by electrical waves, MIT neuroscientists argue in a new review.
A recently published theory in The Journal of Neuroscience by researchers from MIT's Picower Institute for Learning and Memory proposes that cognition and consciousness emerge from the brain's use of traveling waves of rhythmic neural activity to coordinate nimble neural networks with analog computations. The lead author, Earl K. Miller, a Picower Professor, explains that while the brain's physical circuits are crucial for storing memories and representing goals, the brain requires a control system to process information rapidly in response to constantly changing sensory input.
This control system, consisting of brain waves, allows millions of neurons to work together to perform computations more efficiently than through the slow process of synapse rewiring. Miller and his colleagues argue that brain waves, which are the synchronized fluctuations of large groups of neurons, are essential for coordinating and performing computations.
The theory asserts that the brain's use of waves in spatiotemporal computing, where waves can add and subtract to enable analog computations, is an important factor in consciousness. Consciousness, according to the theory, emerges when these dynamic wave patterns bring the cortex to a globally integrated state that links and influences widespread activity.
This theory not only explains cognition and consciousness but also suggests potential clinical applications, as waves can be manipulated non-invasively.
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