Chewing and swallowing difficulties (dysphagia) Digestive System
Conditions
Interventions
Participants will undergo non-contact video recording of mandibular movements during chewing tasks, and audio recording of diadochokinesis (/pa/, /ta/, /ka/) for speech motor assessment. Swallowing fu
Sponsors
Kaohsiung Medical University
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Community-dwelling older adults aged between 65 and 95 years 2. Able to complete the required speech and mandibular movement tasks correctly after a brief instruction session 3. No obvious impairment in lip closure, dentition (including the use of dentures), or jaw mobility 4. Able to open and close the mouth adequately without pain or discomfort 5. Willing to participate and provide written informed consent 6. Able to comply with the study procedures and complete all required recordings
Exclusion criteria
Exclusion criteria: 1. Presence of temporomandibular joint disorders (e.g., pain, limited range of motion, joint noise) 2. Neurological conditions that may affect orofacial motor control (e.g., Parkinson’s disease, stroke, ALS) 3. Severe cognitive impairment that affects the ability to understand instructions or perform the tasks 4. Recent oral surgery or facial trauma within the past 6 months 5. Unwillingness to participate or inability to complete the study protocol
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Mandibular movement parameters (average jaw opening/closing angle, distance, and velocity) and diadochokinetic rate (/pa/, /ta/, /ka/) are measured using non-contact video and audio analysis at a single timepoint | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. RSST score measured using the Repetitive Saliva Swallowing Test at a single timepoint to classify participants into normal and impaired swallowing groups 2. Diadochokinetic rate (syllables per second) for /pa/, /ta/, and /ka/ syllables measured using the fixed-count method (10 and 15 syllables per trial) and maximum-performance method (maximum number of syllables in a single breath), based on audio recordings analyzed in Audacity at a single timepoint 3. Average mouth opening distance measured using Kinovea software from non-contact video recordings at a single timepoint 4. Average mouth opening angle measured using Kinovea software from non-contact video recordings at a single timepoint 5. Average jaw opening velocity measured using Kinovea software from non-contact video recordings at a single time point 6. Average jaw closing velocity measured using Kinovea software from non-contact video recordings at a single timepoint | — |
Countries
Taiwan
Contacts
Public ContactLan-Yuen Guo
Outcome results
None listed