Brain Topography

, Volume 30, Issue 1, pp 77–86 | Cite as

Somatosensory Brain Function and Gray Matter Regional Volumes Differ According to Exercise History: Evidence from Monozygotic Twins

  • Pekka Hautasaari
  • Andrej M. Savić
  • Otto Loberg
  • Eini Niskanen
  • Jaakko Kaprio
  • Urho M. Kujala
  • Ina M. TarkkaEmail author
Original Paper


Associations between long-term physical activity and cortical function and brain structure are poorly known. Our aim was to assess whether brain functional and/or structural modulation associated with long-term physical activity is detectable using a discordant monozygotic male twin pair design. Nine monozygotic male twin pairs were carefully selected for an intrapair difference in their leisure-time physical activity of at least three years duration (mean age 34 ± 1 years). We registered somatosensory mismatch response (SMMR) in EEG to electrical stimulation of fingers and whole brain MR images. We obtained exercise history and measured physical fitness and body composition. Equivalent electrical dipole sources of SMMR as well as gray matter (GM) voxel counts in regions of interest indicated by source analysis were evaluated. SMMR dipolar source strengths differed between active and inactive twins within twin pairs in postcentral gyrus, medial frontal gyrus and superior temporal gyrus and in anterior cingulate (AC) GM voxel counts differed similarly. Compared to active twins, their inactive twin brothers showed greater dipole strengths in short periods of the deviant-elicited SMMR and larger AC GM voxel counts. Stronger activation in early unattended cortical processing of the deviant sensory signals in inactive co-twins may imply less effective gating of somatosensory information in inactive twins compared to their active brothers. Present findings indicate that already in 30′s long-term physical activity pattern is linked with specific brain indices, both in functional and structural domains.


Twin research Brain electrophysiology Somatosensory cortex Mismatch negativity Brain structure Physical activity 



Authors wish to thank the participants of the study and laboratory personnel and students at the University of Jyväskylä who contributed to this study. Support from the Juho Vainio Foundation (Helsinki) is acknowledged (to I M Tarkka). Data collection in the twin cohort has been supported by National Institute of Alcohol Abuse and Alcoholism (Grants AA-12502, AA-00145, and AA-09203 to R J Rose) and the Academy of Finland (Grants 100499, 265240, 263278 and 264146 to J Kaprio).


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Pekka Hautasaari
    • 1
  • Andrej M. Savić
    • 2
    • 3
  • Otto Loberg
    • 4
  • Eini Niskanen
    • 5
  • Jaakko Kaprio
    • 6
    • 7
    • 8
  • Urho M. Kujala
    • 1
  • Ina M. Tarkka
    • 1
    Email author
  1. 1.Department of Health SciencesUniversity of JyväskyläJyväskyläFinland
  2. 2.School of Electrical EngineeringUniversity of BelgradeBelgradeSerbia
  3. 3.Tecnalia Serbia Ltd.BelgradeSerbia
  4. 4.Department of PsychologyUniversity of JyväskyläJyväskyläFinland
  5. 5.Department of Applied PhysicsUniversity of Eastern FinlandKuopioFinland
  6. 6.Department of Public HealthUniversity of HelsinkiHelsinkiFinland
  7. 7.National Institute for Health and WelfareHelsinkiFinland
  8. 8.Institute for Molecular Medicine (FIMM)University of HelsinkiHelsinkiFinland

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