Use of barometric pressure and electromyography measurement techniques to elucidate the mechanisms by which bolus passes from the oral cavity to the oropharynx during swallowing

PHYSIOLOGY & BEHAVIOR

卷:226

Article

Ofusa, Wataru^1,4  Yamada, Yoshiaki²  Ishida, Ryo³  Ohkubo, Mai³  Higashikawa, Asuka¹  Kimura, Maki¹  Shibukawa, Yoshiyuki¹ 

[1] Tokyo Dent Coll, Dept Physiol, Chiyoda Ku, 2-9-18 Misaki Cyo, Tokyo 1010061, Japan

[2] Tokyo Dent Jr Coll, Dept Dent Hyg, Chiyoda Ku, 2-9-18 Misaki Cyo, Tokyo 1010061, Japan

[3] Tokyo Dent Coll, Dept Oral Hlth & Clin Sci, Div Dysphagia Rehabil, Chiyoda Ku, 2-9-18 Misaki Cyo, Tokyo 1010061, Japan

[4] Tsurumi Univ, Dept Geriatr Dent, Sch Dent Med, Tsurumi Ku, 2-1-3 Tsurumi, Yokohama, Kanagawa 2308501, Japan

关键词: Swallowing;    Electromyography;    Barometric pressure;    Tongue;    Oropharynx;    Nasopharyngeal closure;   

DOI  :  10.1016/j.physbeh.2020.113115

来源: Elsevier

【 摘 要 】

Objectives: : The exact timings associated with swallowing are difficult to measure with the currently available methods. In this study, we aimed to elucidate the timings of action of the swallowing organs in the oral and pharyngeal stages of swallowing by recording the barometric pressure (BP) and tongue muscle activities. Methods: : Dry and water swallows were studied in 10 adults using electromyography and small barometers. BPs were recorded during swallowing in the oral cavity (BP-o) and pharynx (BP-p), associated with muscle activities of the anterior (TA) and posterior (TP) parts of the tongue and of the suprahyoid (SHy) muscle. To analyze the temporal pattern of each activity, times of onset, cessation, and peak were measured. Results: : Two characteristic waveforms were obtained. BP-o peaked immediately after onset and decreased to atmospheric pressure following a short plateau. However, BP-p gradually increased, reached a peak, and returned to the atmospheric pressure immediately before the end of BP-o. Since pressure increments indicated that the sensor was compressed in a closed space, onset and cessation of BP-p could correspond to the duration of nasopharyngeal closure. The onset of BP-p and the peak time of BP-o occurred in close succession. Thus, nasopharyngeal closure could be evaluated from BP-o. The sensor and EMG measured durations of oral and pharyngeal stages as 0.4 and 0.6 sec, respectively. TA activation began earlier than the TP. TA and TP peaks appeared before the BP-o peak, suggesting that the tongue begins the activity for swallowing before nasopharyngeal closure. Conclusions: : This study revealed movements of swallowing organs in the two stages with high temporal resolution. BP-o detected the duration of nasopharyngeal closure.

【 授权许可】

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