Autonomic Nervous System and Meridian Energy in Patients With Schizophrenia

This study is investigating how the autonomic nervous system (the part of your nervous system that controls automatic functions like heart rate and breathing) and a concept from traditional Chinese medicine called "meridian energy" differ between people with schizophrenia and healthy individuals. It is an observational study — no new treatment is being tested. **You may be eligible if...** - Disease group: You have a confirmed diagnosis of schizophrenia, your condition is stable, and your medication and dosage have not changed in the past 3 months. You are between 18 and 65 years old and can communicate in Mandarin or Taiwanese. - Control group: You have no chronic illness, no recent acute symptoms in the past month, are between 18 and 65, and can communicate in Mandarin or Taiwanese. **You may NOT be eligible if...** - You have cardiovascular disease, serious neurological disorders, or early-stage dementia - You have had medication changes or a hospital admission for psychiatric reasons in the last 3 months (disease group) - You have chronic illness or recent acute symptoms (control group) Talk to your doctor to see if this trial is right for you.