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[Human mastication and its observation].

Y Y Shiau1

  • 1College of Medicine, National Taiwan University.

Zhonghua Ya Yi Xue Hui Za Zhi
|September 1, 1989
PubMed
Summary
This summary is machine-generated.

Human jaw movement during chewing is complex, controlled by the brain stem. While initial chewing is voluntary, subsequent movements are centrally regulated and adaptable, showing significant individual variation.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Physiology

Context:

  • Human mastication involves intricate three-dimensional jaw movements.
  • The primary driver is the central pattern generator in the brain stem.
  • Chewing involves both voluntary and centrally regulated actions, influenced by sensory feedback.

Purpose:

  • To analyze the complex biomechanics of human mastication.
  • To understand the neural control mechanisms underlying chewing.
  • To investigate the impact of sensory feedback and pain on jaw movements.

Summary:

  • The initial jaw opening in mastication is voluntary and food-dependent.
  • Subsequent chewing cycles are primarily under central nervous system regulation.
  • Reflex modulation via peripheral and central feedback influences chewing stroke variability.

Related Experiment Videos

  • Pain in oral structures can cause transient or persistent alterations in chewing patterns.
  • Despite extensive study, high individual variability makes categorizing chewing movements impractical.
  • Accurate comparison of normal and abnormal chewing requires precisely defined parameters.

    • Impact:

    • Highlights the complex interplay between neural control and biomechanics in mastication.
    • Underscores the adaptability of the chewing pattern in response to sensory input and pain.
    • Emphasizes the need for rigorous methodology in studying and comparing masticatory movements.