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Related Concept Videos

Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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Related Experiment Video

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Association Between Accelerometer-Derived Physical Activity Measurements and Brain Structure: A Population-Based

Fabienne A U Fox1, Kersten Diers1, Hweeling Lee1

  • 1From the Population Health Sciences (F.A.U.F., H.L., M.M.B.B., N.A.A.), German Center for Neurodegenerative Diseases (DZNE), Bonn; Image Analysis (K.D., M.R.), German Center for Neurodegenerative Diseases (DZNE), Bonn; Institute for Medical Biometry (A.M., M.M.B.B.), Informatics and Epidemiology (IMBIE), Faculty of Medicine, University of Bonn, Germany; A.A. Martinos Center for Biomedical Imaging (M.R.), Massachusetts General Hospital, Boston; Department of Radiology (M.R.), Harvard Medical School, Boston, MA; and Department of Neurology (N.A.A.), Faculty of Medicine, University of Bonn, Germany.

Neurology
|August 2, 2022
PubMed
Summary
This summary is machine-generated.

Physical activity, measured objectively, is linked to better brain structure, including larger brain volumes and thicker cortex. Benefits are most pronounced at lower activity levels and vary by age and sex, suggesting tailored exercise for brain health.

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Area of Science:

  • Neuroscience
  • Public Health
  • Gerontology

Background:

  • Growing evidence suggests physical activity benefits neuronal health.
  • Studies on physical activity and brain morphology remain inconclusive.
  • Objective quantification of physical activity is needed to clarify its impact on brain structure.

Purpose of the Study:

  • To examine the relationship between objectively quantified physical activity and brain morphology (volume, cortical thickness, gray matter density).
  • To identify molecular pathways potentially mediating the effects of physical activity on brain structure.
  • To investigate how age and sex influence the association between physical activity and brain morphology.

Main Methods:

  • Utilized baseline data from 2,550 participants in a prospective cohort study.
  • Measured physical activity dose and intensity using accelerometers.
  • Assessed brain structure via 3T MRI scans and analyzed relationships using multivariable regression, adjusting for covariates.

Main Results:

  • Physical activity dose and intensity were independently associated with larger brain volumes, gray matter density, and cortical thickness.
  • The most significant effects of physical activity on brain volume were observed at lower activity levels.
  • Strongest effects were noted in motor regions and cortical areas enriched for genes involved in mitochondrial respiration, with variations across age and sex.

Conclusions:

  • Physical activity positively impacts brain health, particularly in motor and high-oxidative-demand regions.
  • Light-intensity activities benefit older adults, while young adults may gain more from high-intensity exercise.
  • Regular physical activity and reduced sedentary time are crucial for preventing age-related brain atrophy and neurodegenerative diseases.