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Posture, Tongue Position and Pronunciation

The Relationship Between Posture, Tongue Position and Hebrew Sibilant Consonants Pronunciation, and the Effect of Muscle Strengthening Program in Children and Teenagers

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07650734
Enrollment
80
Registered
2026-06-16
Start date
2026-07-01
Completion date
2028-07-01
Last updated
2026-06-16

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

Conditions

Speech Dysfunction

Keywords

pronunciation, posture, muscles, strength, tongue

Brief summary

Background: The main speech organ that affects the pronunciation of the various vowels is the tongue. The relationships between posture and voice, and between the position of the tongue at rest and posture, have been proven, but the relationship between pronunciation and posture has not yet been proven. The rationale for examining this relationship is that the imbalance and differing loads in poor neck and head posture cause different muscular arrangements of the muscles that support the jaw, tongue, and neck, which will thus affect pronunciation. Objectives: To examine the relationship between posture, tongue position, and the correct pronunciation in subjects with and without pronunciation disorders. In addition, to examine the effect of a muscle strengthening program on these characteristics. Methods: The study will include two parts. The first part will be a cross-sectional study using a questionnaire to examine speech therapists' perceptions of the relationship and importance of posture and pronunciation. The second part will include a prospective interventional clinical study to examine the relationship between tongue position at rest and pronunciation, posture, and muscle strength. In addition, the effect of adding muscle-strengthening training to conventional pronunciation therapy on the process of acquiring correct pronunciation will be examined.

Detailed description

This study will examine the relationship between posture, tongue position, and correct pronunciation in subjects with and without pronunciation disorders. In addition, we will examine the effect of a muscle-strengthening program on these characteristics. The first part will include an online questionnaire to examine speech therapists' perceptions of the relationship and importance of posture in speech therapy treatment. The second part will include a prospective interventional clinical study with participants with and without pronunciation disorders. The evaluation measures will include: assessment of the pronunciation by a speech therapist, assessment of posture (mobile app), assessment of tongue position at rest and during pronunciation (observation and ultrasound), measurement of neck and upper limb muscle strength (manual dynamometer), tongue strength (digital measuring spoon), jaw closing muscle strength (Byte), breathing, and swallowing (observation). The study group with pronunciation disorder will be divided into 2 groups: the intervention group will receive an exercise program to strengthen the neck and upper-limb muscles in addition to regular speech therapy treatments. The control group will receive the regular speech therapy treatments. The evaluation measures will be reviewed again at the end of the treatment series (up to 10 treatments).

Interventions

OTHERspeech therapy treatment

regular treatment to enhance good pronunciation

OTHERspeech therapy treatment and strengthening exercise

speech therapy treatment and strengthening exercise

Sponsors

University of Haifa
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)

Intervention model description

Prospective interventional clinical study with participants with and without pronunciation disorders. Baseline examination will include all participants. Following, the study group (with pronunciation disorder) will be divided into 2 groups: the intervention group will receive an exercise program to strengthen the neck and upper-limb muscles in addition to regular speech therapy treatments. The control group will receive the regular speech therapy treatments. The evaluation measures will be reviewed again at the end of the treatment series (up to 10 treatments).

Eligibility

Sex/Gender
ALL
Age
6 Years to 15 Years
Healthy volunteers
Yes

Inclusion criteria

* People with normal hearing * with and without pronunciation disorders

Exclusion criteria

* Children and teenagers who study in special education settings, * children and teenagers with phonological disorders at the prosodic or segmental level, * children and teenagers whose parents are under the impression that they do not hear well.

Design outcomes

Primary

MeasureTime frameDescription
Treatment successat completion of intervention - up to 10 weeksnumber of treatments until good pronunciation is achieved

Secondary

MeasureTime frameDescription
neck muscle strengthbaseline, at completion of intervention - - up to 10 weeksflexion and side flexion neck muscle strength via hand held dynamometer. Recorded in kilograms of force (kgf)
Tongue strengthbase line, at completion of intervention - - up to 10 weeksTongue strength will be assessed using a digital measuring spoon. Measurements will be recorded in g/cm2
Jaw closing strengthbase line, at completion of intervention- - up to 10 weeksjaw closing strength via Byte device
Tongue thicknessbase line, at completion of intervention- - up to 10 weeksTongue thickness will be measured using ultrasonography. Measurements will be recorded in millimeters (cm).

Contacts

CONTACTGali Dar, PhD
gdar@univ.haifa.ac.il+972505662054

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 17, 2026