Abstract：
OBJECTIVE:To demonstrate the errors in surface electromyogram (EMG) interpretation that can be made when the EMG signal is not normalized. DESIGN:A case study as a proof of principle. MAIN OUTCOME MEASURES:The EMG amplitude between the upper and lower portions of the rectus abdominis in one subject during a trunk curl when the EMG signal was normalized (expressed as a percentage of a maximum voluntary contraction) and the amplitude when the signal was expressed in raw, unnormalized arbitrary units or raw millivolts directly read from the instrumentation. RESULTS:Interpretation of the unnormalized EMG signal suggests that a large difference in neural activation of the upper and lower sections of the rectus abdominis is occurring. In this condition the average activity in the lower rectus is 60.9% of that in the upper portion. This interpretation is incorrect. When the EMG signal is normalized, the differences between the upper and lower segments are reduced. When normalized, the lower segment activity is equal to that of the upper segment. CONCLUSIONS:Because of the inherent EMG signal variability, clinical interpretation of surface EMG signals requires normalization of the signal for physiologic interpretation and for comparison between bilateral muscles and between the same muscle on different days and between different subjects.
journal_name
J Manipulative Physiol Therjournal_title
Journal of manipulative and physiological therapeuticsauthors
Lehman GJ,McGill SMdoi
10.1016/s0161-4754(99)70032-1subject
Has Abstractpub_date
1999-09-01 00:00:00pages
444-6issue
7eissn
0161-4754issn
1532-6586pii
S0161-4754(99)70032-1journal_volume
22pub_type
杂志文章,评审abstract：OBJECTIVES:The purpose of this study was to compare the effectiveness of cryotherapy with mobilization (CM) vs cryotherapy with mobilization reinforced with home stretching exercises (CMS) on pain and disability. METHOD:A randomized clinical trial with 2-arm parallel design, concealed allocation, assessor blinding, an...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2018.11.030
更新日期：2020-01-01 00:00:00
abstract：OBJECTIVE:Few studies have addressed the practice of chiropractic care of children in Europe. No systematic classification of conditions currently exists in chiropractic pediatrics. The objective of this study was to investigate characteristics of clinical chiropractic practice, including the age of pediatric patients,...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2012.04.008
更新日期：2012-06-01 00:00:00
abstract：OBJECTIVE:The purposes of this study were to (1) evaluate the reliability and reproducibility of chest expansion (CE) measurement on 2 different levels and (2) observe relationships between upper and lower CE measurements and lung function. METHODS:Fifty-three healthy subjects aged between 18 and 39 years were recruit...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2016.05.004
更新日期：2016-07-01 00:00:00
abstract：:Controversy persists regarding the significance of leg length inequality, the diagnostic approach to the use of heel lifts, and the implementation of proper orthopedic support in treatment of anatomical leg length inequalities. The purpose of this paper is to review the literature and formulate a sequential examinatio...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章,评审
doi：
更新日期：1988-08-01 00:00:00
abstract：OBJECTIVE:This study evaluates age- and sex-specific reference values for neck muscle endurance (NME). METHODS:In this cross-sectional study, 116 randomly selected, healthy volunteers (ages 25-64 years) stratified according to age and gender participated. Dorsal and ventral NME was measured in seconds until exhaustion...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2007.01.008
更新日期：2007-03-01 00:00:00
abstract：BACKGROUND:Motor evoked potentials (MEPs) obtained from magnetic stimulation allow the measurement of the excitability of motor nerve cells. Although this technique is becoming widely used, its reliability has yet to be established. OBJECTIVE:To determine the reliability of MEPs and evaluate their stability. DESIGN:S...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2003.12.004
更新日期：2004-02-01 00:00:00
abstract：OBJECTIVES:This study aimed to describe patients' perspectives on their experience in osteopathic treatment, to contribute toward developing interpretative models on effectiveness. METHODS:A descriptive phenomenological approach was used. The data were collected through a semistructured interview. To capture the varia...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2020.02.003
更新日期：2020-01-01 00:00:00
