Behavioral and Brain Sciences

Short Communication

Low-dimensional versus high-dimensional chaos in brain function – is it an and/or issue?

Márk Molnár a1
a1 Department of Psychophysiology, Institute for Psychology, Hungarian Academy of Sciences, Budapest. POB 398 H-1394, Hungary


We discuss whether low-dimensional chaos and even nonlinear processes can be traced in the electrical activity of the brain. Experimental data show that the dimensional complexity of the EEG decreases during event-related potentials associated with cognitive effort. This probably represents increased nonlinear cooperation between different neural systems during sensory information processing.