PMID- 1577115
OWN - NLM
STAT- MEDLINE
DCOM- 19920608
LR  - 20190721
IS  - 0014-4819 (Print)
IS  - 0014-4819 (Linking)
VI  - 88
IP  - 2
DP  - 1992
TI  - Task dependence of human masseter motor unit reflex behaviour.
PG  - 443-6
AB  - Motor unit (MU) firing frequency is an important determinant of reflex inhibition 
      in the human jaw muscles. Masseter MUs may be driven steadily by various 
      intraoral tasks, but their lowest sustainable firing frequency varies according 
      to task. In this study we examined the effect of task on masseter MU reflex 
      behaviour under controlled conditions, in which the prestimulus MU firing 
      frequency and stimulation were constrained. All MUs tested were inhibited by a 
      non-noxious electrical stimulus applied to the oral mucosa, but there were 
      significant differences in the magnitude of single MU inhibition depending on the 
      task employed to drive the MUs. It appears that single masseter MU reflex 
      behaviour can alter according to task, even when the prestimulus excitation of 
      the masseter motoneuron pool is apparently constant. This suggests that masseter 
      MU reflex behaviour may be modulated by task-related peripheral afferent input.
FAU - McMillan, A S
AU  - McMillan AS
AD  - Department of Clinical Dental Sciences, Faculty of Dentistry, University of 
      British Columbia, Vancouver, Canada.
FAU - Hannam, A G
AU  - Hannam AG
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Germany
TA  - Exp Brain Res
JT  - Experimental brain research
JID - 0043312
SB  - IM
MH  - Adult
MH  - Electric Stimulation
MH  - Electrophysiology
MH  - Female
MH  - Humans
MH  - Jaw
MH  - Male
MH  - Masticatory Muscles/cytology/*physiology
MH  - Motor Neurons/physiology
MH  - Mouth Mucosa/physiology
MH  - Reflex/*physiology
EDAT- 1992/01/01 00:00
MHDA- 1992/01/01 00:01
CRDT- 1992/01/01 00:00
PHST- 1992/01/01 00:00 [pubmed]
PHST- 1992/01/01 00:01 [medline]
PHST- 1992/01/01 00:00 [entrez]
AID - 10.1007/BF02259119 [doi]
PST - ppublish
SO  - Exp Brain Res. 1992;88(2):443-6. doi: 10.1007/BF02259119.