Transcranial direct current stimulation as a treatment for auditory hallucinations

Area of Science:

• Neuroscience
• Psychiatry
• Neuromodulation

Background:

• Auditory hallucinations (AH) are a common symptom in psychiatric disorders like schizophrenia.
• A significant portion of patients with AH do not respond adequately to antipsychotic medications.
• Current treatment options for medication-resistant AH are limited, often focusing on coping strategies rather than symptom reduction.

Purpose of the Study:

• To review the current knowledge on transcranial direct current stimulation (tDCS) for treating auditory hallucinations.
• To explore tDCS as a potential alternative treatment for medication-resistant AH.
• To provide guidelines for future research in this emerging therapeutic area.

Main Methods:

• Transcranial direct current stimulation (tDCS) involves applying low electric currents (1-2 mA) via surface electrodes to modulate cortical excitability.
• Anodal stimulation increases excitability, while cathodal stimulation decreases it.
• The review synthesizes existing literature on tDCS efficacy in various neurological and psychiatric conditions.

Main Results:

• tDCS is a safe, non-invasive, cost-effective, and portable neuromodulation technique.
• The method has demonstrated efficacy in treating symptoms across a range of conditions including depression, bipolar disorder, schizophrenia, and neurodegenerative diseases.
• Its application for auditory hallucinations is a relatively new but promising field of investigation.

Conclusions:

• tDCS presents a viable and emerging therapeutic option for individuals experiencing medication-resistant auditory hallucinations.
• Further research is warranted to establish optimal protocols and confirm efficacy specifically for AH.
• This technique holds potential to significantly improve treatment outcomes for a challenging patient group.