Could a headset at home lift bipolar depression?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Adults aged 18 years or over. 2. Diagnosis bipolar disorder in a current depressive episode based on Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) criteria assessed by structured clinical assessment, Mini-International Neuropsychiatric Interview (MINI) (Sheehan et al.,1998). 3. Having at least a moderate severity of depressive symptoms as measured by a score of at least 18 in MADRS (Montgomery and Åsberg, 1979). 4. Either not taking antidepressant medication or taking a stable dose of antidepressant medication for at least 6 weeks before enrolment. 5. Either not currently in psychotherapy or in ongoing psychotherapy for at least 6 weeks before enrolment. 6. Being under care of GP. 7. Agreeable for GP to be regularly informed by research team about participation. 8. Able to provide written, informed consent. Exclusion Criteria: 1. Significant suicide risk as measured by answering 'yes' to questions 4, 5 or 6 on the Columbia Suicide Severity Rating Scale (C-SSRS) Screen (Posner et al., 2011). 2. Primary comorbid psychiatric disorder (e.g. obsessive compulsive disorder) based on DSM criteria as assessed in MINI (Sheehan et al., 1998). 3. Having a Young Mania Rating Scale (Young et al., 1978) score of 20 or more. 4. Current daily use of medications that affect cortical excitability (e.g. benzodiazepines). 5. Current illicit drug use or heavy alcohol use with high risk of alcohol use disorder as measured by a score of \> 8 in Alcohol use disorders identification test consumption (AUDITC) (Khadlesari et al., 2017; NICE, 2023). 6. History of electroconvulsive therapy (ECT), transcranial magnetic stimulation (TMS), cranial electrotherapy stimulation (CES), transcranial direct current stimulation (tDCS), deep brain stimulation (DBS), other brain stimulation, or psychosurgery for depression. 7. History of esketamine / ketamine for treatment of depression. 8. Medical disorder that may mimic mood disorder (e.g. hormonal disorder). 9. History of myocardial infarction, coronary artery bypass graft (CABG), coronary heart failure (CHF), or history of other cardiac issues. 10. Have cognitive impairment (e.g. dementia). 11. History of a neurological disorder (e.g., cerebrovascular events, stroke, structural lesion, epilepsy, seizures, Parkinson's disease). 12. History of migraines or intractable headaches. 13. Implant in brain, neurocranial defect or active implantable medical device. 14. Shrapnel or any ferromagnetic material in head. 15. If female and of child-bearing potential, currently pregnant or planning to become pregnant during the study 16. Concurrent enrolment in another interventional study.