Head motion may help mouth opening in children

Kuroda, Kazuaki; Saitoh, Issei; Inada, Emi; Takemoto, Yoshihiko; Iwasaki, Tomonori; Iwase, Yoko; Yamada, Chiaki; Shinkai, Makoto; Matsumoto, Yuko; Hasegawa, Hiroko; Yamasaki, Yuichi; Hayasaki, Haruaki

doi:10.1016/j.archoralbio.2010.08.014

Cited by 10 publications

(8 citation statements)

References 29 publications

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“…To fully evaluate maturity of complex motor programs related to the integration between jaw and neck function in children, a longitudinal study design would be beneficial, and indeed, we aim for that as the next stage. However, cross‐sectional studies are the starting point in many projects, and in the area of dynamic jaw‐neck movements in children, we have only been able to identify one previous study (also cross‐sectional in design) . Thus, in a cross‐sectional design there are confounding variables (skeletal relationship, malocclusions, functional disturbances, breathing, tongue position etc) that relate to head posture and position, often investigated, and controlled for, in relation to static tasks such as clenching.…”

Section: Discussionmentioning

confidence: 99%

“…However, cross-sectional studies are the starting point in many projects, and in the area of dynamic jaw-neck movements in children, we have only been able to identify one previous study (also cross-sectional in design). 18 Thus, in a cross-sectional design there are confounding variables (skeletal relationship, malocclusions, functional disturbances, breathing, tongue position etc) that relate to head posture and position, often investigated, and controlled for, in relation to static tasks such as clenching. Our current aim, however, was to evaluate integrated dynamic jaw-neck movements, where some of these variables (such as head posture and position) cannot be controlled.…”

Section: Limitationsmentioning

confidence: 99%

“…With increased age, children aged 6‐10 years display an increase in vertical jaw displacement (see eg). To the best of our knowledge, there is only one study addressing the functional integration between the jaw‐neck motor system in children, 4‐ to 7‐year‐olds, during jaw opening‐closing movements . The authors suggested that head extension in children helps to increase the jaw opening amplitude of mouth opening.…”

Section: Introductionmentioning

confidence: 99%

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Jaw‐neck movement integration in 6‐year‐old children differs from that of adults

Österlund

Nilsson

Hellström

et al. 2019

J of Oral Rehabilitation

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Limitationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Jaw‐neck movement integration in 6‐year‐old children differs from that of adults

Österlund

Nilsson

Hellström

et al. 2019

J of Oral Rehabilitation

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“…Differences in ethnicity and instructions during the examination of the studied population in these studies may explain the variation of the aMMO values. The mandibular ROM is influenced by many factors, that is age, gender, body height, ethnicity, status of the masticatory system, cervical column function, and head and neck posture (32,36,37). In patients with DMD, sonography indicated fatty infiltration related to the dystrophic changes of the masseter muscle and the suprahyoid muscles (4,11).…”

Section: Discussionmentioning

confidence: 99%

“…The mandibular ROM is influenced by many factors, that is age, gender, body height, ethnicity, status of the masticatory system, cervical column function, and head and neck posture . In patients with DMD, sonography indicated fatty infiltration related to the dystrophic changes of the masseter muscle and the suprahyoid muscles .…”

Section: Discussionmentioning

confidence: 99%

Reduced mandibular range of motion in Duchenne Muscular Dystrophy: predictive factors

Bruggen

Engel-Hoek

Steenks

et al. 2015

J of Oral Rehabilitation

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Patients with Duchenne muscular dystrophy (DMD) experience negative effects upon feeding and oral health. We aimed to determine whether the mandibular range of motion in DMD is impaired and to explore predictive factors for the active maximum mouth opening (aMMO). 23 patients with DMD (mean age 16.7 ± 7.7 years) and 23 controls were assessed using a questionnaire about mandibular function and impairments. All participants underwent a clinical examination of the masticatory system, including measurement of mandibular range of motion and variables related to mandibular movements. In all patients, quantitative ultrasound of the digastric muscle and the geniohyoid muscle and the motor function measure (MFM) scale were performed. The patients were divided into early and late ambulatory stage (AS), early non-ambulatory stage (ENAS) and late non-ambulatory stage (LNAS). All mandibular movements were reduced in the patient group (P < 0.001) compared to the controls. Reduction in the aMMO (<40 mm) was found in 26% of the total patient group. LNAS patients had significantly smaller mandibular movements compared to AS and ENAS (P < 0.05). Multiple linear regression analysis for aMMO revealed a positive correlation with the body height and disease progression, with MFM total score as the strongest independent risk factor (R(2) = 0.71). Mandibular movements in DMD are significantly reduced and become more hampered with loss of motor function, including the sitting position, arm function, and neck and head control. We suggest that measurement of the aMMO becomes a part of routine care of patients with DMD.

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Association between mouth opening and upper body movement with intake of different-size food pieces during eating

Inada

Saitoh

Nakakura-Ohshima

et al. 2012

Archives of Oral Biology

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Head motion may help mouth opening in children

Cited by 10 publications

References 29 publications

Jaw‐neck movement integration in 6‐year‐old children differs from that of adults

Jaw‐neck movement integration in 6‐year‐old children differs from that of adults

Reduced mandibular range of motion in Duchenne Muscular Dystrophy: predictive factors

Association between mouth opening and upper body movement with intake of different-size food pieces during eating

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