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Related Experiment Videos

Age related signal decrease in functional magnetic resonance imaging during motor stimulation in humans.

V Hesselmann1, O Zaro Weber, C Wedekind

  • 1Department of Radiology, University of Cologne, Joseph-Stelzmann-Strasse 9, 50924, Cologne, Germany. volker.hesselmann@medizin.uni-koeln.de

Neuroscience Letters
|August 2, 2001
PubMed
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Functional magnetic resonance imaging (fMRI) reveals that blood oxygen level dependent (BOLD) signal intensity decreases with age in healthy adults. This age-related decline in BOLD contrast should be considered in clinical fMRI applications.

Area of Science:

  • Neuroimaging
  • Functional Magnetic Resonance Imaging (fMRI)
  • Human Physiology

Background:

  • Functional magnetic resonance imaging (fMRI) is a key tool for studying brain activity.
  • Understanding factors influencing fMRI signal, such as age, is crucial for accurate interpretation.
  • Previous research has not fully elucidated age-related changes in motor cortex activation using BOLD contrast.

Purpose of the Study:

  • To investigate the effect of age on blood oxygen level dependent (BOLD) signal changes in the motor cortex during finger tapping.
  • To determine if age-related declines in BOLD signal are significant in healthy adults.

Main Methods:

  • Healthy right-handed volunteers (n=86) underwent fMRI on a 1.5 Tesla scanner.
  • Blood oxygen level dependent (BOLD) images were acquired using a 3D multi-shot echo-planar imaging sequence with echo-shifting.

Related Experiment Videos

  • Motor stimulation involved right-hand finger tapping; activation maps were analyzed for signal intensity and cluster size.

    • Main Results:

    • A significant decrease in absolute and relative BOLD signal intensity differences was observed with increasing age in the whole group and the male subgroup.
    • Correlation analysis indicated a negative, though non-significant, trend in the female subgroup.
    • Age-related decline in BOLD contrast is a likely explanation for the observed signal decrease.

    Conclusions:

    • Functional magnetic resonance imaging (fMRI) demonstrates an age-related decline in BOLD signal contrast during motor tasks.
    • This finding has important implications for the interpretation of fMRI data in clinical settings, particularly when assessing age-related neurological changes.
    • Consideration of age-related BOLD signal changes is recommended for robust clinical fMRI applications.