abstract：OBJECTIVE:Good communication between health care professionals has proved to be important in ensuring high standards of care. Patients have shown an increased use of complementary medicine (eg, chiropractic) in addition to conventional medicine. However, this does not automatically guarantee good cooperation and commun...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1067/mmt.2001.112016
更新日期：2001-01-01 00:00:00
abstract：OBJECTIVE:The objective of this study was to research the distribution of stresses and displacements in cervical nuclei pulposi during simulated cervical spine manipulation (CSM). METHODS:A 3-dimensional finite element model of C3/4~C6/7 was established. The detailed mechanical parameters of CSM were analyzed and simu...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2014.05.007
更新日期：2014-10-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to compare characteristics, likelihood to use, and actual use of chiropractic care for US survey respondents with positive and negative perceptions of doctors of chiropractic (DCs) and chiropractic care. METHODS:From a 2015 nationally representative survey of 5422 adults (respon...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2016.02.001
更新日期：2016-03-01 00:00:00
abstract：OBJECTIVE:Back pain has consistently ranked among the top general health complaints among college students, but few studies have examined risk factors for back pain in this age group. This cross-sectional survey evaluated the association between the self-reported annual low back pain with the estimated usual backpack w...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2010.06.003
更新日期：2010-07-01 00:00:00
abstract：OBJECTIVE:To investigate the primary care, health promotion activities associated with what has historically been called "maintenance care" (MC) as used in the practice of chiropractic in the United States. This includes issues such as investigating the purpose of MC, what conditions and patient populations it best ser...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/s0161-4754(00)90107-6
更新日期：2000-01-01 00:00:00
abstract：OBJECTIVE:This study compared the effects of high-force versus low-force lumbar traction in the treatment of acute lumbar sciatica secondary to disc herniation. METHODS:A randomized double blind trial was performed, and 17 subjects with acute lumbar sciatica secondary to disc herniation were assigned to high-force tra...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jmpt.2016.09.006
更新日期：2016-01-01 00:00:00
abstract：INTRODUCTION:The purpose of this systematic review was to examine literature on workplace factors associated with neck pain or symptoms in computer users performing clerical functions. METHODS:A systematic search of the Cochrane, Medline, CINAHL, and EMBASE databases was conducted for observational and experimental st...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2018.01.005
更新日期：2018-01-01 00:00:00
abstract：OBJECTIVE:When designing prediction models by complete case analysis (CCA), missing information in either baseline (predictors) or outcomes may lead to biased results. Multiple imputation (MI) has been shown to be suitable for obtaining unbiased results. This study provides researchers with an empirical illustration of...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2012.07.002
更新日期：2012-07-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to systematically review the literature evaluating the reliability and validity of all available methods for measuring active and passive cervical range of motion (CROM). METHODS:Electronic databases (PubMed, MEDLINE, CINAHL, EMBASE, and AMED) were searched through OVID from the...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章,评审
doi：10.1016/j.jmpt.2009.12.009
更新日期：2010-02-01 00:00:00
abstract：:Many patients with low back pain demonstrate pelvic symptomatology attributable to lower sacral nerve root compression. Lower sacral nerve root compression has been identified as a cause of pelvic pain and pelvic organ dysfunction. Pelvic symptomatology secondary to lower sacral nerve root compression is given. Lower ...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：
更新日期：1987-06-01 00:00:00
abstract：:The Euler buckling theory has been presented as evidence that spinal curves increase the spine's axial load carrying capacity. The Euler theory is however, derived for an initially straight beam or column and as such cannot be applied to initially curved structures, such as the human spine. ...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：
更新日期：1983-06-01 00:00:00
abstract：OBJECTIVE:Finite helical axis parameters (FHAP) of the cervical spine and clinical measures were obtained to evaluate neck function and the clinical effects of spinal manipulative therapy in patients with "whiplash" (WL) type neck injury. DESIGN:Descriptive case series, 1 yr follow-up. SETTING:Three private chiroprac...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：
