Decreased theta power at encoding and cognitive mapping deficits in elderly individuals during a spatial memory task

Area of Science:

• Neuroscience
• Cognitive Psychology
• Gerontology

Background:

• Cognitive mapping, crucial for navigation, may decline with age.
• Reduced theta power in older adults is linked to cognitive impairments.

Purpose of the Study:

• Investigate theta activity's role in cognitive mapping.
• Determine if decreased theta power explains age-related navigational deficits.

Main Methods:

• Electroencephalography (EEG) recorded brain activity in young and older adults.
• Participants performed a spatial memory task to create cognitive maps.
• Power spectra analyzed in frontal and parietal regions, correlated with performance.

Main Results:

• Cognitive mapping accuracy correlated with left frontal theta activity in young adults, but not older adults.
• Older adults exhibited impaired cognitive map creation.
• Reduced theta and alpha activity observed in older adults during encoding.

Conclusions:

• Encoding processes are impaired in older individuals.
• Age-related deficits in theta activity may underlie cognitive mapping difficulties.
• Theta activity is crucial for effective spatial memory and navigation.