Periodontal anaesthetisation decreases rhythmic synchrony between masseteric motor units at the frequency of jaw tremor

Sowman P. F., Ogston K. M., Türker K. S.

Experimental Brain Research, cilt.179, sa.4, ss.673-682, 2007 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 179 Sayı: 4
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1007/s00221-006-0824-9
  • Dergi Adı: Experimental Brain Research
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.673-682
  • Anahtar Kelimeler: physiological tremor, motor unit, trigeminal, coherence
  • İstanbul Gelişim Üniversitesi Adresli: Hayır

Özet

This study links the reduction in jaw physiological tremor around 8 Hz following periodontal mechanoreceptor (PMR) anaesthetisation to changes in coherence between masseteric motor unit discharges. We have recorded single motor unit activity from two separate sites in the right masseter muscle during a low level tonic contraction, both prior to and during anaesthetisation of the peri-incisal PMRs. Anaesthetisation of PMRs decreased coherent activity between motor units circa 8 Hz, and decreased synchrony between the same motor unit pairs. It is proposed that tremor-generating inputs that cause rhythmic synchronisation of masseteric motor units arise from, or are amplified by the PMRs. © 2006 Springer-Verlag.