Influence of recording site within the muscle on motor unit potentials.

Abstract:

:The influence of the recording site on the motor unit potentials (MUPs) was investigated in the brachial biceps muscle of 8 healthy subjects. The MUPs were recorded with a concentric needle electrode and analyzed with a new decomposition EMG program we call multi-MUP analysis. MUPs had shorter durations and smaller amplitudes at superficial recording sites than at deeper sites in the muscle. This is mainly due to the cannula of the concentric electrode, which records a higher potential at superficial recording sites and partially cancels the recorded potentials from the tip in a differential recording. The MUPs had longer durations and higher amplitudes distally than in the middle of the muscle. The longer durations and spike durations are probably due to increased temporal dispersion at a greater distance from the endplate zone. We do not have an adequate explanation for the larger amplitudes distally in the biceps, they may be due to anatomical factors. To increase the diagnostic sensitivity of quantitative MUP analysis the recordings should be obtained from standardized recording sites.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Falck B,Stålberg E,Bischoff C

doi

10.1002/mus.880181207

subject

Has Abstract

pub_date

1995-12-01 00:00:00

pages

1385-9

issue

12

eissn

0148-639X

issn

1097-4598

journal_volume

18

pub_type

杂志文章
  • Relative contributions of neural mechanisms versus muscle mechanics in promoting finger extension deficits following stroke.

    abstract::The origins of impaired finger and hand function were examined in 10 stroke survivors with chronic spastic hemiparesis, with the intent of assessing whether mechanical restraint or altered neurophysiological control mechanisms are responsible for the well-known impairment of finger extension. Simultaneous extension of...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.10443

    authors: Kamper DG,Harvey RL,Suresh S,Rymer WZ

    更新日期:2003-09-01 00:00:00

  • Spinal irradiation does not inhibit distal axonal sprouting.

    abstract::In an attempt to determine the relative importance of the nerve cell body and of the axon in initiating and controlling axonal regeneration, nerve cell bodies were irradiated and the ability of the distal axon to sprout was examined. Mice were subjected to either 25 or 50 Gray (Gy) of x-irradiation localized to the lu...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880110513

    authors: Pamphlett RS

    更新日期:1988-05-01 00:00:00

  • Median and ulnar nerve injuries reduce volitional forelimb strength in rats.

    abstract:INTRODUCTION:Peripheral nerve injuries (PNI) are among the leading causes of physical disability in the United States. The majority of injuries occur in the upper extremities, and functional recovery is often limited. Robust animal models are critical first steps for developing effective therapies to restore function a...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.25590

    authors: Meyers EC,Granja R,Solorzano BR,Romero-Ortega M,Kilgard MP,Rennaker RL 2nd,Hays S

    更新日期:2017-12-01 00:00:00

  • Sensory physiology assessed by evoked potentials in survivors of poliomyelitis.

    abstract::Evidence suggests that sensory loss may occur in a proportion of patients affected by poliomyelitis. We hypothesize that sensory problems may be a lasting sequela in some polio survivors. Sensory pathways in polio survivors were evaluated clinically and electrophysiologically using sensory evoked potentials (SEPs). Pa...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.21093

    authors: Prokhorenko OA,Vasconcelos OM,Lupu VD,Campbell WW,Jabbari B

    更新日期:2008-10-01 00:00:00

  • Genetic variability and clinical spectrum of Chinese patients with limb-girdle muscular dystrophy type 2A.

    abstract:INTRODUCTION:Previous studies of limb-girdle muscular dystrophy type 2A (LGMD2A) patients in many countries have suggested a heterogeneous genetic and clinical spectrum, but the genotypes and phenotypes of Chinese LGMD2A patients remain unclear. METHODS:We directly screened calpain-3 (CAPN3) in 18 Chinese Han subjects...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.23381

    authors: Luo SS,Xi JY,Zhu WH,Zhao CB,Lu JH,Lin J,Wang Y,Lu J,Qiao K

    更新日期:2012-11-01 00:00:00

  • The temperature dependence of halothane-induced contractures of skeletal muscle.

    abstract::Frog muscles bathed in solutions equilibrated with 0.5%-2.0% halothane develop large contractures when cooled to 2-4 degrees C. These halothane-cooling contractures (HCC) are dose dependent and reproducible; they are potentiated by lidocaine (5 mM), abolished by procaine (5 mM), and partially inhibited by procainamide...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880090107

    authors: Suarez-Kurtz G,Sudo RT

    更新日期:1986-01-01 00:00:00

  • GNE myopathy in the bedouin population of Kuwait: Genetics, prevalence, and clinical description.

