ClinicalTrials.gg
RecruitingNCT07818668Updated Sep 17, 2026

tACS for Self-Other Boundary in Schizophrenia

An interventional study of Transcranial Alternating Current Stimulation (tACS) and Sham Transcranial Alternating Current Stimulation (tACS) in Schizophrenia / Schizoaffective Disorder, sponsored by Chunyan Zhu. Recruiting at 1 site in China. Open to participants aged 18 Years to 50 Years. Per ClinicalTrials.gov, last updated 2026-09-17.

Sponsored by Chunyan Zhu · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 4 months after the study started (first participant enrolled Mar 2026, registered Aug 2026).
  • Started Mar 2026; still recruiting 7 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
100
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 247 studies in Schizophrenia with a site in China — 61 open to participants now, 65 under way, 4 of them phase 3. Schizophrenia · China.

Planned enrollment
104th of 212
100 · median 100
Started
2026
with 22 others
No phase
106 of 247
34 open now
Primary completion
2027-09
later than 41 of 64 live
Registered
240th of 247
by date

Among the 247 studies in Schizophrenia with a site in China, this one is the 104th largest by planned enrollment of the 212 interventional ones that give a count, is one of 23 that started in 2026, is one of 106 with no phase, reaches primary completion later than 41 of the 64 other live ones, and was the 240th registered.

Schizophrenia

3,563 studies on the registry are indexed under Schizophrenia; 491 are open to participants now.

Browse Schizophrenia studies →

Open to participants now

61 of the 247 studies in Schizophrenia with a site in China are open now. Recruiting first, the newest first:

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All 61 open studies →

A study can be open while its sites in China have not opened yet or have stopped. Only those recruiting at a site in China →

Who these studies take

Of the 331 Schizophrenia studies recruiting now, 63 (19%) set no upper age limit and 257 (78%) stop at 75 or younger; 42 take children under 18; 83 take healthy volunteers.

This study: 18 Years to 50 Years · all sexes · no healthy volunteers.

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02

Study summary

This clinical trial investigates whether a non-invasive brain stimulation technique called transcranial alternating current stimulation (tACS) can improve the ability to distinguish between "self" and "others" in patients with schizophrenia. The intervention targets the medial prefrontal cortex (mPFC), a brain region critical for self-awareness, using 10Hz stimulation at 2mA for 20 minutes daily over five consecutive days.

The study has two main objectives. First, it aims to characterize the underlying mechanisms of self-other boundary dysfunction in schizophrenia by comparing behavioral and brain activity patterns among three participant groups: patients with schizophrenia, individuals with high schizotypal traits, and healthy volunteers. During this mechanism phase, participants perform two computer-based self-other face recognition tasks designed to manipulate prior probability (varying the proportion of self vs. other faces across blocks) and perceptual uncertainty (adjusting the Gaussian blur level of face images), while their brain activity is recorded via EEG. Behavioral performance (response time, accuracy, and sensitivity d') and EEG markers (alpha-band power, N170, and P1 components) are analyzed to quantify deficits in predictive coding.

Second, the study aims to evaluate the therapeutic efficacy of tACS in a randomized, double-blind, sham-controlled trial. The primary hypothesis is that active tACS, compared to sham stimulation, will significantly improve patients' accuracy in distinguishing self from other faces, accompanied by enhanced alpha-band brain oscillations and reduced scores on the Examination of Anomalous Self-Experience (EASE) scale.

All participants will undergo clinical assessments, complete the face recognition tasks while their brain activity is monitored via EEG, and complete follow-up assessments 48 hours after the last stimulation session. The findings from this study may provide a novel, mechanism-based non-pharmacological intervention for addressing core self-disturbance in schizophrenia, potentially improving patients' social functioning and quality of life.

