Quantification of rat supraglottic laryngeal sensation threshold

2017 ◽  
Vol 127 (8) ◽  
pp. E265-E269
Author(s):  
Derrick C. Gale ◽  
Neel K. Bhatt ◽  
Randal C. Paniello
Keyword(s):  
Laryngeal Sensation

Vocal Shadowing Under Conditions of Normal and Altered Laryngeal Sensation

1979 ◽  
Vol 22 (4) ◽  
pp. 794-817 ◽  
Author(s):  
Rebecca J. Leonard ◽  
Robert L. Ringel
Keyword(s):  
Laryngeal Sensation

Sensory Testing in the Assessment of Laryngeal Sensation in Patients with Amyotrophic Lateral Sclerosis

2006 ◽  
Vol 115 (7) ◽  
pp. 528-534 ◽  
Author(s):  
Milan R. Amin ◽  
Donna Harris ◽  
Stacy Gallese Cassel ◽  
Eric Grimes ◽  
Terry Heiman-Patterson
Keyword(s):  
Amyotrophic Lateral Sclerosis ◽  
Sensory Testing ◽  
Laryngeal Sensation ◽  
Lateral Sclerosis

Altered Laryngeal Sensation: A Potential Cause of Apnea of Infancy

2005 ◽  
Vol 114 (4) ◽  
pp. 258-263 ◽  
Author(s):  
Dana M. Thompson ◽  
Michael J. Rutter ◽  
J. Paul Willging ◽  
Colin D. Rudolph ◽  
Robin T. Cotton
Keyword(s):  
Gestational Age ◽  
Comparison Group ◽  
Respiratory Control ◽  
Upper Airway ◽  
Upper Respiratory Tract ◽  
Postconceptional Age ◽  
Laryngeal Sensation ◽  
Delayed Maturation ◽  
Laryngeal Adductor Reflex ◽  
Secretion Clearance

Delayed maturation of respiratory control of breathing and the laryngeal adductor reflex (LAR) are commonly implicated in infant apnea. A swallow response occurs to remove the stimulus from the pharynx to prevent aspiration once the glottis reopens. Induction of apnea by poorly cleared endogenous upper airway secretions has been postulated to be a potential cause of infant apnea. Our purpose was to determine whether alteration in the LAR, an indicator of laryngeal sensation, and the presence of secretions influenced the responsiveness of the LAR in infants with apnea. The LAR was induced in 20 infants with apnea (median gestational age, 36.5 weeks) by application of air pulses of controlled duration (50 ms) and intensity (2.5 to 10 mm Hg) to the aryepiglottic fold. Twenty infants evaluated for upper respiratory tract anomalies were used as a comparison group (median gestational age, 39 weeks). The infants with apnea required higher-intensity stimuli (p < .001) to induce the LAR (6.2 ± 1.6 mm Hg) than did the comparison group (4.3 ± 1.0 mm Hg) and demonstrated poorer clearance of secretions (p < .001). These findings were significant even when we adjusted for postconceptional age at the time of the test (p = .007). The findings of this study suggest that decreased laryngeal sensitivity results in poor endogenous secretion clearance and that it may induce a prolonged glottic closure event to prevent aspiration. This closure may play a role in infant apnea.

Role of Flexible Laryngoscopy in Evaluating Aspiration

1997 ◽  
Vol 106 (8) ◽  
pp. 705-709 ◽  
Author(s):  
Glenn M. Kaye ◽  
Richard D. Zorowitz ◽  
Soly Baredes
Keyword(s):  
Vocal Cord ◽  
Pharyngeal Residue ◽  
Flexible Laryngoscopy ◽  
Glottic Closure ◽  
Vocal Cord Mobility ◽  
Laryngeal Sensation ◽  
Gag Reflex ◽  
Highly Correlated ◽  
Risk Of Aspiration

Flexible fiberoptic laryngoscopy is used to evaluate dysphagia, but its clinical utility has not been compared to that of the videofluorographic swallowing study (VFSS). This study correlates parameters of both procedures and identifies laryngoscopy predictors of aspiration in 105 patients. Presence of aspiration, pharyngeal residue, laryngeal sensation, vocal cord mobility, and glottic closure during flexible laryngoscopy (FL), and gag reflex were correlated with aspiration during the VFSS. An algorithm for laryngoscopically detecting aspiration was synthesized. Aspiration (p = .004) and pharyngeal residue (p < .00001) were highly correlated between the two studies. Aspiration during the VFSS was correlated with pharyngeal residue (p < .00001) and laryngeal sensation (p = .027) during FL, but not glottic closure (p = .169) nor vocal cord mobility (p = .056). Patients with a normal gag reflex and without aspiration or pharyngeal residue during FL had a 2.94% risk of aspiration during the VFSS. Flexible laryngoscopy can be used as a relatively safe, portable screening test for aspiration, but cannot always replace the VFSS to identify the presence or cause of aspiration.

scholarly journals Central nervous system integration of sensorimotor signals in oral and pharyngeal structures: oropharyngeal kinematics response to recurrent laryngeal nerve lesion

2016 ◽  
Vol 120 (5) ◽  
pp. 495-502 ◽  
Author(s):  
Francois D. H. Gould ◽  
Jocelyn Ohlemacher ◽  
Andrew R. Lammers ◽  
Andrew Gross ◽  
Ashley Ballester ◽  
...  
Keyword(s):  
Recurrent Laryngeal Nerve ◽  
High Speed ◽  
Motor Coordination ◽  
Cranial Nerves ◽  
Laryngeal Nerve ◽  
Nerve Lesion ◽  
Airway Protection ◽  
Liquid Feeding ◽  
Laryngeal Sensation ◽  
Central Coordination

Safe, efficient liquid feeding in infant mammals requires the central coordination of oropharyngeal structures innervated by multiple cranial and spinal nerves. The importance of laryngeal sensation and central sensorimotor integration in this system is poorly understood. Recurrent laryngeal nerve lesion (RLN) results in increased aspiration, though the mechanism for this is unclear. This study aimed to determine the effect of unilateral RLN lesion on the motor coordination of infant liquid feeding. We hypothesized that 1) RLN lesion results in modified swallow kinematics, 2) postlesion oropharyngeal kinematics of unsafe swallows differ from those of safe swallows, and 3) nonswallowing phases of the feeding cycle show changed kinematics postlesion. We implanted radio opaque markers in infant pigs and filmed them pre- and postlesion with high-speed videofluoroscopy. Markers locations were digitized, and swallows were assessed for airway protection. RLN lesion resulted in modified kinematics of the tongue relative to the epiglottis in safe swallows. In lesioned animals, safe swallow kinematics differed from unsafe swallows. Unsafe swallow postlesion kinematics resembled prelesion safe swallows. The movement of the tongue was reduced in oral transport postlesion. Between different regions of the tongue, response to lesion was similar, and relative timing within the tongue was unchanged. RLN lesion has a pervasive effect on infant feeding kinematics, related to the efficiency of airway protection. The timing of tongue and hyolaryngeal kinematics in swallows is a crucial locus for swallow disruption. Laryngeal sensation is essential for the central coordination in feeding of oropharyngeal structures receiving motor inputs from different cranial nerves.

scholarly journals Laryngeal sensation and its association with aspiration and cough in children with neurological impairment

2021 ◽  
Author(s):  
Nadine Freitag ◽  
Pia Tews ◽  
Nicole Hübl ◽  
Katrin Krug ◽  
Julia Kristin ◽  
...  
Keyword(s):  
Neurological Impairment ◽  
Laryngeal Sensation

scholarly journals Innovations in Flexible Endoscopic Evaluation of Swallowing and Laryngeal Sensation Testing

2015 ◽  
Vol 5 (1) ◽  
pp. 17-19
Author(s):  
Shamik Paresh Mehta
Keyword(s):  
Endoscopic Evaluation ◽  
Laryngeal Sensation ◽  
Clinical Tools ◽  
Crucial Part ◽  
Sensory Tests

ABSTRACT The larynx plays a crucial part in swallowing to prevent aspiration. The present available clinical tools to assess this function of larynx are ‘flexible endoscopic evaluation of swallowing’ (FEES) and ‘laryngeal sensory tests’. The author has made certain changes to make these tests equally effective and economical. How to cite this article Mehta SP. Innovations in Flexible Endoscopic Evaluation of Swallowing and Laryngeal Sensation Testing. Int J Phonosurg Laryngol 2015;5(1):17-19

Long-term Swallowing Function, Pulmonary Complications, and Quality of Life after Supracricoid Laryngectomy

2019 ◽  
Vol 161 (2) ◽  
pp. 307-314 ◽  
Author(s):  
Davide Di Santo ◽  
Stefano Bondi ◽  
Leone Giordano ◽  
Andrea Galli ◽  
Michele Tulli ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Pulmonary Complications ◽  
Oral Feeding ◽  
Postoperative Rehabilitation ◽  
Swallowing Function ◽  
Cough Reflex ◽  
Laryngeal Sensation

Objectives Long-term effects of supracricoid laryngectomies are nowadays under discussion. The purpose of this study was to detect the prevalence of chronic aspiration and incidence of pulmonary complications, to investigate possible influencing factors, and to analyze dysphagia-related quality of life in a cohort of patients who recovered swallowing function after undergoing supracricoid laryngectomies. Study Design Retrospective observational study. Setting San Raffaele Hospital, Vita-Salute University, Milan, Italy. Methods A cohort of 39 patients who recovered swallowing function free of disease after a minimum 3-year follow-up period was retrospectively investigated between October and December 2017—clinically with the Pearson’s Scale and M. D. Anderson Dysphagia Inventory and instrumentally with fiberoptic endoscopic evaluation of swallowing. Results Chronic aspiration was demonstrated in a significant portion of patients (clinically in 33.3% and instrumentally in 35.9%). Aspiration was influenced by advanced age at surgery ( P = .020). Type of surgical procedure, resection of 1 arytenoid cartilage, postoperative rehabilitation with a speech-language therapist, radiotherapy, age at consultation, and length of follow-up did not influence the prevalence of aspiration. Pulmonary complications affected 5 patients; incidence of pulmonary complications was related to aspiration and was favored by poor laryngeal sensation/cough reflex. Aspiration significantly affected quality of life. Conclusions Chronic aspiration is frequent and affects patients’ quality of life. However, incidence of pulmonary complications is low; therefore, oral feeding should not be contraindicated for aspirating patients. Preservation of laryngeal sensation and cough reflex is mandatory to prevent pulmonary complications.

Laryngeal sensation and pharyngeal delay time after (chemo)radiotherapy

2013 ◽  
Vol 271 (8) ◽  
pp. 2299-2304 ◽  
Author(s):  
Takashi Maruo ◽  
Yasushi Fujimoto ◽  
Kikuko Ozawa ◽  
Mariko Hiramatsu ◽  
Atsushi Suzuki ◽  
...  
Keyword(s):  
Delay Time ◽  
Laryngeal Sensation
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