Ahuja NK, Chan WW (2016) Assessing upper esophageal sphincter function in clinical practice: a primer. Curr Gastroenterol Rep 18(2):7

Article  PubMed  Google Scholar 

Shaw SM, Martino R (2013) The normal swallow: muscular and neurophysiological control. Otolaryngol Clin North Am 46(6):937–956

Article  PubMed  Google Scholar 

Kocdor P, Siegel ER, Tulunay-Ugur OE (2016) Cricopharyngeal dysfunction: a systematic review comparing outcomes of dilatation, botulinum toxin injection, and myotomy. Laryngoscope 126(1):135–141

Article  CAS  PubMed  Google Scholar 

Grishaw EK, Ott DJ, Frederick MG et al (1996) Functional abnormalities of the esophagus: a prospective analysis of radiographic findings relative to age and symptoms. AJR Am J Roentgenol 167(3):719–723

Article  CAS  PubMed  Google Scholar 

Ho AS, Morzaria S, Damrose EJ (2011) Carbon dioxide laser-assisted endoscopic cricopharyngeal myotomy with primary mucosal closure. Ann Otol Rhinol Laryngol 120:33–39

Article  PubMed  Google Scholar 

Ashman A, Dale OT, Baldwin DL (2016) Management of isolated cricopharyngeal dysfunction: systematic review. J Laryngol Otol 130(7):611–615

Article  CAS  PubMed  Google Scholar 

Hyodo M, Asano K, Nagao A, Hirose K, Nakahira M, Yanagida S, Nishizawa N (2021) Botulinum toxin therapy: a series of clinical studies on patients with Spasmodic dysphonia in Japan. Toxins (Basel) 13(12):840. https://doi.org/10.3390/toxins13120840

Article  CAS  PubMed  Google Scholar 

Schneider I, Thumfart WF, Pototschnig C et al (1994) Treatment of dysfunction of the cricopharyngeal muscle with botulinum A toxin: introduction of a new, noninvasive method. Ann Otol Rhinol Laryngol 103(1):31–35

Article  CAS  PubMed  Google Scholar 

Kelly EA, Koszewski IJ, Jaradeh SS et al (2013) Botulinum toxin injection for the treatment of upper esophageal sphincter dysfunction. Ann Otol Rhinol Laryngol 122:100–108

Article  PubMed  PubMed Central  Google Scholar 

Alfonsi E, Restivo DA, Cosentino G, De Icco R, Bertino G, Schindler A, Todisco M, Fresia M, Cortese A, Prunetti P, Ramusino MC, Moglia A, Sandrini G, Tassorelli C (2017) Botulinum toxin Is effective in the management of neurogenic dysphagia. Clinical-electrophysiological findings and tips on safety in different neurological disorders. Front Pharmacol 8:80. https://doi.org/10.3389/fphar.2017.00080

Article  CAS  PubMed  PubMed Central  Google Scholar 

Wang AY, Kadkade R, Kahrilas PJ et al (2005) Effectiveness of esophageal dilation for symptomatic cricopharyngeal bar. Gastrointest Endosc 61:148–152

Article  PubMed  Google Scholar 

Richtsmeier WJ (2003) Endoscopic management of Zenker diverticulum: the staple-assisted approach. Am J Med 115(3):1–4

Article  Google Scholar 

Rabenstein T, May A, Michel J, Manner H, Pech O, Gossner L, Ell C (2007) Argon plasma coagulation for flexible endoscopic Zenker’s diverticulotomy. Endoscopy 39(2):141–145

Article  CAS  PubMed  Google Scholar 

Zaninotto G, Costantini M, Boccu C et al (1996) Functional and morphological study of the cricopharyngeal muscle in patients with Zenker’s diverticulum. Br J Surg 83(9):1263–1267

CAS  PubMed  Google Scholar 

Pitman M, Weissbrod P (2011) Endoscopic cricopharyngeal myotomy. Oper Tech Otolaryngol - Head Neck Surg 22:135–141

Article  Google Scholar 

Burgos R, Sarto B, Segurola H et al (2012) Traducción y validación de la versión en español de la escala EAT-10 (eating assessment tool-10) para el despistaje de la disfagia [translation and validation of the Spanish version of the EAT-10 (eating assessment Tool-10) for the screening of dysphagia]. Nutr Hosp 27(6):2048–2054

CAS  PubMed  Google Scholar 

Núñez-Batalla F, Corte-Santos P, Señaris-González B et al (2007) Adaptación y validación del índice de incapacidad vocal (VHI-30) y su versión abreviada (VHI-10) al español [adaptation and validation to the Spanish of the voice handicap index (VHI-30) and its shortened version (VHI-10)]. Acta Otorrinolaringol Esp 58(9):386–392

Article  PubMed  Google Scholar 

Calvo-Henríquez C, Ruano-Ravina A, Vaamonde P et al (2019) Translation and validation of the reflux symptom index to Spanish. J Voice 33(5):807.e1-807.e5

Article  PubMed  Google Scholar 

Vázquez de la Iglesia F, Fernández González S, de Gómez ML (2007) Reflujo faringolaríngeo: correlación entre los síntomas y los signos mediante cuestionarios de valoración clínica y fibroendoscópica. Es suficiente para realizar el diagnóstico? [laryngopharyngeal reflux: correlation between symptoms and signs by means of clinical assessment questionnaires and fibroendoscopy. Is this sufficient for diagnosis?]. Acta Otorrinolaringol Esp 58(9):421–425

Article  PubMed  Google Scholar 

Sivarao DV, Goyal RK (2000) Functional anatomy and physiology of the upper esophageal sphincter. Am J Med 108(4):27S – 37

Article  PubMed  Google Scholar 

Haapaniemi JJ, Laurikainen EA, Pulkkinen J et al (2001) Botulinum toxin in the treatment of cricopharyngeal dysphagia. Dysphagia 16(3):171–175

Article  CAS  PubMed  Google Scholar 

Woisard-Bassols V, Alshehri S, Simonetta-Moreau M (2013) The effects of botulinum toxin injections into the cricopharyngeus muscle of patients with cricopharyngeus dysfunction associated with pharyngo-laryngeal weakness. Eur Arch Otorhinolaryngol 270(3):805–815

Article  PubMed  Google Scholar