03

Conditions studied

  • Schizophrenia / Schizoaffective Disorder
04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Diagnosis of schizophrenia according to criteria
  • Presence of hallucinations or delusions
  • Age between 18 and 50 years
  • Clinically stable on a stable dose of antipsychotic medication for at least 4 weeks prior to enrollment, with no anticipated medication changes during the study period
  • Normal or corrected-to-normal vision (≥ 20/40) as assessed by standard visual acuity test
  • Able to understand and provide written

Exclusion criteria

Exclusion Criteria:

  • History of neurological disorders (e.g., epilepsy, stroke, traumatic brain injury)
  • Presence of other major psychiatric disorders (e.g., bipolar disorder, major depressive disorder)
  • Previous receipt of non-invasive brain stimulation (e.g., tACS, tDCS, rTMS)
  • History of substance dependence or abuse within the past 6 months
  • Metal implants in the head or skull (e.g., cochlear implants, deep brain stimulators)
  • Pregnancy or breastfeeding
  • Presence of skin lesions, wounds, or sensitive skin at electrode placement sites (Fpz, AF7, AF8, F5, F6)
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

DSM diagnostic criteria

The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
100 participants (estimated)

Study arms

  • Active comparator
    Active tACS Group

    Participants receive 10Hz transcranial alternating current stimulation (tACS) at 2mA intensity, targeting the medial prefrontal cortex (mPFC), for 20 minutes per day over 5 consecutive days.

    Device: Transcranial Alternating Current Stimulation (tACS)

  • Sham comparator
    Sham tACS Group

    Participants receive sham stimulation with identical electrode placement and procedures as the active group, but current is delivered only during the 30-second ramp-up and ramp-down periods, with no active stimulation for the remainder of the 20-minute session.

    Device: Sham Transcranial Alternating Current Stimulation (tACS)

Interventions

  • DeviceTranscranial Alternating Current Stimulation (tACS)

    10Hz tACS with 2mA intensity, 20 minutes per day

  • DeviceSham Transcranial Alternating Current Stimulation (tACS)

    Sham stimulation with identical electrode placement and procedures as the active tACS group. Current is delivered only during the 30-second ramp-up and ramp-down periods, with no active stimulation for the remainder of the 20-minute session.

06

What researchers measure

Primary outcomes

  1. Change in Self-Other Face Recognition Sensitivity (d')

    Change from baseline in the sensitivity index (d') measured by the self-other face recognition task at 48 hours after the last tACS session. Participants distinguish between self and other faces under varying prior probability and perceptual uncertainty conditions. The sensitivity index (d') is dimensionless; a higher value indicates better ability to differentiate between self and other faces.

    Time frame: Baseline (pre-intervention) and 48 hours after the last tACS session

  2. Change in Medial Prefrontal Cortex Alpha-Band Oscillatory Power

    Change from baseline in alpha-band (8-13 Hz) oscillatory power measured by electroencephalography (EEG) over the medial prefrontal cortex (mPFC) at 48 hours after the last tACS session. Alpha-band power is assessed during resting-state and self-other face recognition task performance to evaluate the neural effects of the intervention.

    Time frame: Baseline (pre-intervention) and 48 hours after the last tACS session

07

Study locations

1 of 1 sites recruiting
  • The Fourth People's Hospital of Hefei
    Hefei, Anhui, China
    Recruiting
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Mar 2026 (actual). Primary completion is estimated for Sep 2027, 17 months after the start.

Of 753 non-industry interventional studies with no phase under Schizophrenia, half reached primary completion within 33 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 56. This study's planned 17 months is below that.

Counting every sponsor, half of 766 studies reached it within 32 months; a quarter within 16 and three quarters within 56.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 13, 2026
First posted
Sep 14, 2026
StartActual
Mar 17, 2026
Primary completionEst.
Sep 15, 2027
CompletionEst.
Sep 30, 2027
Last update
Sep 17, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 17, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07818668
Lead sponsor
Chunyan Zhu
Responsible party
Chunyan Zhu (The dean of the School of Mental Health and Psychological Sciences at Anhui Medical University, Anhui Medical University) — Sponsor-investigator
First posted
Sep 14, 2026
Start date
Mar 17, 2026
Primary completion
Sep 15, 2027 (estimated)
Completion
Sep 30, 2027 (estimated)
Last update
Sep 17, 2026

Study contacts

long chen
Contact
chen37213@163.com
18712333621

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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