Timing of Major Events of Pharyngeal Swallowing

Abstract

swallowing depends on the synergistic motion of the tongue, larynx, and pharyngeal wall to develop a bolus pressure gradient for bolus transit. However, few studies have provided timing relationships for clinical evaluations. To examine the timing relationships of pharyngeal anatomic motion, pressure generation, and bolus transit in the normal swallow, this study uses a new method, manofluorography, to correlate these swallowing aspects. Thirty-one events were timed by analyzing five swallows each in 14 normal subjects. A different perspective of pharyngeal physiology is presented.

Mechanisms Involved in Postdeglutition Retention in the Elderly

“…Therefore, it might be hypothesized that retention develops when these driving forces become deficient. On the other hand, the propagated pharyngeal contraction may facilitate pharyngeal clearance as it seems to follow the bolus tail [5,6]. In addition, a pharyngeal shortening most pronounced between the arytenoids and the valleculae has been observed during deglutition [6,7].…”

Kinematic pharyngeal transit times in myopathy: Evaluation for dysphagia

“…Recent studies have reported normal values for pharyngeal transit times [2,3]. Qualitative VDF and quantitative esophageal data have previously been reported for subjects with myopathy [4][5][6][7].…”

Dietary adjustments and nutritional therapy during treatment for Oral-Pharyngeal Dysphagia

“…Patients have been shown to refuse a food consistency if it takes 10 s or more for oral and pharyngeal transit of a bolus. Normally the oral and pharyngeal phases of swallowing each take only 1 s or less [12]. Oral intake was discontinued for Mr. T during Swallowing therapy because he aspirated more than 10% of the liquid bolus during the modified barium swallow study.…”