Double discharges in human soleus muscle


Piotrkiewicz M., Sebik O., Binboğa E., Młoźniak D., Kuraszkiewicz B., Türker K. S.

Frontiers in Human Neuroscience, cilt.7, 2013 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 7
  • Basım Tarihi: 2013
  • Doi Numarası: 10.3389/fnhum.2013.00843
  • Dergi Adı: Frontiers in Human Neuroscience
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: soleus, double discharges, firing patterns, human motoneuron, delayed depolarization
  • İstanbul Gelişim Üniversitesi Adresli: Hayır

Özet

Double discharges (doublets) were recorded from human soleus (SOL), where they have never been reported before. The data analyzed in this study were collected from 12 healthy volunteers. The subjects were recruited for other studies, concerning: (1) estimation of motoneurons’ (MNs) afterhyperpolarization (AHP) duration and (2) analysis of motor unit responses to nerve stimulation, and were not trained to voluntarily evoke doublets. The majority of intradoublet intervals fell into the commonly accepted range 2-20 ms. However, two SOL MNs from one presented exceptional doublets of intradoublet interval about 37 ms. This interval was virtually identical with the interval between second and third discharge in the few triplets recorded from another subject. It is hypothesized that triplets are generated by the delayed depolarization with the second narrow hump, which is the same as the hump responsible for exceptional doublets.