Jump to ContentJump to Main Navigation
A Short Guide to Brain ImagingThe Neuroscience of Human Cognition$
Users without a subscription are not able to see the full content.

Richard E. Passingham and James B. Rowe

Print publication date: 2015

Print ISBN-13: 9780198709138

Published to Oxford Scholarship Online: November 2015

DOI: 10.1093/acprof:oso/9780198709138.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2020. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 02 July 2020

Functional systems

Functional systems

Chapter:
(p.91) Chapter 6 Functional systems
Source:
A Short Guide to Brain Imaging
Author(s):

Richard E. Passingham

James B. Rowe

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198709138.003.0006

The different areas of the brain do not work in isolation. Instead they operate as integrated systems. These systems can be identified because areas within the same system have a similar, though not identical, pattern of connections. Because the areas are also interconnected, the activations of areas within a system tend to covary over time, whether the subject is at rest or engaged in a task. Thus the different systems can be identified on the basis of the degree to which they covary or are activated independently. There are two aims in studying functional systems. One is to identify the nature of information that flows from one area to another. The other is to characterize the causal structure of the system. Several methods are available to do this, and these have been particularly useful for studying top-down effects, as in the voluntary control of attention.

Keywords:   functional systems, resting-state covariance, graph theory, psychophysiological interactions, structural equation modeling, dynamic causal modeling, top-down effects, flow of information

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .