Investigating Functional Changes in the Frontotemporal Cortex of Patients With Major Depressive Disorder Following Electroconvulsive Therapy or Magnetic Seizure Therapy Using Functional Near-infrared Spectroscopy (fNIRS)

Condition(s) studied

Investigational drug(s) / intervention(s)

Electroconvulsive Therapy: Electroconvulsive therapy will be administered 2 to 3 times per week according to a standardized protocol. Stimulation parameters-including intensity, target site, number of sessions, and duration-will be individually tailored for each participant based on prior research to ensure targeted and safe delivery within established safety parameters. Treatment will continue until the participant meets the protocol-defined response criteria or completes a maximum of 10 sessions.

Magnetic Seizure Therapy: Magnetic seizure therapy will be administered 2 to 3 times per week according to a standardized protocol. Stimulation parameters-including intensity, target location, number of sessions, and duration-will be individually tailored for each participant based on prior research to ensure targeted and safe delivery within established safety parameters. Treatment will continue until the participant meets the protocol-defined response criteria or completes a maximum of 10 sessions.

Study summary

Against the clinical backdrop of the growing global burden of neuropsychiatric disorders, the rapid rise in depression prevalence, and the frequent association of these conditions with cognitive impairment, this study highlights the limitations of current cognitive assessment tools-such as their time-consuming nature and lack of specificity-and underscores the urgent need to develop simple and efficient assessment methods. In terms of treatment, modified electroconvulsive therapy (ECT) and magnetic seizure therapy (MST) are rapidly acting neuromodulation therapies; however, their effects on cognitive function and underlying brain mechanisms remain controversial, and there is a lack of direct comparative studies. Functional near-infrared spectroscopy (fNIRS) technology can non-invasively monitor changes in cerebral hemodynamics, providing a powerful tool for assessing brain function before and after treatment. Therefore, this study aims to combine resting-state and task-based fNIRS with multidimensional cognitive and emotional assessments to systematically compare the effects of ECT and MST on frontal-temporal cerebral hemodynamics. We seek to clarify the differences in brain function regulation between the two treatment modalities and their association with improvements in cognition and mood, with the goal of providing scientific evidence to elucidate the brain mechanisms underlying neurostimulation therapies and optimize individualized treatment plans.

Eligibility

Primary outcome measure(s)

• Change in Hamilton Depression Rating Scale (HAMD) Score — baseline and immediately after the intervention
  The HAMD is a clinician-administered depression assessment and consists of 17 items with a total score range from 0 to 54. A higher score indicates a worse outcome.
• Differences in frontal and temporal lobe function during cognitive tasks in patients with depression following seizure therapy. — baseline and immediately after the intervention
  Functional near-infrared spectroscopy (fNIRS) was used to measure hemodynamic responses in the frontal and temporal lobes of patients with depression undergoing electroconvulsive therapy (ECT) or magnetic seizure therapy (MST). Test tasks included a category verbal fluency task (VFT) and a Go/No-Go task.

Trial sites (1)

More The Second Hospital of Anhui Medical University trials in China

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