    abstract:INTRODUCTION:GNE myopathy is a rare recessive myopathy caused by mutations in the GNE gene. It is mainly a distal myopathy with relative sparing of the quadriceps muscle. METHODS:Patients with distal myopathies from Kuwait were examined and tested for the Middle Eastern GNE gene founder mutation, p.M743T. Patients wer...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.26337

    authors: Alrohaif H,Pogoryelova O,Al-Ajmi A,Aljeryan LA,Alrashidi NH,Alefasi SA,Urtizberea A,Lochmüller H,Bastaki L

    更新日期:2018-11-01 00:00:00

  • Differences in both inositol 1,4,5-trisphosphate mass and inositol 1,4,5-trisphosphate receptors between normal and dystrophic skeletal muscle cell lines.

    abstract::Human normal (RCMH) and Duchenne muscular dystrophy (RCDMD) cell lines, as well as newly developed normal and dystrophic murine cell lines, were used for the study of both changes in inositol 1,4,5-trisphosphate (IP3) mass and IP3 binding to receptors. Basal levels of IP3 were increased two- to threefold in dystrophic...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/(sici)1097-4598(199807)21:7<902::aid-mus8>

    authors: Liberona JL,Powell JA,Shenoi S,Petherbridge L,Caviedes R,Jaimovich E

    更新日期:1998-07-01 00:00:00

  • Posterior femoral cutaneous neuralgia.

    abstract::A middle-aged male developed a right posterior femoral cutaneous neuralgia that persisted for 10 years without any associated neurologic, electrophysiologic, or radiologic findings. Five years after onset, surgical exploration of the subgluteal area identified a venous malformation surrounding the nerve. The syndrome ...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880111106

    authors: Chutkow JG

    更新日期:1988-11-01 00:00:00

  • PPARδ preserves a high resistance to fatigue in the mouse medial gastrocnemius after spinal cord transection.

    abstract:INTRODUCTION:Skeletal muscle oxidative capacity decreases and fatigability increases after spinal cord injury. Transcription factor peroxisome proliferator-activated receptor δ (PPARδ) promotes a more oxidative phenotype. METHODS:We asked whether PPARδ overexpression could ameliorate these deficits in the medial gastr...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.24723

    authors: Kim JA,Roy RR,Zhong H,Alaynick WA,Embler E,Jang C,Gomez G,Sonoda T,Evans RM,Edgerton VR

    更新日期:2016-02-01 00:00:00

  • Effect of tumor necrosis factor alpha on electrically induced calcium transients elicited in C2C12 skeletal myotubes.

    abstract::Diseases involving chronic inflammation can lead to prolonged exposure of skeletal muscle to inflammatory cytokines such as tumor necrosis factor alpha (TNFalpha), which may contribute to the skeletal muscle weakness seen in these conditions. In this study we examined the effect of a prolonged exposure to TNFalpha on ...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.20635

    authors: van Kann LN,Bakker AJ

    更新日期:2007-02-01 00:00:00

  • Multiple forms of anti-acetylcholine receptor antibody in myasthenia gravis.

    abstract::Sera of patients with myasthenia gravis (MG) contain anti-acetylcholine receptor (AChR) IgG antibodies (Ab) which have different antigenic specificities. Three Ab types were detected: (1) MG-I, which forms immune complexes with AChR; (2) MG-C, which decreases binding of AChR to concanavalin A; and MG-B, which blocks a...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880040105

    authors: Mittag T,Massa T,Kornfeld P,Papatestas A,Bender A,Genkins G

    更新日期:1981-01-01 00:00:00

  • Calcium paradox in skeletal muscles: physiologic and microscopic observations.

    abstract::Immersion of rat hemidiaphragms in Ca2+-free Krebs solution (KS) containing Ca2+ chelator in vitro leads to separation of basal lamina from the plasma membrane, as well as transient contracture and rapid loss of twitch response [calcium paradox (CP) phase 1]. Subsequent immersion in regular KS results in necrosis of m...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880090306

    authors: Soza M,Karpati G,Carpenter S

    更新日期:1986-03-01 00:00:00

  • Coexistence of two chronic neuropathies in a young child: Charcot-Marie-Tooth disease type 1A and chronic inflammatory demyelinating polyneuropathy.

    abstract::We report an 18-month-old Charcot-Marie-Tooth type 1A (CMT1A) patient who developed a rapid-onset neuropathy, with proximal and distal weakness, and non-uniform nerve conduction studies. The neuropathy responded well to immunomodulation, confirming the coexistence of an inherited and an inflammatory neuropathy. Unexpe...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.21753

    authors: Marques W Jr,Funayama CA,Secchin JB,Lourenço CM,Gouvêa SP,Marques VD,Bastos PG,Barreira AA

