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Facial electromyography: responses of children to odor and taste stimuli

Jessica E Armstrong1, Ian Hutchinson, David G Laing

  • 1Centre for Plant and Food Sciences, University of Western Sydney, Locked Bag 1797, Penrith South, New South Wales 1797, Australia.

Chemical Senses
|May 19, 2007
PubMed

Insights

Facial electromyography (EMG) effectively measured children's responses to smells and tastes, showing similar hedonic perception to adults. This suggests EMG could objectively assess infant sensory function.

Area of Science:

  • Neuroscience
  • Sensory Science
  • Clinical Psychology

Background:

  • Assessing sensory perception in children, especially infants, presents challenges.
  • Facial expressions are key indicators of hedonic responses to taste and smell.
  • Facial electromyography (EMG) offers a potential objective measurement tool.

Purpose of the Study:

  • To investigate the utility of facial EMG for measuring children's responses to pleasant and unpleasant olfactory and gustatory stimuli.
  • To determine if EMG activity in specific facial muscles correlates with hedonic perception in children.
  • To explore the potential of EMG as a clinical assessment tool for sensory function in young children and infants.

Main Methods:

  • Recorded EMG activity from the zygomaticus major and levator labii muscles in 34 children (aged 6-9 years).
  • Presented children with 4 odorants and 4 tastants, both pleasant and unpleasant.
  • Analyzed EMG data to identify differential muscle responses to varying stimuli.

Main Results:

  • EMG activity in the zygomaticus major and levator labii muscles successfully differentiated between pleasant and unpleasant smell and taste stimuli.
  • Children's EMG responses mirrored adult hedonic perception patterns.
  • High inter-subject agreement was observed in the differential muscle activity patterns.

Conclusions:

  • Facial EMG provides an objective measure of hedonic responses to taste and smell in children.
  • Findings support the use of facial EMG for clinical assessment of sensory function in infants and newborns.
  • This objective method could overcome limitations of behavioral observation in very young populations.

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