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Jaw-neck movement integration in 6-year-old children differs from that of adults
Umeå University, Faculty of Medicine, Department of Odontology.ORCID iD: 0000-0002-8986-9401
Umeå University, Faculty of Medicine, Department of Odontology.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.ORCID iD: 0000-0002-0366-4609
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2019 (English)In: Journal of Oral Rehabilitation, ISSN 0305-182X, E-ISSN 1365-2842Article in journal (Refereed) Epub ahead of print
Abstract [en]

BACKGROUND: A functional integration between the jaw and neck regions during purposive jaw movements is well described in adults, but there is a lack of knowledge of such integration during jaw function in children.

OBJECTIVES: To determine the movement integration between the jaw and neck during jaw motor tasks in 6-year-olds, whether there is a difference between children and adults.

METHODS: Jaw and neck movements were recorded with an optoelectronic 3D system in 25 healthy 6-year-olds (12 girls, 13 boys) and 24 healthy adults (12 women, 12 men) during paced jaw opening-closing and self-paced gum chewing. Jaw and neck movement amplitudes, intra-individual variation in movement amplitude, ratio between neck-jaw movement amplitudes and movement cycle time were analysed. Differences between children and adults were evaluated with Mann-Whitney U test for independent samples.

RESULTS: Compared to adults, 6-year-old children showed larger neck movement amplitudes (P = .008) during chewing, higher intra-individual variability in amplitudes of jaw (P = .008) and neck (P = .001) movements, higher ratio between neck-jaw movement amplitudes for jaw opening-closing (P = .026) and chewing (P = .003), and longer jaw movement cycle time (P ≤ .0001) during the jaw opening-closing task.

CONCLUSION: Despite integrated jaw-neck movements in 6-year-old children, the movement pattern differs from that of adults and may be interpreted as an immature programming of jaw-neck motor behaviour. The well-integrated movements observed in adults most likely develop over years, perhaps into adolescence, and needs further research including well-controlled longitudinal studies to map this development in order to provide appropriate age-related clinical treatment for functional disorders.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019.
Keywords [en]
adult, child, head, jaw, motor activity, movements
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-163875DOI: 10.1111/joor.12865ISI: 000483252900001PubMedID: 31357241Scopus ID: 2-s2.0-85070938798OAI: oai:DiVA.org:umu-163875DiVA, id: diva2:1358050
Available from: 2019-10-07 Created: 2019-10-07 Last updated: 2019-10-21

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Österlund, CatharinaNilsson, EvelinaHäger, Charlotte

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