Suppression of Abdominal Motor Activity during Swallowing in Cats and Humans.
Suppression of Abdominal Motor Activity during Swallowing in Cats and Humans.
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DOI：
10.1371/journal.pone.0128245
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Bolser DC
中科院分区：
文献类型：
--
作者：
Pitts T;Gayagoy AG;Rose MJ;Poliacek I;Condrey JA;Musselwhite MN;Shen TY;Davenport PW;Bolser DC
Diseases affecting pulmonary mechanics often result in changes to the coordination of swallow and breathing. We hypothesize that during times of increased intrathoracic pressure, swallow suppresses ongoing expiratory drive to ensure bolus transport through the esophagus. To this end, we sought to determine the effects of swallow on abdominal electromyographic (EMG) activity during expiratory threshold loading in anesthetized cats and in awake-healthy adult humans. Expiratory threshold loads were applied to recruit abdominal motor activity during breathing, and swallow was triggered by infusion of water into the mouth. In both anesthetized cats and humans, expiratory cycles which contained swallows had a significant reduction in abdominal EMG activity, and a greater percentage of swallows were produced during inspiration and/or respiratory phase transitions. These results suggest that: a) spinal expiratory motor pathways play an important role in the execution of swallow, and b) a more complex mechanical relationship exists between breathing and swallow than has previously been envisioned.
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