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Related Experiment Video

Updated: May 28, 2025

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment

Published on: September 20, 2020

Basal forebrain activation improves working memory in senescent monkeys.

Kendyl R Pennington¹, Luca Debs², Sophia Chung³

¹Dept Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA, USA.

Brain Stimulation

|February 9, 2025

Summary

This summary is machine-generated.

Daily intermittent brain stimulation improved working memory in aging monkeys. This intervention, targeting the basal forebrain, showed lasting cognitive benefits and reversed some aging effects.

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Area of Science:

Neuroscience
Gerontology
Cognitive Science

Background:

Brain aging is linked to cognitive decline and dementia risk.
Degeneration of the basal forebrain cholinergic system is common in aging and dementia.
This system is crucial for executive function throughout life and in disease.

Purpose of the Study:

To investigate if daily intermittent basal forebrain stimulation can enhance cognition in aging Rhesus monkeys.
To explore the mechanisms underlying the effects of this stimulation.

Main Methods:

Senescent Rhesus monkeys received one-hour daily intermittent basal forebrain stimulation.
Cognitive performance, specifically working memory, was assessed over 15 months.
Cerebrospinal fluid levels of tissue plasminogen activator and brain glucose utilization were measured.

Main Results:

Stimulation improved working memory duration in all tested animals within 8-12 weeks.
Cognitive improvements were retained for at least three months post-stimulation.
Brain stimulation increased tissue plasminogen activator and improved glucose utilization in stimulated hemispheres.

Conclusions:

Intermittent basal forebrain stimulation effectively improves executive function in aging primates.
This stimulation may reverse some aspects of brain aging by modulating neurotrophic factors and glucose metabolism.
The findings suggest a potential therapeutic strategy for age-related cognitive decline and dementia.