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Related Experiment Videos

Age-related differences in movement representation.

S Hutchinson1, M Kobayashi, C M Horkan

  • 1Neuroimaging Laboratory, Department of Neurology, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA.

Neuroimage
|December 25, 2002
PubMed
Summary
This summary is machine-generated.

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Older adults show different brain activation patterns during repetitive movements compared to younger adults. This highlights the need for age-matched controls in neurological studies using functional magnetic resonance imaging (fMRI).

Area of Science:

  • Neuroscience
  • Human Physiology
  • Medical Imaging

Background:

  • Repetitive movements are common motor activation tasks in neurological disorder research.
  • Age-related changes in cortical activation patterns during motor tasks are not fully understood.
  • The necessity of age-matched control groups in functional imaging studies requires investigation.

Purpose of the Study:

  • To investigate age-related differences in cortical activation patterns during simple repetitive movements.
  • To determine the importance of age-matched control groups in functional neuroimaging studies.
  • To explore how age influences brain activity during motor tasks.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to study 16 healthy right-handed subjects (8 young, 8 old).

Related Experiment Videos

  • Subjects performed repetitive motor tasks (index finger abduction/adduction, wrist extension/flexion) and a rest condition.
  • fMRI data were processed and analyzed using SPM '99 for between-group comparisons.

    • Main Results:

    • Younger adults showed greater activation in contralateral primary sensorimotor and premotor cortex.
    • Older adults exhibited greater activation in caudal supplementary motor area and ipsilateral sensorimotor cortex.
    • Age-related differences were more pronounced for index finger movements and with the non-dominant hand in older adults.

    Conclusions:

    • Significant age-related differences exist in cortical activation patterns during repetitive movements.
    • Older adults may employ compensatory recruitment of motor cortical units.
    • Findings underscore the importance of age-matched controls in functional imaging studies of neurological disorders in older populations.