Abstract:
:Electromyographic (EMG) recordings may serve an important role in predicting torque during repetitive activation of paralyzed muscle. We compared the initial M-wave to the subsequent M-waves of the same train under fatigued and recovered conditions in the paralyzed human soleus muscle. Sixteen individuals with chronic (n = 13) or acute paralysis (n = 3) had the tibial nerve activated before and after a repetitive supramaximal stimulation protocol. The mean within-train M-wave amplitude and median frequency increased approximately 20%, whereas the duration decreased approximately 15% compared with the initial M-wave of each train. During fatigue, there was a linear decrease in the difference between the initial M-wave amplitude and subsequent train ( approximately 20% to 8%). Following fatigue, this difference recovered to approximately 12%. The difference between the M-wave train average and the initial M-wave for amplitude, duration, and median frequency closely followed torque (Pearson correlations = 0.99, 0.94, and 0.98, respectively) during fatigue. We conclude that the difference between the later-occurring M-waves (average of the train) and initial M-wave is large when muscle torque is high and less when torque is low and, therefore, predicts torque during activation of paralyzed muscle. This difference in the within-train M-wave amplitude, duration, and median frequency may reflect a mechanical change, such as muscle shortening and increased muscle cross-sectional area during isometric contractions. Electromyographic feedback may assist in the optimization of neuromuscular electrical stimulation of paralyzed muscle.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Chang YJ,Shields RKdoi
10.1002/mus.10245subject
Has Abstractpub_date
2002-11-01 00:00:00pages
673-80issue
5eissn
0148-639Xissn
1097-4598journal_volume
26pub_type
杂志文章相关文献
MUSCLE & NERVE文献大全abstract::Skeletal muscle cells are hypertrophied by mechanical stresses, but the underlying molecular mechanisms are not fully understood. Two signaling pathways, phosphatidylinositol 3-kinase (PI3K)/Akt to target of rapamycin (TOR) and extracellular signal-regulated kinase kinase (MEK) to extracellular signal-regulated kinase...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.21473
更新日期:2010-01-01 00:00:00
abstract:INTRODUCTION:While current exercise guidelines recommend progressive, high-intensity resistance training (RT) to promote muscle hypertrophy and strength gains, controversy exists regarding the efficacy of lighter-load RT. We compared 2 work-matched RT interventions that differed in training intensity. METHODS:Fifteen ...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.24271
更新日期:2015-01-01 00:00:00
abstract::Congenital myasthenic syndromes (CMS) stem from defects in presynaptic, synaptic basal lamina, and postsynaptic proteins. The presynaptic CMS are associated with defects that curtail the evoked release of acetylcholine (ACh) quanta or ACh resynthesis. Defects in ACh resynthesis have now been traced to mutations in cho...
journal_title:Muscle & nerve
pub_type: 杂志文章,评审
doi:10.1002/mus.10269
更新日期:2003-01-01 00:00:00
abstract:INTRODUCTION:Contradictory reports of the myosin heavy chain (MHC) composition of adult human suprahyoid muscles leave unresolved the extent to which these muscles express developmental and unconventional MHC. METHODS:By immunohistochemistry, separation sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PA...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.23946
更新日期:2014-04-01 00:00:00
abstract:INTRODUCTION:Psoriasis is a T-cell-mediated skin disorder with uncommon extracutaneous manifestations. Rare patients with psoriasis and myopathy have been reported. METHODS:We conducted a retrospective review of medical records of psoriasis patients seen at the Mayo Clinic during the period from January 1, 1996 to May...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.23812
更新日期:2013-11-01 00:00:00
abstract::Thyrotropin-releasing hormone (TRH), present in high concentrations in the mammalian spinal cord, exerts excitatory effects on the alpha-motorneuron (AMN) via axodendritic contacts. We used the neurotoxin 5,7-dihydroxytryptamine (5,7-DHT) to deplete TRH from the ventral horn of the spinal cord of adult rats to determi...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.880100504
更新日期:1987-06-01 00:00:00
abstract::Modern neuromuscular electrodiagnosis (EDX) and neuromuscular ultrasound (NMUS) require a universal language for effective communication in clinical practice and research and, in particular, for teaching young colleagues. Therefore, the AANEM and the IFCN have decided to publish a joint glossary as they feel the need ...
