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Feedback control during mastication of solid food textures--a clinical-experimental study
H J Schindler1, E Stengel, W E Spiess
1Federal Research Center for Nutrition, Karlsruhe, Germany.
The Journal of Prosthetic Dentistry
|October 7, 1998
Summary
Peripheral receptors influence chewing force, but not jaw movement, in humans. Periodontal receptors provide positive feedback for chewing force, while jaw joint receptors have minimal impact on masticatory control.
Area of Science:
- Neuroscience
- Biomechanics
- Oral Physiology
Background:
- Peripheral receptors are hypothesized to control food intake dynamics based on animal studies.
- Human studies investigating these mechanisms are limited.
Purpose of the Study:
- To investigate the role of periodontal and jaw joint proprioceptors in human mastication.
- To determine the influence of these receptors on chewing kinematics, force, and muscle activity.
Main Methods:
- Anesthesia of jaw joints and chewing-side teeth in six participants.
- Measurement of chewing kinematics, jaw muscle electromyography, and chewing force during mastication of wine gum.
Main Results:
- Periodontal receptors provide positive feedback crucial for controlling chewing force.
- Jaw joint proprioceptors demonstrated a negligible influence on the control of masticatory movement.
Conclusions:
- Masticatory kinematics and dynamics remain largely unaffected even when proprioception from jaw joints and periodontal receptors is absent.
- Periodontal feedback is essential for chewing force regulation, whereas joint proprioception plays a minor role in movement control.