Show simple item record

dc.contributor.authorCock, Charles
dc.contributor.authorJones, Corinne A
dc.contributor.authorHammer, Marilyn J
dc.contributor.authorOmari, Taher
dc.contributor.authorMcCulloch, Timothy M
dc.date.accessioned2017-03-27T02:43:18Z
dc.date.available2017-03-27T02:43:18Z
dc.date.issued2016-08-17
dc.identifier.citationCock, C., Jones, C., Hammer, M., Omari, T., & Mcculloch, T. (2016). Modulation of Upper Esophageal Sphincter (UES) Relaxation and Opening During Volume Swallowing. Dysphagia, Dysphagia, 8/17/2016.en
dc.identifier.issn0179-051X
dc.identifier.urihttp://hdl.handle.net/2328/37000
dc.description“The final publication is available at Springer via http://dx.doi.org/10.1007/s00455-016-9744-4". This author accepted manuscript is made available following 12 month embargo from date of publication (17 Aug 2016) in accordance with the publisher's copyright policy.en
dc.description.abstractUES opening occurs following cricopharyngeus deactivation and submental muscle contraction causing hyolaryngeal elevation and UES distraction. During impedance manometry, the inverse of impedance (admittance) can be used to measure bolus presence and infer UES opening. We hypothesized that the temporal relationship between UES relaxation, opening and hyolaryngeal elevation would change with increasing bolus volume. Simultaneous intramuscular cricopharyngeal (CP) electromyography (EMG), surface submental EMG (SM-EMG), and high-resolution impedance manometry were recorded in eight (aged 27 ± 7 years, 5 M) healthy volunteers, while swallowing 0.9 % saline boluses of 2, 5, 10, and 20 ml. Data were exported and analyzed via Matlab. Statistical analysis comprised repeated measures one-way ANOVA and Pearson correlation. A P value of <0.05 was considered significant. Duration of CP deactivation increased at 20 ml volume (P < 0.001). UES relaxation and opening increased with increasing bolus volume (P < 0.001); however, overall duration of SM activation did not change. As UES opening occurs progressively earlier with increasing volumes, peak SM-EMG activity occurs relatively later (P < 0.001) and shifts from occurring before to following peak UES distention. During healthy swallowing, there is sensory modulation of cricopharyngeal and submental muscle activity. Intrabolus pressures, transmitted from the tongue base and pharynx, play a progressively more important role in sphincter opening with increasing volume. The findings may explain why some healthy elderly and patients with oropharyngeal dysphagia have difficulty swallowing larger while tolerating smaller bolus volumes.en
dc.language.isoen
dc.publisherSpringer Science+Business Mediaen
dc.rights© Springer Science+Business Media New York 2016en
dc.subjectBolus volumeen
dc.subjectCricopharyngeal electromyographyen
dc.subjectDeglutitionen
dc.subjectDeglutition disordersen
dc.subjectSubmental electromyographyen
dc.subjectUES openingen
dc.titleModulation of Upper Esophageal Sphincter (UES) Relaxation and Opening During Volume Swallowingen
dc.typeArticleen
dc.identifier.doihttps://doi.org/10.1007/s00455-016-9744-4en
dc.rights.holderSpringer Science+Business Mediaen
dc.rights.licenseIn Copyright
local.contributor.authorOrcidLookupOmari, Taher: https://orcid.org/0000-0001-5108-7378en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record