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Swallowing physiology

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https://www.readbyqxmd.com/read/29330951/dynamic-musculoskeletal-functional-morphology-integrating-dicect-and-xromm
#1
Courtney P Orsbon, Nicholas J Gidmark, Callum F Ross
The tradeoff between force and velocity in skeletal muscle is a fundamental constraint on vertebrate musculoskeletal design (form:function relationships). Understanding how and why different lineages address this biomechanical problem is an important goal of vertebrate musculoskeletal functional morphology. Our ability to answer questions about the different solutions to this tradeoff has been significantly improved by recent advances in techniques for quantifying musculoskeletal morphology and movement. Herein, we have three objectives: (1) review the morphological and physiological parameters that affect muscle function and how these parameters interact; (2) discuss the necessity of integrating morphological and physiological lines of evidence to understand muscle function and the new, high resolution imaging technologies that do so; and (3) present a method that integrates high spatiotemporal resolution motion capture (XROMM, including its corollary fluoromicrometry), high resolution soft tissue imaging (diceCT), and electromyography to study musculoskeletal dynamics in vivo...
February 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29318323/-correction-to-the-physiologic-and-the-pathologic-swallowing-process
#2
S Cantemir
No abstract text is available yet for this article.
January 9, 2018: HNO
https://www.readbyqxmd.com/read/29298528/s-nitrosoglutathione-formation-at-gastric-ph-is-augmented-by-ascorbic-acid-and-by-the-antioxidant-vitamin-complex-resiston
#3
Vitali I Stsiapura, Ilya Bederman, Ivan I Stepuro, Tatiana S Morozkina, Stephen J Lewis, Laura Smith, Benjamin Gaston, Nadzeya Marozkina
CONTEXT: Exogenous nitrogen oxides must be made bioavailable to sustain normal physiology because nitric oxide synthase (NOS) deficient mice are viable. In the stomach, S-nitrosoglutathione (GSNO) is formed from ingested nitrite and high levels of airway glutathione (GSH) that are cleared and swallowed. However, gastric GSNO may be broken down by nutrients like ascorbic acid (AA) before it is absorbed. OBJECTIVE: To study the effect of AA on GSNO formation and stability...
December 2018: Pharmaceutical Biology
https://www.readbyqxmd.com/read/29218488/effect-of-body-position-on-pharyngeal-swallowing-pressures-using-high-resolution-manometry
#4
Sarah P Rosen, Suzan M Abdelhalim, Corinne A Jones, Timothy M McCulloch
The effect of body position and gravitational pull on the complex pressure-driven process of pharyngeal swallowing remains unknown. Using high-resolution manometry (HRM), this study aims to identify positional adaptations of pharyngeal physiology by evaluating swallowing pressure patterns in a series of inverted body positions. Ten healthy adults each underwent swallowing tasks with pharyngeal HRM at six body positions using an inversion table (0°[upright], 45°, 90°[supine], 110°, 135°, and 180°[fully inverted])...
December 7, 2017: Dysphagia
https://www.readbyqxmd.com/read/29205379/in-vivo-measurement-of-swallowing-by-monitoring-thyroid-cartilage-movement-in-healthy-subjects-using-thickened-liquid-samples-and-its-comparison-with-sensory-evaluation
#5
Takahiro Funami, Shingo Matsuyama, Akira Ikegami, Makoto Nakauma, Kazuhiro Hori, Takahiro Ono
This research aimed to investigate the relationship between in vivo measurement of swallowing and sensory evaluation using thickened liquids as model foods. Healthy subjects (8 male and average 29.6-year old) participated in both tests, in which the subjects were asked to swallow the whole amount of sample (10 ml) at one time. In vivo measurement monitored thyroid cartilage movement during swallowing using a bendable pressure sensor synchronously with suprahyoid electromyography, whereas sensory evaluation measured perceived cohesiveness and adhesiveness on a visual analogue scale...
