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isometric neck

Ángel Agis-Torres, Paz Recio, María Elvira López-Oliva, María Pilar Martínez, María Victoria Barahona, Sara Benedito, Salvador Bustamante, Miguel Ángel Jiménez-Cidre, Albino García-Sacristán, Dolores Prieto, Vítor S Fernandes, Medardo Hernández
Nitric oxide (NO) and hydrogen sulfide (H2 S) play a pivotal role in nerve-mediated relaxation of the bladder outflow region. In the bladder neck, a marked phosphodiesterase type 4 (PDE4) expression has also been described and PDE4 inhibitors, as rolipram, produce smooth muscle relaxation. This study investigates the role of PDE4 isoenzyme in bladder neck gaseous inhibitory neurotransmission. We used Western blot and double immunohistochemical staining for the detection of NPP4 (PDE4) and PDE4A and organ baths for isometric force recording to roflumilast and tadalafil, PDE4 and PDE5, respectively, inhibitors in pig and human samples...
March 16, 2018: Scientific Reports
Katrine Tranaas Vannebo, Vegard Moe Iversen, Marius Steiro Fimland, Paul Jarle Mork
BACKGROUND: There is a lack of test-retest reliability studies of measurements of cervical muscle strength, taking into account gender and possible learning effects. OBJECTIVE: To investigate test-retest reliability of measurement of maximal isometric cervical muscle strength by handheld dynamometry. METHODS: Thirty women (age 20-58 years) and 28 men (age 20-60 years) participated in the study. Maximal isometric strength (neck flexion, neck extension, and right/left lateral flexion) was measured on three separate days at least five days apart by one evaluator...
March 2, 2018: Journal of Back and Musculoskeletal Rehabilitation
Josiane Sotrate Gonçalves, Cristiane Shinohara Moriguchi, Karina Satiko Takekawa, Tatiana de Oliveira Sato
OBJECTIVES: The purpose of this study is to evaluate the influence of the work surface and task difficulty on the head, upper back and upper arm postures and activity of the descending trapezius during a simulated mouse task. MATERIAL AND METHODS: Healthy female university students (n=15) were evaluated. The work surface was positioned at the elbow height (EH) and above the elbow height (AEH) and the task difficulty was set at low (LD) and high levels (HD). The postures were recorded by inclinometers...
February 9, 2018: International Journal of Occupational Safety and Ergonomics: JOSE
Bhillie D Luciani, David M Desmet, Amani A Alkayyali, Joshua M Leonardis, David Benjamin Lipps
Neck muscles are preferentially activated in specific force directions, but the constraints that the central nervous system considers when programming these preferred directions of muscle activity are unknown. The current study utilized ultrasound shear wave elastography (SWE) to investigate whether the material properties of the sternocleidomastoid (SCM) muscles exhibit preferred directions similar to their preferred direction of muscle activity during an isometric task. Twenty-four healthy participants matched isometric forces in 16 axial directions...
February 8, 2018: Journal of Applied Physiology
Bara Alsalaheen, Ryan Bean, Andrea Almeida, James Eckner, Matthew Lorincz
BACKGROUND: The majority of studies examining the role of cervical muscles on head-neck kinematics focused on musculoskeletal attributes (e.g. strength). Cervical neuromuscular response to perturbation may represent a divergent construct that has not been examined under various perturbation conditions. This study examined the association between cervical musculoskeletal attributes and cervical neuromuscular response of the sternocleidomastoid (SCM) to perturbation. Furthermore, this study examined the effect of anticipation and preload on the SCM neuromuscular response...
February 2, 2018: Journal of Electromyography and Kinesiology
S Oezdemir, M Komp, P Hahn, S Ruetten
OBJECTIVE: Resection of a cervical disc herniation using a full-endoscopic technique with an anterior approach. INDICATION: Fresh disc herniation with monoradicular symptoms in the upper extremity. CONTRAINDICATIONS: Pure neck pain, cervical myelopathy, older and calcified disc herniations, higher grade of instability and deformity. SURGICAL TECHNIQUE: Introduction of a guidewire and dilatator to a cervical disc using an anterior approach...
