Transcranial temporal interference stimulation for treating bipolar disorder with depressive episodes: a feasibility...

Area of Science:

• Neuroscience
• Psychiatry
• Medical Devices

Background:

• Bipolar depression (BD-D) presents a substantial clinical challenge with a high disease burden.
• Existing treatments for BD-D have limitations, necessitating novel therapeutic approaches.

Purpose of the Study:

• To investigate the efficacy and safety of transcranial temporal interference stimulation (tTIS) for treating bipolar depression.
• To assess the impact of tTIS on depressive symptoms, cognitive function, and brain activity in BD-D patients.

Main Methods:

• A single-arm, open-label trial involving 36 patients diagnosed with bipolar depression.
• 25 participants completed a 5-day intervention with 10 sessions of tTIS targeting the left nucleus accumbens.
• Sessions involved 20-minute stimulation at 2 mA current intensity and 40 Hz envelope frequency.

Main Results:

• Significant reductions in depression severity were observed across multiple rating scales (HAMD-17, MADRS, HAMA, QIDS) (p < 0.05).
• 44% of participants met improvement criteria, and 28% achieved response.
• Improvements in memory and executive function were noted, with enhanced reward-related brain activity correlating with symptom reduction.

Conclusions:

• tTIS demonstrates preliminary efficacy and safety in alleviating depressive symptoms in bipolar depression.
• The findings suggest tTIS may also improve cognitive impairments associated with BD-D.
• Further research is warranted to confirm these promising results in larger, controlled trials.