Transcranial Alternating Current Stimulation (tACS) as a Treatment for Insomnia
Gholam K Motamedi1, Peter G Jeliazkov1, Temitayo O Oyegbile-Chidi2
1Department of Neurology, Georgetown University Hospital, Washington, DC, USA.
Summary
Transcranial alternating current stimulation (tACS) shows promise for improving sleep quality and cognitive function in insomnia patients. While not significantly reducing sleep onset latency, tACS notably decreased arousals and enhanced overall sleep experience.
Area of Science:
- Neurology
- Sleep Medicine
- Neuroscience
Background:
- Insomnia is a prevalent sleep disorder affecting millions worldwide.
- Current treatments for insomnia have limitations and side effects.
- Non-invasive brain stimulation techniques offer potential novel therapeutic avenues.
Purpose of the Study:
- To investigate the efficacy of transcranial alternating current stimulation (tACS) in patients with chronic insomnia.
- To assess the impact of tACS on objective and subjective sleep parameters.
- To evaluate the effects of tACS on cognitive function and quality of life in this population.
Main Methods:
- Nine patients with chronic insomnia participated in the study.
- Two in-laboratory polysomnography sessions were conducted, two weeks apart.
- Participants received either tACS or a sham stimulation, randomized to the first or second session.
- tACS was applied bilaterally at F3/M1 and F4/M2 electrodes (0.75 mA, 0.75 Hz, 5-minute duration).
Main Results:
- While sleep onset latency and wake after sleep onset did not reach statistical significance, there were notable improvements.
- Significant improvements were observed in spontaneous and total arousals.
- Subjective sleep quality, quality of life, recall memory, sleep duration, sleep efficiency, and daytime sleepiness showed significant positive changes.
Conclusions:
- tACS may be a viable non-pharmacological intervention for improving various aspects of sleep and cognitive function in individuals with chronic insomnia.
- Further research with larger sample sizes is warranted to confirm these findings and optimize stimulation parameters.
- tACS demonstrated significant benefits in reducing arousals and enhancing subjective sleep quality and daytime functioning.
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