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Clinical Trial Summary

This is a sham controlled, randomized, double-blind, navigated repetitive Transcranial Magnetic Stimulation (nrTMS) study for the treatment of complex regional pain syndrome (CRPS types 1 and 2). The investigators study factors that may contribute to development, maintenance, or treatment responses with clinical, sleep, and psychiatric questionnaires and clinical examinations, quantitative sensory testing and neurophysiologic recordings, genetics, and MRI techniques.


Clinical Trial Description

rTMS hypothetically disrupts the default networks related to chronic pain and renders the brain more susceptible to drugs, rehabilitation, or cognitive behavioral therapy. In addition, there is experimental evidence that rTMS releases factors that are involved in endogenous top-down modulation of pain and neural plasticity. Thus, the analgesic effect of rTMS may be mediated via enforcing endogenous pain control systems at the brain level, in addition to its effects on neuroplastic effects. For active, navigated stimulation targets the investigators have the parietal opercular cortex overlying the secondary somatosensory cortex ("S2") and the primary motor cortex (M1). The investigators randomize participants to first receive nrTMS to the right "S2" or sham stimulation. After ten sessions the investigators follow up the participants up to three months. At three months, if the average pain is ≥5/10 in numeric rating scale (NRS), the participant is offered an active, open nrTMS treatment phase depending on which treatment the participant first received. If the participant benefits from the open label treatment, a maintenance therapy is offered (6 months with gradually reducing nrTMS treatment frequency). The symptoms and quality of life are followed with questionnaires and diaries. After the maintenance period, the RN calls a structured interview at 1, 3, and 6 months. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04439669
Study type Interventional
Source Helsinki University Central Hospital
Contact
Status Active, not recruiting
Phase N/A
Start date August 28, 2017
Completion date December 2024

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