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Elucidation of the Pathophysiological Basis of Reduced Pain Thresholds in Parkinson's Disease

A Study on the Pathophysiological Mechanisms of Reduced Pain Thresholds in Parkinson's Disease with Thermal-Induced Painful Stimuli

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT1030230084
Enrollment
90
Registered
2023-05-21
Start date
2023-05-21
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

healthy subjects Parkinson Disease

Interventions

Observation of neural activity changes using fMRI when applying thermal pain stimuli.

Sponsors

Abe Mitsunari
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Parkinson's Disease Arm 1. Meet the diagnostic criteria of clinically established Parkinson's disease or clinically probable Parkinson disease according to the International Parkinson and Movement Disorder Society diagnostic criteria. 2. Have a Hoehn & Yahr stage of 3 or less. 3. 50 years of age or older. Healthy Elderly Control Arm 1. 50 years of age or older. 2. Do not meet the above criteria for Parkinson's disease. Healthy Young Control 1. 20 years of age or older but less than 50 years. 2. Do not meet the above criteria for Parkinson's disease.

Exclusion criteria

Exclusion criteria: 1. Diagnosis of diseases that cause specific chronic pain, such as osteoarthritis, rheumatoid arthritis, irritable bowel syndrome, fibromyalgia, complex regional pain syndrome, multiple sclerosis, and others. 2. Presence of chronic pain. 3. Presence of pain on the day of the visit. 4. History of major depression or bipolar disorder as defined by DSM-IV within the past year, or a history of schizophrenia as defined by DSM-IV in the past. 5. Presence of parkinsonism. 6. Presence of skin lesions, such as burns, on the non-dominant forearm to be stimulated with thermal stimuli. 7. History of alcohol or drug dependency defined by DSM-IV within the past two years. 8. Presence of significant psychiatric symptoms, excitability, or behavioral abnormalities that would make it difficult to comply with the protocol within the past three months. 9. Presence of systemic severe deseases or unstable conditions. 10. Presence of other abnormalities that affect cognitive function, such as infections or metabolic disorders. 11. MMSE score of 23/30 or less indicating cognitive impairment. 12. Any other condition deemed inappropriate by the principal investigator or facility physician.

Design outcomes

Primary

MeasureTime frame
Identifying and analyzing neural activity regions in the central nervous system during pain stimulation.

Secondary

MeasureTime frame
Behavioral data such as MDS-UPDRS (Movement Disorder Society-Unified Parkinson's Disease Rating Scale), MMSE (Mini Mental State Examination), and behavioral data on the analgesic effect of tactile stimulation.. Comparison of pain threshold among three groups. Correlation analysis between pain threshold and the primary outcome measures.

Contacts

Public ContactMayumi Inoue

National Center of Neurology and Psychiatry

mainoue@ncnp.go.jp+81-42-346-2206

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026