Enhancing Visuospatial Working Memory Performance Using Intermittent Theta-Burst Stimulation Over the Right...

Area of Science:

• Neuroscience
• Cognitive Psychology

Background:

• Noninvasive brain stimulation offers potential for neuropsychiatric treatment.
• Standard methods like TMS have limitations in effect robustness and duration.
• Theta-burst stimulation (TBS) mimics brain activity for potentially longer-lasting effects.

Purpose of the Study:

• Investigate intermittent TBS (iTBS) effects on visuospatial working memory (VSWM).
• Target the right dorsolateral prefrontal cortex (rDLPFC), crucial for cognitive processes.
• Assess iTBS's impact on VSWM performance in healthy participants.

Main Methods:

• Applied iTBS over the rDLPFC or vertex in 24 healthy adults across two sessions.
• Measured VSWM using 2-back and 4-back tasks.
• Assessed performance pre- and post-stimulation.

Main Results:

• iTBS over the rDLPFC significantly improved VSWM in the 2-back task (discriminability, reaction time).
• No significant modulation of 4-back task performance was observed.
• iTBS was found to be safe and effective for causal brain area investigation.

Conclusions:

• The rDLPFC is critical for VSWM.
• iTBS is a safe and effective tool for studying the causal role of specific brain regions in cognition.