Temporal lobe cortical electrical stimulation during the encoding and retrieval phase reduces false memories

Area of Science:

• Cognitive Neuroscience
• Neuroscience
• Psychology

Background:

• False memories can impair learning and decision-making.
• Previous research indicated repetitive transcranial magnetic stimulation (rTMS) could reduce false memories.
• Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique known to enhance cognitive functions.

Purpose of the Study:

• To investigate the effects of tDCS on false memory formation and retrieval.
• To determine if tDCS applied during encoding and retrieval phases can alter false memory susceptibility.
• To compare the efficacy of unilateral and bilateral tDCS of the anterior temporal lobes in modulating false memories.

Main Methods:

• Utilized a false memory task assessing participants' susceptibility to misinformation.
• Employed three conditions: unilateral tDCS (anodal left ATL), bilateral tDCS (anodal left/cathodal right ATL), and sham stimulation.
• Administered tDCS throughout both the encoding (learning) and retrieval (recall) phases of the memory task.

Main Results:

• Both unilateral and bilateral tDCS conditions significantly reduced false memories compared to sham stimulation.
• False memories were reduced by 73% in the active tDCS conditions.
• No significant changes were observed in the accuracy of recalling veridical (true) memories.

Conclusions:

• Anodal tDCS applied to the anterior temporal lobes during encoding and retrieval effectively reduces false memories.
• tDCS offers a potential non-invasive strategy for mitigating false memories and potentially enhancing learning.
• The findings highlight the role of the anterior temporal lobes in memory processes and the therapeutic potential of tDCS.