December 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/29205054/best-practices-protocol-for-the-evaluation-of-bulbar-dysfunction-summary-recommendations-from-the-neals-bulbar-subcommittee-symposium
#6
Gary L Pattee, Emily K Plowman, Benjamin R Brooks, James D Berry, Nazem Atassi, Jennifer L Chapin, Kendrea Garand, Yana Yunusova, Courtney E Mcilduff, Eufrosina Young, John M Costello, Eric A Macklin, Eduardo R Locatelli, Vincenzo Silani, Daragh Heitzman, James Wymer, Stephen A Goutman, Deborah F Gelinas, Richard Smith, Bridget Perry, Paige Nalipinski, Kaila Stipancic, Meghan O'Brien, Stacey L Sullivan, Jordan Green
OBJECTIVE: The aim of this Symposium was to develop a consensus based, bulbar assessment protocol for implementation within NEALS clinics. METHODS: A one-day symposium, held in April 2017, was organized into Speech and Swallowing sections to establish summary recommendations for the assessment of bulbar dysfunction within each group. RESULTS: Summary recommendations included speech referrals and AAC evaluations at initial visit, CNS-BFS, maximum sustained phonation, and speaking rate...
December 5, 2017: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
https://www.readbyqxmd.com/read/29201389/the-feasibility-of-assessing-swallowing-physiology-following-prolonged-intubation-after-cardiovascular-surgery
#7
Stacey A Skoretz, Terrence M Yau, John T Granton, Rosemary Martino
Background: Dysphagia following prolonged intubation after cardiovascular (CV) surgery is common occurring in 67% of patients; however, this population's swallowing physiology has never been prospectively evaluated using standardized methods. Hence, prior to conducting a larger study, our primary objective was to determine the feasibility of assessing swallowing physiology using instrumentation and validated interpretation methods in cardiovascular surgical patients following prolonged intubation...
2017: Pilot and Feasibility Studies
https://www.readbyqxmd.com/read/29157238/evaluation-of-normal-swallowing-functions-by-using-dynamic-high-density-surface-electromyography-maps
#8
Mingxing Zhu, Bin Yu, Wanzhang Yang, Yanbing Jiang, Lin Lu, Zhen Huang, Shixiong Chen, Guanglin Li
BACKGROUND: Swallowing is a continuous process with substantive interdependencies among different muscles, and it plays a significant role in our daily life. The aim of this study was to propose a novel technique based on high-density surface electromyography (HD sEMG) for the evaluation of normal swallowing functions. METHODS: A total of 96 electrodes were placed on the front neck to acquire myoelectric signals from 12 healthy subjects while they were performing different swallowing tasks...
November 21, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29147919/alterations-to-swallowing-physiology-as-the-result-of-effortful-swallowing-in-healthy-seniors
#9
Sonja M Molfenter, Chuan-Ya Hsu, Ying Lu, Cathy L Lazarus
A significant proportion of healthy seniors report difficulty swallowing, thought to result from age-related decline in muscle bulk/function. Effortful Swallowing (ES) is used both as a compensatory maneuver to improve pharyngeal propulsion/clearance and has been proposed as an exercise to improve pharyngeal strength. This study sought to quantify the immediate kinematic, temporal, and functional changes during an ES maneuver to quantify its exercise potential to combat age-related changes in swallowing. Videofluoroscopy data were collected from 44 healthy seniors (21 male) over 65 years old (mean = 76...
November 17, 2017: Dysphagia
https://www.readbyqxmd.com/read/29144056/oropharyngeal-dysphagia-profiles-in-individuals-with-oculopharyngeal-muscular-dystrophy
#10
L C Tabor, E K Plowman, C Romero-Clark, S Youssof
BACKGROUND: Although dysphagia represents a hallmark manifestation of oculopharyngeal muscular dystrophy (OPMD), limited knowledge exists regarding the underlying nature of oropharyngeal swallowing impairments in this patient population. We aimed to delineate global pharyngeal dysphagia profiles in OPMD and identify the prevalence and physiologic associations of impairments in swallowing safety and efficiency. METHODS: Twenty-two individuals with OPMD completed a videofluoroscopic swallowing evaluation...