February 1, 2018: Operative Orthopädie und Traumatologie
Thomas J Hureau, Joshua C Weavil, Taylor S Thurston, Ryan M Broxterman, Ashley D Nelson, Amber D Bledsoe, Jacob E Jessop, Russell S Richardson, D Walter Wray, Markus Amann
This study sought to comprehensively investigate the role of metabolically and mechanically sensitive group III/IV muscle afferents in carotid baroreflex responsiveness and resetting during both electrically-evoked (EVO, no central command) and voluntary (VOL, requiring central command) isometric single-leg knee-extension (15% of MVC) exercise. Participants (n = 8) were studied under control conditions (CTRL) and following lumbar intrathecal fentanyl injection (FENT) to inhibit μ-opioid receptor-sensitive lower limb muscle afferents...
February 1, 2018: Journal of Physiology
SinHo Chung, Yeon-Gyu Jeong
INTRODUCTION: The present study compared the effects of neck isometric exercise (NIE) and craniocervical flexion exercise (CFE) on cervical lordosis, muscle endurance of cervical flexion, neck disability index (NDI), and active cervical range of motion (ACROM) in all three planes in patients with non-specific, chronic neck pain (CNP). MATERIALS AND METHODS: Forty-one patients from a university hospital-based rehabilitation center were randomly assigned to an experimental (22 patients performing CFE) or control (19 patients performing NIE) group...
January 24, 2018: Physiotherapy Theory and Practice
S Oezdemir, M Komp, P Hahn, S Ruetten
OBJECTIVE: Resection of a cervical disc herniation using a full-endoscopic technique with an anterior approach. INDICATION: Fresh disc herniation with monoradicular symptoms in the upper extremity. CONTRAINDICATIONS: Pure neck pain, cervical myelopathy, older and calcified disc herniations, higher grade of instability and deformity. SURGICAL TECHNIQUE: Introduction of a guidewire and dilatator to a cervical disc using an anterior approach...
January 9, 2018: Operative Orthopädie und Traumatologie
Fereshte Goodarzi, Leila Rahnama, Noureddin Karimi, Raziyeh Baghi, Shapour Jaberzadeh
OBJECTIVE: This study aimed to compare neck extensor muscle thickness, thickness changes, and strength between participants with forward head posture (FHP) and controls with normal head posture (NHP). METHODS: Twenty college students with FHP (mean age 21.30 ± 2.36 years) and 20 students with NHP (mean age 21.85 ± 2.78 years) participated in this case-control study. The thickness of neck extensor muscles was measured at rest and at maximal voluntary isometric contraction (MVIC)...
December 13, 2017: Journal of Manipulative and Physiological Therapeutics
Erdem Atalay, Bedrettin Akova, Hakan Gür, Ufuk Sekir
The present study aimed to analyze the impacts of a low back rehabilitation program accompanied with neck, shoulder and upper back exercises on pain, disability, and physical characteristics of patients with chronic low back pain. Twenty sedentary male patients with chronic low back pain participated in the study on a voluntary basis. The patients were randomly allocated into two groups: a conventional low back exercise group (CE) and a supported exercise group (SE; CE plus upper back, neck, and shoulder exercises)...
December 2017: Journal of Sports Science & Medicine
C Deeney, L W O'Sullivan
Background: Musculoskeletal disorders (MSDs) are particularly common in the shoulder/neck region for some tasks that involve low force exertions, for example computer work. It has been demonstrated that muscle activity may be stimulated by cognitively demanding tasks. There is a lack of studies on the relationship between qualitative levels of cognitive loading, level of muscle activity, and muscle fatigue. Aims: To investigate the effects of quantitative levels of cognitive loading on conduction velocity changes and isometric endurance times for the upper trapezius...
November 19, 2017: Occupational Medicine
Naime Uluğ, Öznur Tunca Yılmaz, Murat Kara, Levent Özçakar
BACKGROUND: Various studies have shown the efficacy of conventional isometric, Pilates and yoga exercises. However, data on the effects and comparison of these specific exercises on the cervical muscle morphology are insufficient or lacking. OBJECTIVE: To investigate the effects of different exercise treatments on neck muscles in patients with chronic neck pain. DESIGN: A randomized study. METHODS: Fifty-six patients with chronic neck pain were randomized into 3 groups as follows: Pilates group (n = 20), yoga group (n = 18) and isometric group (n = 18)...
November 16, 2017: Journal of Rehabilitation Medicine
Takayoshi Hakkaku, Koichi Nakazato, Koji Koyama, Karina Kouzaki, Kenji Hiranuma
Background: Stinger syndrome frequently occurs in athletes who compete in collision sports. Sharp pain and impairment of neck motion are major symptoms. Cervical intervertebral disc degeneration (CIDD) is also frequently observed in those who compete in collision sports. Purpose/Hypothesis: To investigate whether CIDD and neck functionality are related to a history of stinger syndrome. The hypothesis was that a significant relationship exists between CIDD and neck motion and a history of stinger syndrome in Japanese collegiate football players...
