1,720,984 research outputs found

    Alterations in Masticatory Muscle Activation in People with Persistent Neck Pain Despite the Absence of Orofacial Pain or Temporomandibular Disorders

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    Aim: To assess whether patients with persistent neck pain display evidence of altered masticatory muscle behavior during a jaw-clenching task, despite the absence of orofacial pain or temporomandibular disorders. Methods: Ten subjects with persistent, nonspecific neck pain and 10 age- and sex-matched healthy controls participated. Maximal voluntary contractions (MVCs) of unilateral jaw clenching followed by 5-second submaximal contractions at 10%, 30%, 50%, and 70% MVC were recorded by two flexible force transducers positioned between the first molar teeth. Task performance was quantified by mean distance and offset error from the reference target force as error indices, and standard deviation of force was used as an index of force steadiness. Electromyographic (EMG) activity was recorded bilaterally from the masseter muscle with 13 x 5 grids of electrodes and from the anterior temporalis with bipolar electrodes. Normalized EMG root mean square (RMS) was computed for each location of the grid to form a map of the EMG amplitude distribution, and the average normalized RMS was determined for the bipolar acquisition. Between-group differences were analyzed with the Kruskal Wallis analysis of variance. Results: Task performance was similar in patients and controls. However, patients displayed greater masseter EMG activity bilaterally at higher force levels (P<.05). Conclusion: This study has provided novel evidence of altered motor control of the jaw in people with neck pain despite the absence of orofacial pain or temporomandibular disorders.German Academic Exchange Service (DAAD

    Effectiveness of Specific Exercise for Deep Cervical Muscles in Nonspecific Neck Pain: A Systematic Review and Meta-Analysis

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    Objective: The purpose of this review, focused on people with nonspecific neck pain (NSNP), was to assess the effectiveness of specific exercises that recruit the deep cervical muscles compared to other types of exercises or interventions and minimal or no treatment. Methods: This systematic review with meta-analysis screened 5 databases (MEDLINE, Embase, CINAHL, Physiotherapy Evidence Database [PEDro], and The Cochrane Library). Randomized controlled trials investigating the effectiveness of this type of exercise on the intensity of pain were included. Data for each included trial were extracted by 2 independent reviewers. The Cochrane Risk of Bias 2.0 tool was adopted to assess the internal validity of the included trials. The overall quality of evidence was layered with the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) system. Results: The review identified a total of 2397 records. Sixteen articles were included in the qualitative synthesis, and 9 studies were included in the meta-analysis. The pooled results found moderate- to very low-quality evidence that deep cervical muscle exercise protocols are not superior to other types of active exercises in reducing the intensity of pain in people with NSNP. Studies not included in the meta-analysis suggest that specific exercises induce better effects that are superior to those of nontreatment with clinically relevant results. Conclusion: Clinicians can share this information with their patients through shared decision making to determine a more tailored approach to adopt. Future studies with high methodological quality are necessary to reach firm conclusions. Impact: There has been no consensus on exercise type and dosage for the management of NSNP. This study shows that exercises are a useful tool and that the effect of an exercise program that recruits deep cervical muscles seems to be comparable to the effect of other types of active exercises on pain intensity reduction

    Alterations in Masticatory Muscle Activation in People with Persistent Neck Pain Despite the Absence of Orofacial Pain or Temporomandibular Disorders

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    To assess whether patients with persistent neck pain display evidence of altered masticatory muscle behavior during a jaw-clenching task, despite the absence of orofacial pain or temporomandibular disorders

    Manual therapy: Exploiting the role of human touch

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    The physiotherapy approach to musculoskeletal pain is currently pointing more towards a hands-off management of patients by education and exercise therapy. However, hands-on techniques still represent a core element of musculoskeletal physiotherapy practice appreciated by patients and widely taught in educational program and clinical professional development training

    Visual Feedback of Bilateral Bite Force to Assess Motor Control of the Mandible in Isometric Condition.

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    The assessment of the individual ability of modulating and coordinating the right and left bite force is poorly investigated. The present study describes a methodology for the assessment of the bilateral control of the biting force and evaluates the test-retest reliability in a sample of 13 healthy subjects. By modulating the intensity and the left/right balance of the biting force, the subject was able to drive a cursor on the screen in order to "reach and hold" targets, randomly generated within the physiological "range of force" of the subject. The average motor performance was evaluated by the Mean cursor-target Distance= 13 ±5%, the Offset Error= 9 ±5%and the Standard Deviation of the force vector = 17.7 ± 6.1% (expressed as % of the target). Mean Distance and Standard Deviation indices had acceptable reliability. This technique improves the characterization of the mandibular motor function and it may have a relevant role for the assessment and rehabilitation of the neuromusculoskeletal disorders affecting the orofacial system

    Raising and stabilization phase of the sit-to-stand movement better discriminate healthy elderly adults from young subjects: a pilot cross-sectional study

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    Abstract Background The sit-to-stand (STS) test is usually included in the clinical assessment of balance and its instrumented analysis may support clinicians in objectively assessing the risk of falling. The aim of the present study was to assess if kinetic parameters of STS collected using a force platform, with particular focus on the raising and stabilization phase, could discriminate between young and older adults. Methods Twenty-four adults (age ranging from 18 to 65 years old) and 28 elderly adults (older than 65 years old) performed STS on a force platform. Data on ground reaction forces, sway, displacement and velocity of the center of pressure were gathered during the raising and the stabilization phases. Results elderly subjects showed significant greater global sway (146.97 vs 119.85; p < 0.05) and a higher velocity (vs 40.03 vs 34.35 mm/s; p < 0.05) of execution of STS. Between-group comparisons highlighted a greater postural sway in the raising phase (21.63 vs 13.58; p < 0.001) and a doubled sway during the stabilization phase (12.38 vs 4.98; p < 0.001). Conclusions The analysis of STS performed on a force platform provides further information about the age-specific pattern of STS execution. The stabilization phase of STS seems to be the more challenging for functional independent older adults and should be considered during balance assessment. Further studies are needed to confirm findings and improve generalizability of this study
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