Effects of Age on Prefrontal Cortex Oxygenation Dynamics
Author Information
Author(s): Zhou Junhong, Hong Yinglu, Yu Wanting, Iloputaife Ike, Bao Dapeng, Manor Brad, Lipsitz Lewis, Jor’dan Azizah
Primary Institution: Harvard Medical School/Hebrew SeniorLife
Hypothesis
Age and cognitive demand affect the complexity of prefrontal cortex oxygenation dynamics and its relationship to cognitive performance.
Conclusion
Older adults show lower complexity in prefrontal cortex oxygenation compared to younger adults, which is linked to cognitive performance.
Supporting Evidence
- Older adults exhibited lower fNIRS complexity regardless of task condition.
- Both age groups showed greater complexity during more demanding tasks.
- Greater HbO2 complexity was associated with better task accuracy.
- Older adults with greater fNIRS complexity had faster reaction times.
Takeaway
As people get older, their brain's oxygen regulation becomes less complex, which can affect how well they perform on tasks.
Methodology
Functional near-infrared spectroscopy (fNIRS) was used to measure oxygenation signals during cognitive tasks in younger and older adults.
Participant Demographics
24 younger adults (average age 28) and 27 older adults (average age 78).
Statistical Information
P-Value
p=0.0005
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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