Ageing affects event-related potentials and brain oscillations: a behavioral and electrophysiological study using a...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Gerontology

Background:

• Ageing impacts cognitive functions, including memory.
• Haptic recognition memory involves tactile object identification.
• Electrophysiological methods like EEG can reveal neural correlates of cognitive processes.

Purpose of the Study:

• To investigate the effects of ageing on haptic recognition memory for 3D objects.
• To compare event-related potentials (ERPs) and brain oscillations between young and older adults.
• To explore age-related differences in neural resource recruitment during tactile memory tasks.

Main Methods:

• Electrophysiological recordings using electroencephalography (EEG).
• Continuous haptic recognition task with familiar 3D objects.
• Analysis of event-related potentials (ERPs) and event-related spectral perturbation (ERSP) in young and older adults.

Main Results:

• Behavioral performance (accuracy, exploration time) was similar across age groups.
• Older adults exhibited lower ERP amplitude in a later time window (1200-1500 ms).
• Older adults showed greater reductions in alpha and beta power, suggesting compensatory neural activity.

Conclusions:

• Despite comparable behavioral outcomes, ageing alters neural processing during haptic recognition memory.
• Younger and older adults utilize distinct neural resources for tactile memory tasks.
• Theta band activity showed a reliable old/new effect in both age groups, overlapping with ERP findings.