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The effect of mastication on human cognitive processing: a study using event-related potentials.

Kiwako Sakamoto1, Hiroki Nakata, Ryusuke Kakigi

  • 1Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki 444-8585, Japan. kiwakos@nips.ac.jp

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Chewing gum, or mastication, speeds up cognitive processing and reaction times. This study is the first to show mastication

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Area of Science:

  • Cognitive Neuroscience
  • Psychophysiology

Background:

  • Cognitive processing speed is crucial for daily functioning.
  • The impact of mastication on cognitive functions remains underexplored.

Purpose of the Study:

  • To investigate the effects of mastication on cognitive processing.
  • To utilize reaction time (RT) and event-related potentials (ERPs) to measure these effects.

Main Methods:

  • Two experiments were conducted involving conditions of mastication, jaw movement, and finger tapping.
  • Participants performed an auditory oddball paradigm.
  • RT and ERPs (P300, N100) were recorded before and after interventions.

Main Results:

  • Mastication significantly reduced RT and P300/N100 latencies compared to pre-chewing baseline.
  • Control conditions (no chewing, jaw movement, finger tapping) showed no significant changes or faster RT/ERPs.

Conclusions:

  • Mastication demonstrably influences cognitive processing speed.
  • This study provides novel evidence of mastication's effect on the central nervous system via ERPs.