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State and Trait Components of Functional Connectivity: Individual Differences Vary with Mental State.

Publication ,  Journal Article
Geerligs, L; Rubinov, M; Cam-Can, ; Henson, RN
Published in: J Neurosci
October 14, 2015

UNLABELLED: Resting-state functional connectivity, as measured by functional magnetic resonance imaging (fMRI), is often treated as a trait, used, for example, to draw inferences about individual differences in cognitive function, or differences between healthy or diseased populations. However, functional connectivity can also depend on the individual's mental state. In the present study, we examined the relative contribution of state and trait components in shaping an individual's functional architecture. We used fMRI data from a large, population-based human sample (N = 587, age 18-88 years), as part of the Cambridge Centre for Aging and Neuroscience (Cam-CAN), which were collected in three mental states: resting, performing a sensorimotor task, and watching a movie. Whereas previous studies have shown commonalities across mental states in the average functional connectivity across individuals, we focused on the effects of states on the pattern of individual differences in functional connectivity. We found that state effects were as important as trait effects in shaping individual functional connectivity patterns, each explaining an approximately equal amount of variance. This was true when we looked at aging, as one specific dimension of individual differences, as well as when we looked at generic aspects of individual variation. These results show that individual differences in functional connectivity consist of state-dependent aspects, as well as more stable, trait-like characteristics. Studying individual differences in functional connectivity across a wider range of mental states will therefore provide a more complete picture of the mechanisms underlying factors such as cognitive ability, aging, and disease. SIGNIFICANCE STATEMENT: The brain's functional architecture is remarkably similar across different individuals and across different mental states, which is why many studies use functional connectivity as a trait measure. Despite these trait-like aspects, functional connectivity varies over time and with changes in cognitive state. We measured connectivity in three different states to quantify the size of the trait-like component of functional connectivity, compared with the state-dependent component. Our results show that studying individual differences within one state (such as resting) uncovers only part of the relevant individual differences in brain function, and that the study of functional connectivity under multiple mental states is essential to disentangle connectivity differences that are transient versus those that represent more stable, trait-like characteristics of an individual.

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Published In

J Neurosci

DOI

EISSN

1529-2401

Publication Date

October 14, 2015

Volume

35

Issue

41

Start / End Page

13949 / 13961

Location

United States

Related Subject Headings

  • Young Adult
  • Rest
  • Oxygen
  • Neurology & Neurosurgery
  • Neural Pathways
  • Middle Aged
  • Male
  • Magnetic Resonance Imaging
  • Individuality
  • Image Processing, Computer-Assisted
 

Citation

APA
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ICMJE
MLA
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Geerligs, L., Rubinov, M., Cam-Can, ., & Henson, R. N. (2015). State and Trait Components of Functional Connectivity: Individual Differences Vary with Mental State. J Neurosci, 35(41), 13949–13961. https://doi.org/10.1523/JNEUROSCI.1324-15.2015
Geerligs, Linda, Mikail Rubinov, Mikail Cam-Can, and Richard N. Henson. “State and Trait Components of Functional Connectivity: Individual Differences Vary with Mental State.J Neurosci 35, no. 41 (October 14, 2015): 13949–61. https://doi.org/10.1523/JNEUROSCI.1324-15.2015.
Geerligs L, Rubinov M, Cam-Can, Henson RN. State and Trait Components of Functional Connectivity: Individual Differences Vary with Mental State. J Neurosci. 2015 Oct 14;35(41):13949–61.
Geerligs, Linda, et al. “State and Trait Components of Functional Connectivity: Individual Differences Vary with Mental State.J Neurosci, vol. 35, no. 41, Oct. 2015, pp. 13949–61. Pubmed, doi:10.1523/JNEUROSCI.1324-15.2015.
Geerligs L, Rubinov M, Cam-Can, Henson RN. State and Trait Components of Functional Connectivity: Individual Differences Vary with Mental State. J Neurosci. 2015 Oct 14;35(41):13949–13961.

Published In

J Neurosci

DOI

EISSN

1529-2401

Publication Date

October 14, 2015

Volume

35

Issue

41

Start / End Page

13949 / 13961

Location

United States

Related Subject Headings

  • Young Adult
  • Rest
  • Oxygen
  • Neurology & Neurosurgery
  • Neural Pathways
  • Middle Aged
  • Male
  • Magnetic Resonance Imaging
  • Individuality
  • Image Processing, Computer-Assisted