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Research Article

Spectral quality of light modulates emotional brain responses in humans

G. Vandewalle, S. Schwartz, D. Grandjean, C. Wuillaume, E. Balteau, C. Degueldre, M. Schabus, C. Phillips, A. Luxen, D. J. Dijk, and P. Maquet
PNAS first published October 25, 2010; https://doi.org/10.1073/pnas.1010180107
G. Vandewalle
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  • For correspondence: gilles.vandewalle@umontreal.ca pmaquet@ulg.ac.be
S. Schwartz
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D. Grandjean
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C. Wuillaume
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E. Balteau
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C. Degueldre
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M. Schabus
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C. Phillips
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A. Luxen
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D. J. Dijk
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P. Maquet
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  • For correspondence: gilles.vandewalle@umontreal.ca pmaquet@ulg.ac.be
  1. Edited by Bruce S. McEwen, The Rockefeller University, New York, NY, and approved September 24, 2010 (received for review July 15, 2010)

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Abstract

Light therapy can be an effective treatment for mood disorders, suggesting that light is able to affect mood state in the long term. As a first step to understand this effect, we hypothesized that light might also acutely influence emotion and tested whether short exposures to light modulate emotional brain responses. During functional magnetic resonance imaging, 17 healthy volunteers listened to emotional and neutral vocal stimuli while being exposed to alternating 40-s periods of blue or green ambient light. Blue (relative to green) light increased responses to emotional stimuli in the voice area of the temporal cortex and in the hippocampus. During emotional processing, the functional connectivity between the voice area, the amygdala, and the hypothalamus was selectively enhanced in the context of blue illumination, which shows that responses to emotional stimulation in the hypothalamus and amygdala are influenced by both the decoding of vocal information in the voice area and the spectral quality of ambient light. These results demonstrate the acute influence of light and its spectral quality on emotional brain processing and identify a unique network merging affective and ambient light information.

  • melanopsin
  • emotion processing
  • hypothalamus
  • functional MRI

Footnotes

  • 1To whom correspondence may be addressed. E-mail: gilles.vandewalle{at}umontreal.ca or pmaquet{at}ulg.ac.be.
  • Author contributions: G.V., S.S., D.G., D.J.D., and P.M. designed research; G.V. and C.W. performed research; D.G., E.B., C.D., M.S., C.P., and A.L. contributed new reagents/analytic tools; G.V. and P.M. analyzed data; and G.V., S.S., D.J.D., and P.M. wrote the paper.

  • The authors declare no conflict of interest.

  • This article is a PNAS Direct Submission.

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1010180107/-/DCSupplemental.

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Spectral quality of light modulates emotional brain responses in humans
G. Vandewalle, S. Schwartz, D. Grandjean, C. Wuillaume, E. Balteau, C. Degueldre, M. Schabus, C. Phillips, A. Luxen, D. J. Dijk, P. Maquet
Proceedings of the National Academy of Sciences Oct 2010, 201010180; DOI: 10.1073/pnas.1010180107

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Spectral quality of light modulates emotional brain responses in humans
G. Vandewalle, S. Schwartz, D. Grandjean, C. Wuillaume, E. Balteau, C. Degueldre, M. Schabus, C. Phillips, A. Luxen, D. J. Dijk, P. Maquet
Proceedings of the National Academy of Sciences Oct 2010, 201010180; DOI: 10.1073/pnas.1010180107
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