    更新日期:2010-10-01 00:00:00

  • Cortical and spinal mechanisms of facilitation to brain stimulation.

    abstract::Compound muscle action potentials (CMAPs) evoked by magnetic brain stimuli are larger if the subject provides a steady background voluntary contraction of the target muscle. This facilitation could be due either to cortical or spinal mechanisms, or both. Both magnetic and electrical stimuli given immediately after the...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/(SICI)1097-4598(199608)19:8<953::AID-MUS3>

    authors: Mills KR,Kimiskidis V

    更新日期:1996-08-01 00:00:00

  • The effects of chronic muscular activity on age-related changes in single fiber electromyography.

    abstract::Single fiber electromyography ( SFEMG ) of the extensor digitorum communis (EDC) muscle and nerve conduction studies were performed on healthy, active elderly men (66-77 years old) to assess age-related changes in neuromuscular physiology and the effect of long-term increased muscular activity on these changes. The fo...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880070403

    authors: Shields RW Jr,Robbins N,Verrilli AA 3rd

    更新日期:1984-05-01 00:00:00

  • Predictors of response to immunomodulation in patients with myasthenia gravis.

    abstract:INTRODUCTION:Factors determining response to intravenous immunoglobulin (IVIg) and plasmapheresis in myasthenia gravis (MG) have not been evaluated systematically. METHODS:This study included patients treated with IVIg (n = 63) or plasmapheresis (n = 42) from two trials evaluating IVIg vs. placebo or plasmapheresis in...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.23236

    authors: Katzberg HD,Barnett C,Bril V

    更新日期:2012-05-01 00:00:00

  • A multicenter, retrospective medical record review of X-linked myotubular myopathy: The recensus study.

    abstract:INTRODUCTION:X-linked myotubular myopathy (XLMTM), characterized by severe hypotonia, weakness, respiratory distress, and early mortality, is rare and natural history studies are few. METHODS:RECENSUS is a multicenter chart review of male XLMTM patients characterizing disease burden and unmet medical needs. Data were ...

    journal_title:Muscle & nerve

    pub_type: 杂志文章,多中心研究

    doi:10.1002/mus.26018

    authors: Beggs AH,Byrne BJ,De Chastonay S,Haselkorn T,Hughes I,James ES,Kuntz NL,Simon J,Swanson LC,Yang ML,Yu ZF,Yum SW,Prasad S

    更新日期:2018-04-01 00:00:00

  • Distal sensory nerve conduction of the superficial peroneal nerve: new method and its clinical application.

    abstract::The superficial peroneal nerve subserves sensation on the entire surface of the dorsum of the foot, except in small areas. All previously reported techniques for evaluating nerve conduction along this nerve tested a proximal portion of the nerve. We report a new method for evaluating sensory nerve conduction of the fo...

    journal_title:Muscle & nerve

    pub_type: 临床试验,杂志文章

    doi:10.1002/mus.1056

    authors: Oh SJ,Demirci M,Dajani B,Melo AC,Claussen GC

    更新日期:2001-05-01 00:00:00

  • Late motor involvement in cases presenting as "chronic sensory demyelinating polyneuropathy".

    abstract::Chronic inflammatory demyelinating polyneuropathy (CIDP) is usually characterized by prominent motor deficits. A pure sensory presentation, labeled chronic sensory demyelinating neuropathy (CSDN), has been reported, but it is unclear if this neuropathy is a distinct clinical and immunologic entity or merely the sensor...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880180411

    authors: Berger AR,Herskovitz S,Kaplan J

    更新日期:1995-04-01 00:00:00

  • Muscle carnitine in hypo- and hyperthyroidism.

    abstract::Weakness is common in both hyper- and hypothyroidism, and skeletal muscle L-carnitine may play a role in this regard, as suggested by studies indicating abnormal levels of carnitine in serum and urine of patients with thyroid dysfunction. Skeletal muscle samples were obtained for carnitine analysis from control subjec...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.20336

    authors: Sinclair C,Gilchrist JM,Hennessey JV,Kandula M

    更新日期:2005-09-01 00:00:00

  • Expression of genes related to myostatin signaling during rat skeletal muscle longitudinal growth.

