Effects of five daily high-frequency rTMS on Stroop task performance in aging individuals

Area of Science:

• Neuroscience
• Cognitive Psychology
• Gerontology

Background:

• Previous research indicates high-frequency repetitive transcranial magnetic stimulation (HF-rTMS) benefits inhibitory control in young adults.
• The effects of HF-rTMS on cognitive functions in older adults undergoing normal aging are not well understood.

Purpose of the Study:

• To investigate whether HF-rTMS can improve inhibitory and attentional control in healthy elderly adults.
• To assess the impact of daily HF-rTMS sessions on cognitive performance in normal aging.

Main Methods:

• 16 healthy elderly adults were recruited and randomly assigned to receive either 10 Hz HF-rTMS or sham stimulation.
• Five daily sessions of stimulation were applied over the left dorsolateral prefrontal cortex.
• Cognitive performance, specifically inhibitory control, was measured using a modified Stroop task before and after the intervention period.

Main Results:

• Participants receiving active HF-rTMS showed significant improvements in reaction time during incongruent Stroop task trials.
• These improvements in processing distracting information were observed post-treatment compared to pre-treatment baseline.
• No significant changes were noted in the sham stimulation group.

Conclusions:

• Daily HF-rTMS application over the left dorsolateral prefrontal cortex can enhance attentional control in normally aging individuals.
• This study provides early evidence for the efficacy of HF-rTMS in improving cognitive functions relevant to aging.
• HF-rTMS represents a potential non-invasive neuromodulation strategy for supporting cognitive health in older populations.