Identification of distinct swallowing patterns for different bolus volumes
Clinical Neurophysiology, cilt.120, sa.9, ss.1750-1754, 2009 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 120 Sayı: 9
- Basım Tarihi: 2009
- Doi Numarası: 10.1016/j.clinph.2009.07.039
- Dergi Adı: Clinical Neurophysiology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1750-1754
- Anahtar Kelimeler: Glottic closure, Upper esophageal sphincter, Thyroarytenoid, Cricopharyngeus, Swallowing, Aspiration
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Objective: To investigate the time interval between glottic closure and the opening of upper esophageal sphincter during swallowing, by means of the coupling of electromyographical (EMG) recordings on the thyroarytenoid (TA) and the cricopharyngeus (CP) muscles. Methods: TA-EMG and CP-EMG pause were recorded by concentric needle electrodes using time-locked delay-line circuitry of the EMG apparatus. EMG data obtained from a total of 273 swallows of saliva, 3, 5, 10 and 15 ml volumes of water, were compared. Results: The relation between the onsets of TA-EMG activity and the CP-EMG pause demonstrated three different patterns of swallows. Pattern A was the delay of the onset of TA-EMG between 50-500 ms, and pattern B was the overlap of its activity with the CP-EMG pause. Pattern C was the earlier occurrence of the TA-EMG 50-550 ms before the CP-EMG pause. Pattern A was the most frequent type of swallows whereas the pattern C appeared during swallowing of larger volumes. Conclusions: Physiologically, there is a delay of the TA activation after the onset of CP-EMG pause during swallowing of small amounts in healthy subjects. Significance: This physiological phenomenon could be a potential risk of aspiration in patients with neurogenic dysphagia. © 2009 International Federation of Clinical Neurophysiology.