    abstract::In this study we investigated the gene expression of proteins related to myostatin (MSTN) signaling during skeletal muscle longitudinal growth. To promote muscle growth, Wistar male rats were submitted to a stretching protocol for different durations (12, 24, 48, and 96 hours). Following this protocol, soleus weight a...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.21426

    authors: Aoki MS,Soares AG,Miyabara EH,Baptista IL,Moriscot AS

    更新日期:2009-12-01 00:00:00

  • Bcl-2 and bax immunohistochemistry in denervation-reinnervation and necrosis-regeneration of rat skeletal muscles.

    abstract::Bcl-2 and Bax immunohistochemistry was examined in the skeletal muscle of rats after cutting the sciatic nerve, as a model of denervation and reinnervation, and in the anterior tibialis muscle of rats after an intramuscular injection of metoclopramide, as a model of necrosis and regeneration of muscle fibers, to bette...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/1097-4598(200012)23:12<1862::aid-mus10>3.0

    authors: Olivé M,Ferrer I

    更新日期:2000-12-01 00:00:00

  • Causes of neuromuscular weakness in the intensive care unit: a study of ninety-two patients.

    abstract::The spectrum of neuromuscular disorders among intensive care unit (ICU) patients has shifted toward disorders acquired within the ICU and away from "traditional" neuromuscular disorders that lead to ICU admission. We sought to assess this spectrum by determining the causes and relative frequencies of neuromuscular dis...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/(sici)1097-4598(199805)21:5<610::aid-mus7>

    authors: Lacomis D,Petrella JT,Giuliani MJ

    更新日期:1998-05-01 00:00:00

  • Medial femoral cutaneous nerve conduction study with distal recording: A novel technique.

    abstract:BACKGROUND:A new technique to obtain the sensory nerve action potential (SNAP) of the medial femoral cutaneous nerve is described. METHODS:SNAPs were recorded from 104 subjects with a bar recording electrode 10 cm proximal to the patella along an imaginary line drawn between the medial edge of the patella and the femo...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.26788

    authors: Geney-Castro DE,Vanegas-Muñóz J,Plata-Contreras J,Salinas-Duran F

    更新日期:2020-03-01 00:00:00

  • Evaluation of age, body mass index, and wrist index as risk factors for carpal tunnel syndrome severity.

    abstract::To determine the role of personal variables as risk factors for carpal tunnel syndrome (CTS) and their relationship to severity of nerve conduction abnormality, we studied 210 consecutive symptomatic CTS patients and 320 controls subjects without CTS symptomatology or known systemic disorders. The CTS group was classi...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.10007

    authors: Kouyoumdjian JA,Zanetta DM,Morita MP

    更新日期:2002-01-01 00:00:00

  • Soleus-specific myopathy induced by passive stretching under local tetanus.

    abstract::Twenty-four adult albino rats were injected with tetanus toxin into the right gastrocnemius muscle and then subjected to sustained dorsiflexion of the right ankle joint for 2 to 14 days. Histologic examinations of the soleus after this procedure showed myopathic changes, characterized by variations in fiber diameters,...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880131007

    authors: Mizuno Y,Chou SM

    更新日期:1990-10-01 00:00:00

  • Anatomic variation of the innervation of the flexor digitorum profundus muscle and its clinical implications.

    abstract::In anterior interosseous nerve syndrome and ulnar neuropathy, paralysis or weakness of the flexor digitorum profundus (FDP) muscles has been shown to vary according to the degree of involvement of the median and ulnar nerves, respectively. We traced these nerves in 50 cadaveric specimens in which each FDP was complete...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.21281

    authors: Oh CS,Won HS,Lee KS,Chung IH,Kim SM

    更新日期:2009-04-01 00:00:00

  • Needle electromyography of the frontalis muscle in patients with amyotrophic lateral sclerosis.

    abstract:INTRODUCTION:We sought to determine which muscles to choose for better assessment of the craniobulbar region in establishing the diagnosis of amyotrophic lateral sclerosis (ALS). METHODS:We studied the frontalis muscle in 83 controls and compared it with the tongue, sternocleidomastoid (SCM), and trapezius muscles in ...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.25236

    authors: Pan H,Jian F,Lin J,Chen N,Zhang Z,Wang Y,Cui L,Kimura J

    更新日期:2016-12-01 00:00:00

  • Modeling fiber type grouping by a binary Markov random field.

    abstract::A new approach to the quantification of fiber type grouping is presented, in which the distribution of histochemical type in a muscle cross section is regarded as a realization of a binary Markov random field (BMRF). Methods for the estimation of the parameters of this model are discussed. The first order BMRF, which ...

    journal_title:Muscle & nerve

    pub_type: 杂志文章

    doi:10.1002/mus.880150617

    authors: Venema HW

    更新日期:1992-06-01 00:00:00