November 16, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29123186/the-biomechanical-coordination-during-oropharyngeal-swallowing-an-evaluation-with-a-non-invasive-sensing-system
#11
Qiang Li, Yoshitomo Minagi, Takahiro Ono, Yongjin Chen, Kazuhiro Hori, Shigehiro Fujiwara, Yoshinobu Maeda
Swallowing is a very important and complex physiological behaviour. The dynamic of swallowing has created great interest as any procedural abnormality will result in dysphagia and even lower quality of life. However, a non-invasive evaluation of biomechanical coordination during oropharyngeal swallowing, which includes the activities of the tongue, the hyoid and swallowing-related muscles, has not yet been achieved. In the present study, we recruited fifteen subjects, and a non-invasive sensing system composed of a pressure sensor, a bend sensor, surface electrodes and a microphone was created to simultaneously monitor tongue pressure, hyoid motion, and surface EMG of swallowing-related muscles, as well as take sound recordings, when the subjects swallowed 5 ml of water...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29103061/the-use-of-surface-electromyography-in-dysphagia-evaluation
#12
Yao-Chin Wang, Willy Chou, Bor-Shing Lin, Jhi-Joung Wang, Bor-Shyh Lin
Dysphagic patients usually have a variety of clinical problems such as malnutrition, significant weight loss, and aspiration pneumonia. Dysphagia is a complication commonly caused by strokes, and surface electromyography (sEMG) provides a simple, non-radioactive, and non-invasive method to measure the patterns of muscle activity during swallowing, allowing clinicians to describe the physiology of swallowing behavior. Most previous studies have described swallowing behavior in terms of amplitude and duration...
October 23, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29071968/-clinical-trials-for-treatment-of-stroke-patients-with-dysphagia-by-vitalstim-electroacupuncture-combined-with-swallowing-rehabilitation-training
#13
Sheng-Yu Zhang, Shao-Bing Liu, Wei Wu, Yi-Min Chen, Kang-Lin Liao, Yong Xiang, Dun Pan
OBJECTIVE: To observe the clinical effect of vitalstim electroacupuncture (EA) combined with swallowing rehabilitation training in the treatment of stroke patients with dysphagia. METHODS: A total of 80 stroke patients with dysphagia were randomized into treatment and control groups (n=40 in each group). Patients of the control group were treated by regular medication for anti-platelet aggregation and anti-coagulation, lipid-lowering, neuroprotection, blood glucose control and blood pressure control, etc...
April 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29069620/propofol-protects-rat-hypoglossal-motoneurons-in-an-in-vitro-model-of-excitotoxicity-by-boosting-gabaergic-inhibition-and-reducing-oxidative-stress
#14
Filippo Ghezzi, Laura Monni, Silvia Corsini, Rossana Rauti, Andrea Nistri
In brainstem motor networks, hypoglossal motoneurons (HMs) play the physiological role of driving tongue contraction, an activity critical for inspiration, phonation, chewing and swallowing. HMs are an early target of neurodegenerative diseases like amyotrophic lateral sclerosis that, in its bulbar form, is manifested with initial dysphagia and dysarthria. One important pathogenetic component of this disease is the high level of extracellular glutamate due to uptake block that generates excitotoxicity. To understand the earliest phases of this condition we devised a model, the rat brainstem slice, in which block of glutamate uptake is associated with intense bursting of HMs, dysmetabolism and death...
October 22, 2017: Neuroscience
https://www.readbyqxmd.com/read/29063658/physiological-augmentation-of-esophageal-distension-pressure-and-peristalsis-during-conditions-of-increased-esophageal-emptying-resistance
#15
G J Brink, W Y Lei, T I Omari, M M J Singendonk, J S Hung, T T Liu, C H Yi, C L Chen
BACKGROUND: Abdominal compression has been implemented as a provocative maneuver in high-resolution impedance manometry (HRIM) to "challenge" normal esophageal physiology with the aim of revealing abnormal motor patterns which may explain symptoms. In this study, we measured the effects of abdominal compression on esophageal functioning utilizing novel pressure-impedance parameters and attempted to identify differences between healthy controls and globus patients. METHODS: Twenty-two healthy volunteers (aged 23-32 years, 41% female) and 22 globus patients (aged 23-72 years, 68% female) were evaluated with HRIM using a 3...
