Feasibility study to evaluate the safety and effectiveness of magnetic resonance guided focused ultrasound (MRgFUS) ablation of the ventrooralis (Vo) nucleus of the thalamus for the treatment of focal hand dystonia (e.g., musician's focal dystonia and/or writer's cramp)

Feasibility study to evaluate the safety and effectiveness of magnetic resonance guided focused ultrasound (MRgFUS) ablation of the ventrooralis (Vo) nucleus of the thalamus for the treatment of focal hand dystonia (e.g., musician's focal dystonia and/or writer's cramp) - MR guided focused ultrasound treatment for focal hand dystonia

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000016590

Enrollment

Registered

2015-02-23

Start date

2015-11-01

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

Focal Hand Dystonia (Musician&#39

Interventions

Focused ultrasound

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients with focal hand dystonia which is intractable to conventional conservative treatment

Exclusion criteria

Exclusion criteria: not suitable conditions for surgical intervention

Design outcomes

Primary

Measure	Time frame
Tubiana Scale. Writers Cramp Rating Scale Video-clips	—

Secondary

Measure	Time frame
Arm Dystonia Disability Scale (ADDS) Modified QUEST for FHD	—

Countries

Japan

Contacts

Public ContactShiro Horisawa

Tokyo Women's Medical University Department of Neurosurgery

neurosurgery0222@gmail.com03-3353-8111

Outcome results

None listed

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

Feasibility study to evaluate the safety and effectiveness of magnetic resonance guided focused ultrasound (MRgFUS) ablation of the ventrooralis (Vo) nucleus of the thalamus for the treatment of focal hand dystonia (e.g., musician&#39;s focal dystonia and/or writer&#39;s cramp)