更新日期：1992-10-01 00:00:00
abstract：OBJECTIVE:To discuss the case of a 45-year-old woman, with a prior diagnosis of neurofibromatosis type 1 (NF-1), complaining of low back and cervical spine pain with bilateral upper extremity paresthesias. CLINICAL FEATURES:The patient had a dull, achy, constant low-back pain of 4 months' duration, with mild headaches...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1067/mmt.2003.7
更新日期：2003-02-01 00:00:00
abstract：:In this study, 58 subjects with myofascial low back pain and 26 asymptomatic controls were evaluated according to a protocol of biomechanical analysis involving the plumbline, lateral bending dynamic roentgenograms, sacro-iliac motion palpation, lumbar motion palpation and straight-leg-raising. The outcomes of each te...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：
更新日期：1982-12-01 00:00:00
abstract：BACKGROUND:Alterations in the normal force-displacement (FD) properties of spinal tissues have been associated with specific forms of pathology, such as degenerative disk disease. Unfortunately, few current procedures exist that assess spinal FD properties in an accurate, reliable, and noninvasive manner. Consequently,...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：
更新日期：2001-03-01 00:00:00
abstract：OBJECTIVE:This study describes the opinions and behaviors of chiropractic patients in a large, western Canadian urban center regarding the sale of health products by doctors of chiropractic. METHODS:A brief, descriptive survey consisting of both fixed-choice and open-ended questions was distributed by clinic reception...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2014.10.015
更新日期：2015-01-01 00:00:00
abstract：:The role and position of chiropractic care in the health care system must be transformed from being alternative and separate to alternative and mainstream. This transformation requires that chiropractic services become integrated in the many health care delivery organizations that collectively constitute the health ca...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章,评审
doi：10.1016/s0161-4754(00)90080-0
更新日期：2000-02-01 00:00:00
abstract：:The paper describes the history, symptoms and clinical findings of a typical spinal segmental strain with joint blocking. Also provided are an overview and discussion of joint blocking theories. A mechanism is hypothesized whereby joint blocking may be viewed as an actively maintained, reversible, biomechanical phenom...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：
更新日期：1985-03-01 00:00:00
abstract：OBJECTIVE:There has been much discussion about the role of chiropractic care in the evaluation, management, and treatment of pediatric patients. To date, no specific guidelines have been adopted that address this issue from an evidence based perspective. Previous systematic reviews of the chiropractic literature conclu...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2009.08.018
更新日期：2009-10-01 00:00:00
abstract：STUDY DESIGN:Best evidence synthesis. OBJECTIVE:To report on gaps in the literature and make methodologic recommendations based on our review of the literature on frequency and risk factors, assessment, intervention, and course and prognostic factors for neck pain and its associated disorders. SUMMARY OF BACKGROUND D...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2008.11.024
更新日期：2009-02-01 00:00:00
abstract：OBJECTIVES:The purpose of this study was to characterize the force-time profile of the McTimoney toggle-torque-recoil (MTTR) technique. METHODS:Two licensed chiropractors trained in the McTimoney Method applied MTTR thrusts to a tabletop where a dynamic load cell had been mounted. Each clinician applied 10 thrusts (5 ...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2009.04.005
更新日期：2009-06-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to test the feasibility of collecting valid and widely used health outcomes, including information concerning cost of care, using a Web-based patient-driven patient-reported outcome measure (PROM) collection process within a cohort of UK chiropractic practices. METHODS:A Web-bas...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章,多中心研究
doi：10.1016/j.jmpt.2015.12.001
更新日期：2016-01-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to test an educational intervention designed to increase hand and treatment table sanitizing on 3 chiropractic college campuses using a theory-based intervention. The second purpose is to see if an increase in observed hand hygiene would be noted as a result of the intervention. ...
journal_title：Journal of manipulative and physiological therapeutics
pub_type： 杂志文章
doi：10.1016/j.jmpt.2009.06.007
更新日期：2009-07-01 00:00:00
