title: Motor unit potentials of the erector spinae muscle by concentric needle electromyography.
abstract: The needle electromyography (EMG) serves to supply additional information in patients with suspected neuromuscular disorders. We aimed to provide motor unit potential (MUP) data by concentric needle EMG in the erector spinae (ES) in comparison with biceps brachii (BB) and lateral vastus (LV).
  
  
  
  Electromyography MUP data (n) were obtained in ES (517), BB (539), and LV (627) in 32 healthy volunteers (16f).
  
  
  
  Motor unit potential data: amplitude (μV) 393 ± 174 (ES), 375 ± 162 (BB), and 577 ± 304 (LV); duration (ms) 10.4 ± 2.4 (ES), 10.1 ± 2.1 (BB), and 11.1 ± 2.3 (LV), area (μV × ms) 585 ± 327 (ES), 538 ± 267 (BB), and 881 ± 492 (LV); phase number 3.23 ± 0.94 (ES), 2.98 ± 0.76 (BB), and 3.19 ± 0.81 (LV); size index 0.60 ± 0.56 (ES), 0.51 ± 0.53 (BB), and 0.96 ± 0.55 (LV). LV displayed higher values (pat least <.001) for MUP amplitude, duration, area, and size index as compared to both, BB and ES.
  
  
  
  Concentric needle EMG investigations in healthy adult human subjects revealed similar MUP parameters in the ES and BB muscles, while in the LV muscle MUP amplitude, duration, area, and size index were significantly larger. Different neuromuscular disorders display a predominant involvement of proximally located muscles such as truncal muscles. The present results given here may facilitate the diagnosis of neuromuscular disorders.
authors.affiliation: Department of Neurology Martin-Luther-University Halle-Wittenberg Halle (Saale) Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Posa
authors.affiliation: Department of Neurology Martin-Luther-University Halle-Wittenberg Halle (Saale) Germany.
authors.forename: Izabela
authors.initials: I
authors.lastname: Niśkiewicz
authors.affiliation: Department of Neurology Martin-Luther-University Halle-Wittenberg Halle (Saale) Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Emmer
authors.affiliation: Department of Neurology Martin-Luther-University Halle-Wittenberg Halle (Saale) Germany.
authors.forename: Yorck
authors.initials: Y
authors.lastname: Kluge
authors.affiliation: Department of Neurology Martin-Luther-University Halle-Wittenberg Halle (Saale) Germany.
authors.forename: Malte E
authors.initials: ME
authors.lastname: Kornhuber
mesh_terms: D000328:Adult; D004576:Electromyography / Q000295:instrumentation / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D009339:Needles; D064170:Paraspinal Muscles / Q000502:physiology*; D011999:Recruitment, Neurophysiological / Q000502:physiology*; D055815:Young Adult
keywords: biceps brachii muscle; concentric needle electromyography; erector spinae muscle; motor unit potential; vastus lateralis muscle