Clinical Research Directory

TaVNS for Capsaicin-Induced Pain

Effective pain management remains a major clinical challenge. Transcutaneous auricular vagus nerve stimulation (taVNS) has emerged as a promising, non-invasive neuromodulation technique due to its safety, ease of administration, and cost-effectiveness. Preliminary evidence suggests that taVNS exerts analgesic effects by activating afferent vagal fibers, which integrate signals in key central nodes such as the nucleus tractus solitarius (NTS). This process subsequently modulates pain-processing networks, neurotransmitter balance, inflammatory responses, and autonomic function. Despite its potential, the precise central neural mechanisms underlying taVNS-induced analgesia remain unclear, limiting the optimization of stimulation parameters (e.g., intensity, frequency, and target specificity) and the enhancement of long-term therapeutic outcomes. Previous studies have highlighted the role of taVNS in activating descending pain inhibitory pathways and modulating the limbic system, yet a comprehensive understanding of the causal neurophysiological dynamics is still lacking. This study aims to investigate the analgesic efficacy of taVNS using a capsaicin-induced pain model. Furthermore, by employing Transcranial Magnetic Stimulation combined with Electroencephalography (TMS-EEG), we seek to elucidate the central neural mechanisms of taVNS. By integrating causal intervention with high-temporal resolution brain activity recording, this research will provide scientific insights into the modulation of pain-related pathways-such as descending inhibitory and cognitive-affective networks-ultimately facilitating the development of standardized, individualized, and precise clinical interventions for pain management.

The Effect of Non-invasive Brain Stimulation rTMS on Hand Muscles in Chronic Stroke Patients.

The study is about using a brain stimulation technique called rTMS (Repetitive Transcranial Magnetic Stimulation) to help improve hand muscles in people who had a stroke. Researchers want to understand how this device can help stroke patients use their hands better.

Scalp Acupuncture Combined With rTMS for Upper Limb Motor Dysfunction in Stroke: A Brain Network Study

This study aims to compare the improvement effects of the rTMS (repetitive transcranial magnetic stimulation) combined with conventional rehabilitation therapy group with the rTMS combined with scalp acupuncture and conventional rehabilitation therapy group. Through statistical analysis of the results obtained from functional near-infrared spectroscopy technology during task states, the investigators elucidate the neuroregulatory mechanism of scalp acupuncture combined with rTMS in improving upper limb motor function in stroke patients under MEP localization, and provide evidence for a more optimal rehabilitation program for post-stroke upper limb motor dysfunction.

Neuroimage-guided Dual-target Continuous Theta Burst Stimulation for Generalized Anxiety Disorder

The aim of this clinical trial was to determine whether image-guided dual-target cTBS is effective for anxiety disorders. The main questions it aims to answer are: 1. Does dual-target cTBS improve patients' anxiety symptoms? 2. Does dual-target cTBS improve patients' somatization symptoms? 3. Researchers will compare cTBS real and sham stimulation to determine whether cTBS is effective in treating anxiety disorders. Participants will: 1. Received either cTBS treatment or sham stimulation for 7 consecutive days 2. Psychological assessment and MRI scan were performed before treatment, within 2 days, 2 weeks and 1 month after treatment 3. Adverse reactions during the experiment were recorded

Individualized Location-based rTMS for Migraine Treatment: A Multicenter Clinical Study

For migraine patients experiencing at least four attack days per month and undergoing transcranial magnetic stimulation (TMS) treatment, a randomized, double-blind controlled trial is conducted, dividing participants into a traditional targeting group and an individualized targeting group. Patients in both groups are followed up before treatment and at 1, 2, and 3 months post-treatment, evaluating the following parameters: migraine diaries, the number of migraine days, rescue medication usage, headache intensity, the number of moderate-to-severe migraine days, and the proportion of patients achieving a ≥50% reduction in migraine days. Further assessments include changes in the Migraine Disability Assessment (MIDAS), Headache Impact Test-6 (HIT-6), Migraine-Specific Quality of Life Questionnaire (MSQ), Pittsburgh Sleep Quality Index (PSQI), Patient Global Impression of Change (PGIC), 24-item Hamilton Depression Scale (HAMD-24), and 14-item Hamilton Anxiety Scale (HAMA-14). Biomarker and metabolic analyses include tryptophan and kynurenine metabolism, calcitonin gene-related peptide (CGRP), pituitary adenylate cyclase-activating polypeptide (PACAP), vasoactive intestinal peptide (VIP), neuropeptide Y (NPY), substance P, endothelin-1, inflammatory cytokines (IL-1β, IL-6, TNF-α, TGF-β1), glutamate, endocannabinoids and related lipids, as well as gut microbiota composition. Additionally, changes in resting-state functional magnetic resonance imaging (rs-fMRI) before and after treatment are analyzed. This study aims to compare the efficacy of TMS treatment under different targeting strategies in migraine patients, providing theoretical support for clinical applications.

Intermittent Theta Burst Stimulation in Fibromyalgia Syndrome

Research on repetitive transcranial magnetic stimulation therapy in fibromyalgia syndrome (FMS) is increasing rapidly. High-frequency rTMS administration to FMS patients is reported to restore intracortical facilitation and provide successful pain relief. This finding supports restoration of cortical stimulation as one of the possible mechanisms of action for rTMS. One treatment protocol is intermittent theta burst stimulation (iTBS, a variant of excitatory rTMS). Although there are many treatment protocols, there are few widely accepted treatment schemes in the literature. In fibromyalgia syndrome, there is no study in the literature. It was planned to include at least 30 patients aged 18-65 years who were admitted to İzmir Katip Çelebi University Atatürk Training and Research Hospital Physical Medicine and Rehabilitation Outpatient Clinic or hospitalized in the ward and diagnosed with fibromyalgia syndrome according to the 2016 criteria. This study has a prospective, parallel group, randomized, sham-controlled study design. A total of 30 fibromyalgia patients will be randomized into 2 groups and will receive a total of 10 sessions of transcranial magnetic stimulation to the primary motor cortex with intermittent theta bust stimulation technique or sham application. Patients will continue their current fibromyalgia treatment.Numeric Rating Scale-pain intensity (NRS-pain), revised Fibromyalgia Impact Questionnaire (FIQR), Pain Catastrophizing Scale (PCS), Hospital Depression Anxiety Scale (HADS) will be used in the evaluation of the patients.