Neuromodulatory Influences on Integration and Segregation in the Brain.

Affiliation

Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia. Electronic address: [Email]

Abstract

Cognitive function relies on the dynamic cooperation of specialized regions of the brain; however, the elements of the system responsible for coordinating this interaction remain poorly understood. In this Opinion article I argue that this capacity is mediated in part by competitive and cooperative dynamic interactions between two prominent metabotropic neuromodulatory systems - the cholinergic basal forebrain and the noradrenergic locus coeruleus (LC). I assert that activity in these projection nuclei regulates the amount of segregation and integration within the whole brain network by modulating the activity of a diverse set of specialized regions of the brain on a timescale relevant for cognition and attention.

Keywords

acetyl choline,integration,neural gain,neuromodulation,noradrenaline,segregation,