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Lateral preference in mastication: a feasibility study.

L V Christensen, J T Radue

    Journal of Oral Rehabilitation
    |September 1, 1985
    PubMed
    Summary
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    Masticatory lateral preference, or favored chewing side, was studied in 25 adults. While random in spot checks, a preferred chewing side reliably predicted bolus placement, suggesting motivational behavior influences chewing preference.

    Area of Science:

    • Oral physiology
    • Biomechanics of mastication
    • Human motor control

    Background:

    • Mastication involves complex neuromuscular coordination.
    • Lateral preference in chewing, or masticatory lateral preference, is a poorly understood phenomenon.
    • Previous research has not clearly identified factors influencing chewing side preference.

    Purpose of the Study:

    • To investigate the occurrence and predictability of masticatory lateral preference.
    • To determine if hand laterality correlates with chewing side preference.
    • To explore the role of motivational behavior in lateral preference during mastication.

    Main Methods:

    • Twenty-five healthy adults (15 males, 10 females) participated.
    • Participants chewed sugarless gum for 15, 20, and 25 seconds.

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  • Visual inspection assessed bolus placement on the right or left side of the mouth.

    • Main Results:

    • No significant differences were found in bolus placement between right and left sides across observation series.
    • Individual spot checks indicated random lateral preference.
    • A previously identified favored chewing side reliably predicted observed masticatory lateral preference.
    • Hand laterality did not predict observed lateral preference.

    Conclusions:

    • Masticatory lateral preference is not random but influenced by an individual's favored chewing side.
    • Motivational factors, rather than hand dominance, likely drive consistent chewing side preference.
    • Further research into the motivational aspects of chewing behavior is warranted.