Phrenic nerve stimulation (PNS) can assess airflow dynamics of the upper airway (UA) during wakefulness in man. Using PNS, we aimed to assess the impact of neck flexion and mouth opening in promoting UA unstability. Measurements were made during nasal breathing in seven healthy subjects (ages = 23-39 yr; one woman). Surface diaphragm electromyogram, esophageal pressure referenced to mask pressure, and flow were recorded during diaphragm twitches with neck in neutral position and mouth closed and then with neck flexion and/or mouth opening. Twitches always exhibited a flow-limited pattern. Flow-limiting driving pressure (Pd) and peak Pd were increased by neck flexion (P < 0.01) without significant change in the corresponding flows. UA resistances at these flow values were higher with the neck flexed (P < 0.05). Mouth opening alone did not exert any significant influence. We conclude that the position of the neck has a discernible impact on the flow behavior through the nonphasically active UA faced with a negative Pd.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1152/jappl.2002.92.1.84 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluating the Use of a 3D Exoscope to Improve Ergonomics in Cleft Surgery.
Cleft Palate Craniofac J
January 2025
Birmingham Childrens Hospital, Birmingham, UK.
The aim of this study was to investigate and compare the technical feasibility, ergonomics, and educational value of the 3D exoscope in comparison with traditional and prism loupes in cleft surgery. A variety of cleft and pharyngeal operations were performed with the VITOM 3D exoscope (Karl Storz GmbH, Tuttlingen, Germany), traditional/prism loupes, and microscope. The cervical neck angulation of the operating surgeon was recorded in real-time with an inertia measurement unit system (Mbient, San Francisco, USA) and experiences of the surgeon and assistant were prospectively evaluated with 5-point Likert scales.
View Article and Find Full Text PDFThe Effects of Manual Therapy with TECAR Therapy, on Pain, Disability and Range of Motion in Women with Non-specific Chronic Neck Pain.
Med J Islam Repub Iran
September 2024
Iranian Center of Excellence in Physiotherapy, Rehabilitation Research Center, Department of Physiotherapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Background: This study was designed to compare the effectiveness of manual therapy alone and a combination of it and TECAR (Transfer Energy Capacitive and Resistive) therapies on the conditions of pain, disability, and neck range of motion (ROM) in patients with non-specific chronic neck pain (NCNP).
Methods: In this Randomized controlled study, 30 women with non-specific chronic neck pain were randomly divided into two groups: Manual therapy along with TECAR therapy (intervention group) and single manual therapy (control group). The participants were homogenized in terms of age, height, and weight.
The effect of unilateral endoscopic arytenoid abduction lateropexy on swallowing in cases of bilateral vocal fold palsy.
Laryngoscope Investig Otolaryngol
February 2025
Objective: Endoscopic arytenoid abduction lateropexy (EAAL) is a minimally invasive surgical technique for the immediate management of bilateral vocal fold palsy (BVFP). Specifically, it achieves a stable and adequate airway by lateralizing the arytenoid cartilage without resecting laryngeal structures. Thus, this study evaluated the effect of EAAL on swallowing in cases of BVFP.
View Article and Find Full Text PDFThis study investigates the impact of the weight and centre of mass (COM) position of Head-Mounted Displays (HMDs) on the subjective evaluation of users during prolonged wearing tasks. This study involved 88 participants completing 1860 sets of experiments under three conditions: sitting still, turning the head, and moving, providing subjective evaluations of wearing HMDs. A static torque testing device was used to simulate neck torque under flexion states.
View Article and Find Full Text PDFPredicting Neck Dysfunction After Open-Door Cervical Laminoplasty - A Prospective Cohort Patient-Reported Outcome Measurement Study.
Neurospine
December 2024
Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan.
Objective: To analyze the predictive factors for neck pain and cervical spine function after laminoplasty for degenerative cervical myelopathy (DCM) using K-means for longitudinal data (KML).
Methods: In this prospective cohort study, we collected clinical and radiographic data from patients with DCM who underwent cervical laminoplasty. A novel index of surgical outcome, "neck function," which comprises neck pain and cervical spine function according to the Japanese Orthopedic Association Cervical Myelopathy Evaluation Questionnaire, was proposed.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!