Influence of cold stimulation on the normal pharyngeal swallow response.
We examined the potential influence of cold stimulation of the anterior tonsillar pillars, before and after topical anesthesia, on the temporal linkage between the oral and pharyngeal components of the swallow. We hypothesized that if elicitation of the pharyngeal swallow were dependent upon stimulation of faucial mucosal receptors this response would be facilitated by cold tactile stimulation and inhibited by topical anesthesia. In 14 healthy volunteers undergoing simultaneous videoradiography and manometry we measured and compared regional transit and clearance times, and the timing of hyoid motion, upper esophageal sphincter relaxation, and opening within the swallow sequence. There was a significant, volume-dependent forward shift in timings of hyoid motion, upper esophageal sphincter (UES) relaxation profile, and opening which were influenced neither by cold stimulation nor topical anesthesia. Regional transit and clearance times and UES coordination were not influenced by cold stimulation. Pharyngeal clearance time was prolonged by tonsillar pillar anesthesia due to earlier arrival of the bolus head at this region (p = 0.002). We conclude that the normal pharyngeal swallow response is neither facilitated nor inhibited by prior cold tactile stimulation or topical anesthesia to the tonsillar pillars, respectively. These observations do not support the hypothesis that elicitation of the pharyngeal swallow response is dependent upon stimulation of mucosal receptors in the tonsillar arches.
Ali
G N
GN
Department of Gastroenterology, St George Hospital, University of New South Wales, Sydney, Australia.
Laundl
T M
TM
Wallace
K L
KL
deCarle
D J
DJ
Cook
I J
IJ
D000234:Adenoids; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D000772:Anesthesia, Local; D002933:Cineradiography; D003080:Cold Temperature; D003679:Deglutition / Q000502:physiology*; D004947:Esophagus / Q000502:physiology; D006801:Humans; D008365:Manometry; D008875:Middle Aged; D009055:Mouth / Q000502:physiology; D009092:Mucous Membrane / Q000294:innervation / Q000502:physiology; D009119:Muscle Contraction; D009334:Neck Muscles / Q000502:physiology; D010614:Pharynx / Q000502:physiology*; D010812:Physical Stimulation; D011984:Sensory Receptor Cells / Q000502:physiology; D013997:Time Factors; D014110:Touch / Q000502:physiology; D014743:Videotape Recording