journal_title:Muscle & nerve
pub_type: 杂志文章,评审
doi:10.1002/mus.26868
更新日期:2020-07-01 00:00:00
abstract::An enzyme- and immunohistochemical study has been performed on human masseter muscle spindles. Antibodies selective for different myosin heavy chain (MHC) isoforms and M-band proteins (M-protein, myomesin, and MM-CK) were used. The expression of these proteins was determined in the different intrafusal fiber types. Nu...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.880170105
更新日期:1994-01-01 00:00:00
abstract::L1 radiculopathy is very rare and difficult to diagnose with needle electromyography. A patient presented with pain and hypesthesia on the anterolateral aspect of the left thigh. Nerve conduction studies and needle electromyography were normal, except for the quadratus lumborum and iliopsoas muscles, which showed abno...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.21601
更新日期:2010-04-01 00:00:00
abstract::Bariatric surgical procedures are increasingly common. In this review, we characterize the neurologic complications of such procedures, including their mechanisms, frequency, and prognosis. Literature review yielded 50 case reports of 96 patients with neurologic symptoms after bariatric procedures. The most common pre...
journal_title:Muscle & nerve
pub_type: 杂志文章,评审
doi:10.1002/mus.20394
更新日期:2006-02-01 00:00:00
abstract::Three well-characterized antimyosin heavy chain monoclonal antibodies (McAbs) were used as immunocytochemical reagents to study myosin isoform expression in relationship to adenosine triphosphatase (ATPase) defined fiber types in human muscle. The biopsy specimens were from patients with neurogenic muscle disease whos...
journal_title:Muscle & nerve
pub_type: 杂志文章,评审
doi:10.1002/mus.880120809
更新日期:1989-08-01 00:00:00
abstract:INTRODUCTION:Many prognostic factors have been studied in carpal tunnel decompression, but most studies consider only a subset of variables. METHODS:Three thousand three hundred thirty-two operations were used to develop prognostic models, and 885 operations were used for validation. Outcome recorded on a Likert scale...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.26297
更新日期:2018-12-01 00:00:00
abstract::A mathematical model is presented that predicts the electric field induced in the arm during magnetic stimulation of a peripheral nerve. The arm is represented as a homogeneous, cylindrical volume conductor. The electric field arises from two sources: the time-varying magnetic field and the accumulation of charge on t...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.880130812
更新日期:1990-08-01 00:00:00
abstract::Exercise intolerance with myalgia, muscle stiffness, and recurrent rhabdomyolysis due to mutations in the DMD gene can mimic metabolic myopathies leading to delayed or inaccurate diagnoses. In this retrospective chart review, we report 3 unrelated boys with exertional myalgia, muscle stiffness, myoglobinuria, and norm...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.21823
更新日期:2010-12-01 00:00:00
abstract::Voluntary and stimulation single-fiber electromyography were performed in the extensor digitorum communis muscle of 15 myasthenic patients. The increase in mean and individual mean consecutive difference as well as the proportion of blocking in the volitional activation were greater than in the stimulation method. The...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/(sici)1097-4598(199808)21:8<1081::aid-mus1
更新日期:1998-08-01 00:00:00
abstract::Impaired torque production is a major physical impairment following stroke, and has been studied extensively in isometric conditions. However, functional use of a limb requires torque production during movement, and the effects of velocity on maximal torque production may be abnormally enhanced in the paretic limb. Th...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.20157
更新日期:2004-12-01 00:00:00
abstract:INTRODUCTION:Nebulin is a giant actin-binding protein in the thin filament of the skeletal muscle sarcomere. Studies of nebulin interactions are limited by the size, complexity, and poor solubility of the protein. We divided the nebulin super-repeat region into a super-repeat panel, and studied nebulin/actin interactio...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.26350
更新日期:2019-01-01 00:00:00
abstract:INTRODUCTION:Although there are numerous protocols to adjust the amplitude of the Hoffmann reflex (H-reflex) relative to the size of the direct motor response (M-response), the optimal stimulating location has not been described. We sought to determine the optimal positioning of the stimulating cathode when evoking the...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.26308
更新日期:2018-12-01 00:00:00
abstract::To determine if short TI (time to inversion) recovery (STIR) magnetic resonance imaging (MRI) is useful in assessing lower extremity (LE) denervation in subacute lumbar radiculopathy (LR), 25 subjects underwent lumbar spine MRI, LE STIR MRI and needle electromyography (EMG). In 23 (92%) subjects there was a positive c...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/(sici)1097-4598(199709)20:9<1191::aid-mus1
更新日期:1997-09-01 00:00:00
abstract::Single muscle fibers were prepared from biopsy specimens of Duchenne muscular dystrophy (DMD), normal, and neuromuscular disease controls. Single muscle cells were classified as type 1, type 2, or intermediate by the skinned fiber method. The intermediate fiber was most abundant in DMD, comprising 29% of fibers examin...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.880050511
更新日期:1982-05-01 00:00:00
abstract::The term thoracic outlet syndrome (TOS) refers to a heterogeneous group of disorders, all of which have in common compression of one or more neurovascular elements at some point within the thoracic outlet. Of the five disorders comprising this group, four have all of the features expected of a syndrome-a recognized co...
