Science

Theoretical paper challenges existence of central decision-making region in the brain

A neuroscientist argues that conscious choices emerge from simultaneous sensorimotor interactions rather than a centralized cognitive controller.

Updated Aug 26, 2026 · 03:17 UTC1 reports

The short version

Indiana University professor Tom James published a paper arguing that human brains lack a localized, physical central decision-making system.
The paper challenges linear models of cognition, proposing instead that behavior arises from continuous, simultaneous interactions between perception, movement, the body, and the environment.
Researching this framework requires cognitive neuroscientists to shift toward experimental methods capable of capturing dynamic, concurrent sensorimotor processes.

Indiana University professor Tom James published 'Sensorimotor Mechanisms of Decisions and Actions' in the Journal of Cognitive Neuroscience.[ScienceDaily]
James's theoretical framework disputes the 'sandwich model' of cognition, which assumes behavior follows a linear sequence from sensory input to central cognitive decision to motor output.[ScienceDaily]
The paper posits that decisions are abstract nonphysical descriptions rather than physical neural mechanisms causing physical actions.[ScienceDaily]
James uses analogies such as center of mass, institutional descriptions, and simple wall-following robotics to illustrate how complex behavior can appear intentional without a central controller.[ScienceDaily]

The proposal remains a theoretical framework, and developing experimental methodologies to measure and capture simultaneous, interactive sensorimotor processes poses ongoing technical challenges.[ScienceDaily]