November 2017: Orthopaedic Journal of Sports Medicine
Peter Le, Alexander Aurand, Thomas M Best, Safdar N Khan, Ehud Mendel, William S Marras
Objective Develop a coactivation index for the neck and test its effectiveness with complex dynamic head motions. Background Studies describing coactivation for the cervical spine are sparse in the literature. Of those in existence, they were either limited to a priori definitions of agonist/antagonist activity that limited the testing to sagittal and lateral planes or consisted of isometric exertions. Multiplanar movements would allow for a more realistic understanding of naturalistic movements in the cervical spine and propensity for neck pain...
November 1, 2017: Human Factors
Marina Machado Cid, Leticia Bergamin Januario, Gisele Garcia Zanca, Stela Marcia Mattiello, Ana Beatriz Oliveira
OBJECTIVE: To evaluate within- and between-days reliability of two normalization methods of surface electromyography (sEMG) recordings of the trapezius muscle. METHODS: Nineteen women were allocated into 2 groups (healthy and with neck-shoulder pain). The sEMG was recorded in two sessions with 7 days in between sessions. The four portions of the trapezius muscle (the clavicular and acromial fibers of the upper trapezius, the middle and the lower trapezius) were evaluated during maximal and submaximal isometric voluntary contractions...
September 29, 2017: Brazilian Journal of Physical Therapy
W J Choi, S N Robinovitch, S A Ross, J Phan, D Cipriani
Falls are a common cause of traumatic brain injuries (TBI) across the lifespan. A proposed but untested hypothesis is that neck muscle activation influences impact severity and risk for TBI during a fall. We conducted backward falling experiments to test whether activation of the neck flexor muscles facilitates the avoidance of head impact, and reduces impact velocity if the head contacts the ground. Young adults (n=8) fell from standing onto a 30cm thick gymnastics mat while wearing a helmet. Participants were instructed to fall backward and (a) prevent their head from impacting the mat ("no head impact" trials); (b) allow their head to impact the mat, but with minimal impact severity ("soft impact" trials); and (c) allow their head to impact the mat, while inhibiting efforts to reduce impact severity ("hard impact" trials)...
August 16, 2017: Clinical Biomechanics
Hashimoto Takuya, Tsukagoshi Keita, Koike Takuji
Difficulty of swallowing, called dysphagia, leads to aspiration pneumonia which is particularly a big health concern in aging societies. Therefore, prevention and treatment of dysphagia would contribute to extending healthy-life and QOL of elderly people and decreasing healthcare cost. Robotics technologies are expected as one of the effective methods to solve the problem in terms of detecting malfunction in swallowing and recovering swallowing function. The aim of this study is to investigate muscle activity during normal swallowing using mechanomyography (MMG) with PolyVinylidene DiFluoride (PVDF) film which is a ferroelectrics polymer...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
Pejana Rastovic, Marija Definis Gojanovic, Marina Berberovic, Marko Pavlovic, Josip Lesko, Gordan Galic, Maja Pandza
BACKGROUND: Whiplash-associated disorders (WAD) result from injury of neck structures that most often occur during traffic accidents as a result of rapid acceleration-deceleration. The dominant symptoms manifest in the musculoskeletal system and include increased fatigue. Because of the frequency of whiplash injuries, a simple, cheap and useful diagnostic tool is needed to differentiate whiplash injury from healthy patients or those faking symptoms. OBJECTIVES: To determine muscle fatigue in patients with whiplash injury in six body positions...
July 2017: Annals of Saudi Medicine
Gary Fryer, Michael Bird, Barry Robbins, Jane C Johnson
This single group, randomized, cross-over study explored whether manual therapy alters motor tone of deep thoracic back muscles by examining resting electromyographic activity (EMG) after 2 types of manual therapy and a sham control intervention. Twenty-two participants with thoracic spinal pain (15 females, 7 males, mean age 28.1 ± 6.4 years) had dual fine-wire, intramuscular electrodes inserted into deep transversospinalis muscles at a thoracic level where tissues appeared abnormal to palpation (AbP) and at 2 sites above and below normal and non-tender to palpation (NT)...
July 2017: Journal of Bodywork and Movement Therapies
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