journal_title:Muscle & nerve
pub_type: 杂志文章,评审
doi:10.1002/mus.23235
更新日期:2012-06-01 00:00:00
abstract::To determine the contributions of neural and mechanical mechanisms to the limits in the range of motion (ROM) about a joint, we studied the effects of 30 sessions of static stretch training on the characteristics of the plantar-flexor muscles in 12 subjects. Changes in the maximal ankle dorsiflexion and the torque pro...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.10549
更新日期:2004-02-01 00:00:00
abstract::Daptomycin is a lipopeptide antibiotic with strong bactericidal effects against Gram-positive bacteria and minor side effects on skeletal muscles. The type and magnitude of the early effect of daptomycin on skeletal muscles of rats was quantified by histopathology, examination of contractile properties, Evans Blue Dye...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.21691
更新日期:2010-09-01 00:00:00
abstract::A 66-year-old professional golf instructor developed pain, numbness, and weakness in an ulnar distribution, but the lesion could not be localized to either elbow or wrist by routine nerve conduction techniques. Stimulation along serial 1-cm increments in the distal forearm disclosed a point of focal conduction block a...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.880120502
更新日期:1989-05-01 00:00:00
abstract::We report a patient who experienced progressive diplopia and distal weakness of the upper limbs. Magnetic resonance imaging of the brain showed extensive white matter lesions and analysis of cerebrospinal fluid revealed acute human T-lymphotropic virus type I (HTLV-I) infection. Myasthenia gravis (MG) was evidenced by...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.20694
更新日期:2007-04-01 00:00:00
abstract::Peripheral nerve disorders are commonly encountered in clinical practice. Electrodiagnostic studies remain the cornerstone of the evaluation of nerve disorders. More recently, ultrasound has played an increasing complementary role in the neuromuscular clinic. Ultrasound elastography is a technique that measures the el...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.26624
更新日期:2019-11-01 00:00:00
abstract::Loss of cells from the motor system occurs during the normal aging process, leading to reduction in the complement of motor neurons and muscle fibers. The latter age-related decrease in muscle mass has been termed "sarcopenia" and is often combined with the detrimental effects of a sedentary lifestyle in older adults,...
journal_title:Muscle & nerve
pub_type: 杂志文章,评审
doi:10.1002/mus.1215
更新日期:2002-01-01 00:00:00
abstract:INTRODUCTION:Bifacial weakness with paresthesias is a rare subtype of Guillain-Barré syndrome (GBS), characterized by facial diplegia in the absence of any other cranial neuropathies, limb weakness, or ataxia. Frequently, patients also complain of distal limb paresthesias before or at the time they develop facial weakn...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.25028
更新日期:2016-05-01 00:00:00
abstract::Neuromyotonia or Isaacs' syndrome is a rare peripheral nerve hyperexcitability disorder caused by antibodies against potassium channels of myelinated axons. We present the high-density surface electromyographic (EMG) recordings of a patient with fasciculations and cramps due to neuromyotonia. To characterize the time ...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.20849
更新日期:2008-02-01 00:00:00
abstract:INTRODUCTION:Statins have well-known benefits on cardiovascular mortality, though up to 15% of patients experience side effects. With guidelines from the American Heart Association, American College of Cardiology, and American Diabetes Association expected to double the number of statin users, the overall incidence of ...
journal_title:Muscle & nerve
pub_type: 杂志文章
doi:10.1002/mus.24722
更新日期:2016-02-01 00:00:00