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Temporal and durational patterns associating respiration and swallowing
1ITDS Intellicom, Champaign, Illinois, USA.
This study provides normative data on respiration and swallowing coordination in young adults. Findings reveal sex-based differences in timing for muscle activation and laryngeal movement during swallowing events.
Area of Science:
- Physiology
- Biomechanics
- Speech and Hearing Sciences
Background:
- Understanding the temporal coordination between respiration and swallowing is crucial for identifying dysphagia.
- Previous research has limited normative data, especially regarding airflow direction and sex-based differences.
Purpose of the Study:
- To collect initial normative data on the temporal coordination of respiration and swallowing events in young adults.
- To investigate airflow direction before and after deglutitive apnea.
- To identify potential sex-based differences in the timing of key physiological events during swallowing.
Main Methods:
- Utilized a first-generation Respirodeglutometer to record respiration and swallowing events.
- Subjects (12 young adults) performed three swallows of two different bolus viscosities (total 72 swallows).
- Analyzed temporal coordination, airflow direction, submental surface electromyography, and laryngeal movement.
Main Results:
- A consistent pattern of respiration-swallowing coordination was observed in 42% of swallows, with 47% showing only one deviation.
- Deglutition apnea duration averaged 0.75 +/- 0.14 seconds.
- Males initiated submental muscle contraction earlier and laryngeal movement later compared to females.
Conclusions:
- Established initial normative data for respiration-swallowing temporal coordination in young adults.
- Highlighted sex-based differences in the timing of submental muscle contraction and laryngeal movement.
- Confirmed a predominant pattern of expiration before and after deglutitive apnea.
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