Age-related cerebral changes during different n-back tasks: a functional near-infrared spectroscopy study

Area of Science:

• Neuroscience
• Cognitive Psychology
• Aging Research

Background:

• The n-back task is a standard measure for assessing working memory.
• Research on age-related cognitive decline often utilizes the n-back task.
• Functional near-infrared spectroscopy (fNIRS) studies on this topic are limited.

Purpose of the Study:

• To investigate age-related differences in brain activation during the n-back task.
• To explore the utility of fNIRS in studying cognitive aging.
• To compare brain activation patterns and performance between elderly and young adults.

Main Methods:

• Collected fNIRS data from 18 elderly and 19 young participants.
• Participants performed various n-back tasks.
• Compared brain activation and peripheral performance between age groups.

Main Results:

• Significant differences in brain activation patterns were observed between elderly and young participants.
• The older group showed reduced activation in prefrontal areas under the 3-back condition.
• Older adults' performance plateaued at the 2-back level with decreased prefrontal activation.

Conclusions:

• Findings suggest potential neural markers for cognitive decline in aging.
• These results may inform future screening strategies for cognitive impairment.
• fNIRS can effectively detect age-related differences in brain function during cognitive tasks.