γ-Aminobutyric acid (GABA) administration improves action selection processes: a randomised controlled trial

Area of Science:

• Neuroscience
• Cognitive Psychology
• Pharmacology

Background:

• Real-world tasks demand rapid action control and efficient response sequencing.
• The gamma-aminobutyric acid (GABA)-ergic system is implicated in modulating action cascading.
• Understanding GABA's role is crucial for cognitive enhancement strategies.

Purpose of the Study:

• To investigate the causal role of the GABA-ergic system in action cascading.
• To determine if synthetic GABA administration affects the efficiency of switching between responses.

Main Methods:

• A double-blind, randomized, between-group study with 30 healthy adults.
• Participants received either 800 mg of synthetic GABA or a placebo (microcrystalline cellulose).
• Performance was assessed using a stop-change paradigm measuring action selection under interruption.

Main Results:

• GABA administration significantly increased action selection compared to placebo.
• This improvement was observed when participants had to simultaneously stop and change a response.
• Enhanced action selection was also noted when the change occurred post-interruption.

Conclusions:

• Systemic administration of synthetic GABA causally modulates action cascading performance.
• The GABA-ergic system plays a key role in the efficiency of response sequencing and adaptation.
• Findings suggest potential applications for GABA in cognitive training and intervention.