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Transcranial Doppler and Lower Extremity Function in Older Adults: Einstein Aging Study.

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Reduced blood flow velocity in cerebral arteries is linked to poorer lower extremity function and balance in older adults. This suggests cerebral hemodynamics impacts physical performance in aging populations.

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Area of Science:

  • Neurology
  • Gerontology
  • Vascular Biology

Background:

  • Cerebral blood flow is crucial for brain function.
  • Age-related changes in cerebral hemodynamics may affect physical performance.
  • Understanding these links can inform interventions for older adults.

Purpose of the Study:

  • To investigate the association between cerebral artery mean blood flow velocity (MBFV) and lower extremity function in older adults.
  • To determine if TCD ultrasound measures correlate with gait speed, balance, and strength.

Main Methods:

  • Cross-sectional study of 200 community-dwelling older adults (aged 70+) without dementia.
  • Transcranial Doppler (TCD) ultrasound measured MBFV in anterior (MCA) and posterior (VA, BA) cerebral circulation.
  • Lower extremity function assessed via gait speed, unipedal stance time (balance), and chair rise time (strength).

Main Results:

  • Lower MBFV in the middle cerebral artery (MCA) correlated with slower gait speed and chair rise time.
  • Reduced MBFV in vertebral (VA) and basilar (BA) arteries was associated with poorer balance (shorter unipedal stance time).

Conclusions:

  • Diminished cerebral blood flow velocity in both anterior and posterior circulation is associated with impaired lower extremity function and balance in older adults.
  • These findings highlight the potential role of cerebral hemodynamics in age-related physical performance decline.