October 24, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29054835/a-strategy-to-reduce-critical-cardiorespiratory-alarms-due-to-intermittent-enteral-feeding-of-preterm-neonates-in-intensive-care
#16
Rohan Joshi, Carola van Pul, Anouk Sanders, Hans Weda, Jan Willem Bikker, Loe Feijs, Peter Andriessen
BACKGROUND: Many preterm infants require enteral feeding as they cannot coordinate sucking, swallowing, and breathing. In enteral feeding, milk feeds are delivered through a small feeding tube passed via the nose or mouth into the stomach. Intermittent milk feeds may either be administered using a syringe to gently push milk into the infant's stomach (push feed) or milk can be poured into a syringe attached to the tube and allowed to drip in by gravity (gravity feed). This practice of enteral feeding is common in neonatal intensive care units...
October 20, 2017: Interactive Journal of Medical Research
https://www.readbyqxmd.com/read/29043407/changes-in-swallowing-symptoms-and-esophageal-motility-after-thyroid-surgery-a-prospective-cohort-study
#17
Jesper Roed Sorensen, Simone Markoew, Helle Døssing, Laszlo Hegedüs, Steen Joop Bonnema, Christian Godballe
INTRODUCTION: Swallowing difficulties, the pathophysiology behind which is incompletely understood, have been reported in 47-83% of goiter patients referred for thyroidectomy. We aimed at examining the influence of thyroid surgery on swallowing symptoms and esophageal motility. METHODS: Thirty-three patients with benign nodular goiter undergoing thyroid surgery were included. All completed high-resolution esophageal manometry examinations and the goiter symptom scale score, assessed by the thyroid-specific patient-reported outcome measure...
October 11, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29041932/stamps-development-and-verification-of-swallowing-kinematic-analysis-software
#18
Woo Hyung Lee, Changmook Chun, Han Gil Seo, Seung Hak Lee, Byung-Mo Oh
BACKGROUND: Swallowing impairment is a common complication in various geriatric and neurodegenerative diseases. Swallowing kinematic analysis is essential to quantitatively evaluate the swallowing motion of the oropharyngeal structures. This study aims to develop a novel swallowing kinematic analysis software, called spatio-temporal analyzer for motion and physiologic study (STAMPS), and verify its validity and reliability. METHODS: STAMPS was developed in MATLAB, which is one of the most popular platforms for biomedical analysis...
October 17, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29041008/increase-of-substance-p-concentration-in-saliva-after-pharyngeal-electrical-stimulation-in-severely-dysphagic-stroke-patients-an-indicator-of-decannulation-success
#19
Paul Muhle, Sonja Suntrup-Krueger, Stefan Bittner, Tobias Ruck, Inga Claus, Thomas Marian, Jens B Schröder, Jens Minnerup, Tobias Warnecke, Sven G Meuth, Rainer Dziewas
BACKGROUND/AIMS: Substance P (SP) is a neuropeptide, likely acting as a neurotransmitter in the pharyngeal mucosa enhancing the swallow and cough reflex. Pharyngeal Electrical Stimulation (PES) induces a temporary increase of salivary SP levels in healthy adults. Previous evidence suggests that post-stroke dysphagia is related to reduced SP levels. Here, we investigated the effects of PES on SP levels in severely dysphagic stroke patients and a possible link between increase of SP and treatment success...
October 17, 2017: Neuro-Signals
https://www.readbyqxmd.com/read/29026386/effect-of-posture-on-swallowing
#20
Ahmad H Alghadir, Hamayun Zafar, Einas S Al-Eisa, Zaheen A Iqbal
BACKGROUND: Swallowing is a systematic process. Any structural, physiological or neurological disturbance in this process may cause dysphagia. Although there are studies that report head/neck movements during mastication, there are fewer studies that show the effect of different head/neck postures on difficulty while swallowing. OBJECTIVES: To observe the effect of different body postures on the self-perceived difficulty while swallowing in normal healthy subjects...
March 2017: African Health Sciences
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