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Assessment of Age-related Changes in Cognitive Functions Using EmoCogMeter, a Novel Tablet-computer Based Approach
Published on: February 14, 2014
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Effect of fluid intake on cognitive function in older individuals: A prospective study
Hideyuki Hoshi1, Yusuke Kakubari2, Emi Moriya3
1Precision Medicine Centre, Hokuto Hospital, Obihiro City, Hokkaido, Japan.
Plos One
|October 6, 2025
Summary
Adequate fluid intake is essential for older adults' cognitive health. Moderate fluid consumption shows a linear association with improved cognitive function, potentially mediated by cerebral blood flow changes.
Area of Science:
- Gerontology
- Neuroscience
- Hydration Science
Background:
- Adequate fluid intake is crucial for cognitive health in older adults.
- Uncertainty exists regarding the linearity of fluid intake and cognitive improvement.
- The mechanisms mediating the fluid intake-cognition association require elucidation.
Purpose of the Study:
- To investigate the relationship between fluid intake and cognitive function in older adults.
- To explore the potential linear association and underlying mechanisms of fluid intake on cognition.
- To assess the impact of fluid consumption on cerebral blood flow in the elderly.
Main Methods:
- Study involved 33 older adults in a geriatric facility.
- Fluid intake was monitored, and cognitive function assessed using the Mini-Mental State Examination (MMSE-J).
- Cerebral blood flow was evaluated using ultrasonography in common carotid arteries.
Main Results:
- A positive linear association was found between fluid intake (<42 mL/LBM/day) and MMSE-J score improvement.
- Fluid intake correlated inversely with the resistance index in the right common carotid artery.
- Findings suggest altered cerebral blood dynamics related to fluid consumption.
Conclusions:
- Fluid consumption within moderate ranges is linearly associated with cognitive improvement in older adults.
- This cognitive enhancement appears to be mediated by changes in cerebral hemodynamics.
- The study highlights the importance of hydration for cognitive function and cerebral blood flow in the elderly.
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