Efficacy of EMG biofeedback therapy for muscle tension dysphonia and spasmodic dysphonia.

Efficacy of EMG biofeedback therapy for muscle tension dysphonia and spasmodic dysphonia. - Efficacy of EMG biofeedback therapy for voice disorders.

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000037703

Enrollment

Registered

2019-08-16

Start date

2019-11-01

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

Muscle tension dysphonia, spasmodic dysphonia

Interventions

Voice therapy is performed in 2 groups for 1 to 3 months using techniques to relieve muscle tone. In the group with biofeedback, the laryngeal surface EMG is used to monitor muscular activity during

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients with muscle tension dysphonia or spasmodic dysphonia who have been judged to have voice therapy.

Exclusion criteria

Exclusion criteria: A person with a history of cerebrovascular disorder or neurodegenerative disease. Person who has received voice therapy.

Design outcomes

Primary

Measure	Time frame
Difference in total VHI score before and after treatment.	—

Secondary

Measure	Time frame
Laryngeal muscle activity before and at the end of treatment. Voice function before treatment and at the end of treatment (Mean flow rate, GRBAS score, Jitter, Shimmer). Laryngeal endoscopy findings before and at the end of treatment.	—

Countries

Japan

Contacts

Public ContactSaori Yanagida

Health Sciences University of Hokkaido School of Rehabilitation Sciences

s.yanagi@hoku-iryo-u.ac.jp0133-23-1051

Outcome results

None listed

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