Effects of masticatory exercise on cognitive function in community-dwelling older adults

Kim, Tae-Hoon

doi:10.3233/thc-218013

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…Further research is required to understand better the relationship between ageing, body composition and neuromuscular control of masticatory muscles in PWID. Additionally, studies should explore the potential impact of masticatory muscle training, either alone or combined with physical activity exercise, on overall health and well-being, including cognitive function (Chuhuaicura et al 2019;Lin et al 2020;Kim 2021;Yang et al 2022).…”

Section: Discussionmentioning

confidence: 99%

Neuromuscular control of masticatory muscles in people with intellectual disability, middle‐aged adults and older adults

Cruz‐Montecinos,

Valderrama‐Mejías,

Martínez‐Arnau

et al. 2023

J intellect Disabil Res

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BackgroundMotor control issues are common for people with intellectual disabilities (PWID), resulting in difficulties with basic activities of daily living, including eating. Mastication, which is crucial for digestion and overall health, is poorly understood in this population. PWID shows frailty similar to older people, highlighting the importance of comparing masticatory motor control with older adults. This study compared the neuromuscular control of the masticatory muscles in middle‐aged, PWID and older adults.MethodsA cross‐sectional analytical design was used. During the mastication task of a carrot piece (2 cm in diameter and weighing 0.5 g), surface electromyography was used to record muscle activity patterns from the right and left masseter and temporalis muscles. Principal component analysis (PCA) was used to assess neuromuscular control. A z‐score normalisation of the first component's variance from PCA to identify those individuals with altered neuromuscular control. A mixed ANOVA was performed to assess the interaction between principal components, groups and body composition.ResultsThirty PWIDs (aged 35–55 years), middle‐aged adults and 32 older adults were recruited. PWID and older adults showed decreased neuromuscular control of the masticatory muscles compared to middle‐aged control adults (P < 0.05). PWID had the highest proportion of individuals with altered neuromuscular control of the masticatory muscle (53%) compared to older adults (19%) and middle‐aged adults (0%) (P < 0.05).ConclusionsOur results indicate that PWID and older adults have reduced neuromuscular control compared to middle‐aged adults. Notably, a significant proportion of the PWID showed altered masticatory muscle control compared to older adults. Further research is needed to explore the potential benefits of masticatory muscle training for PWID.

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Section: Discussionmentioning

confidence: 99%

Neuromuscular control of masticatory muscles in people with intellectual disability, middle‐aged adults and older adults

Cruz‐Montecinos,

Valderrama‐Mejías,

Martínez‐Arnau

et al. 2023

J intellect Disabil Res

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“…Both approaches show positive findings. The effects on cognitive function with masticatory exercise intervention exhibit promising results 63 , 64 , 65 , 66 , 67 Jaw-tapping, a form of masticatory exercise, for four weeks improves memory function in cognitively impaired patients. 63 The oral rehabilitation of four edentulous patients, in the case of converting from removable dentures to implant-retained dentures, resulted in improved working memory and oral health quality of life.…”

Section: Brain-stomatognathic Axismentioning

confidence: 99%

“… 64 Evidence suggests that masticatory function has a positive influence on cognitive function. 51 , 60 , 63 , 64 , 65 , 66 , 67 …”

Section: Brain-stomatognathic Axismentioning

confidence: 99%

Importance of oral health in mental health disorders: An updated review

Skallevold

Rokaya²,

Wongsirichat

et al. 2023

Journal of Oral Biology and Craniofacial Research

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“…While it is not clear whether poor oral health predicts dementia, substantial data suggests that oral health declines as cognitive impairment and dementia progresses [ 7 , 12 , 14 , 15 , 16 ]. Furthermore, it has been demonstrated that masticatory exercise improves cognitive function in older adults [ 17 ] and thus the link between cognitive decline and masticatory dysfunction is now clear [ 8 , 18 , 19 , 20 , 21 , 22 ]. As loss of masticatory activity [ 8 , 11 , 12 , 13 , 18 , 19 , 20 , 21 , 22 ] and sedentary life style [ 23 , 24 ] are risk factors for age-related cognitive decline, there is a need to focus attention on those sub-populations that experience greater oral health deterioration or impairment of the stomatognathic system, and those having living sedentary lives.…”

Section: Introductionmentioning

confidence: 99%

The Sedentary Lifestyle and Masticatory Dysfunction: Time to Review the Contribution to Age-Associated Cognitive Decline and Astrocyte Morphotypes in the Dentate Gyrus

Mendes

Almeida

Falsoni

et al. 2022

IJMS

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As aging and cognitive decline progresses, the impact of a sedentary lifestyle on the appearance of environment-dependent cellular morphologies in the brain becomes more apparent. Sedentary living is also associated with poor oral health, which is known to correlate with the rate of cognitive decline. Here, we will review the evidence for the interplay between mastication and environmental enrichment and assess the impact of each on the structure of the brain. In previous studies, we explored the relationship between behavior and the morphological features of dentate gyrus glial fibrillary acidic protein (GFAP)-positive astrocytes during aging in contrasting environments and in the context of induced masticatory dysfunction. Hierarchical cluster and discriminant analysis of GFAP-positive astrocytes from the dentate gyrus molecular layer revealed that the proportion of AST1 (astrocyte arbors with greater complexity phenotype) and AST2 (lower complexity) are differentially affected by environment, aging and masticatory dysfunction, but the relationship is not straightforward. Here we re-evaluated our previous reconstructions by comparing dorsal and ventral astrocyte morphologies in the dentate gyrus, and we found that morphological complexity was the variable that contributed most to cluster formation across the experimental groups. In general, reducing masticatory activity increases astrocyte morphological complexity, and the effect is most marked in the ventral dentate gyrus, whereas the effect of environment was more marked in the dorsal dentate gyrus. All morphotypes retained their basic structural organization in intact tissue, suggesting that they are subtypes with a non-proliferative astrocyte profile. In summary, the increased complexity of astrocytes in situations where neuronal loss and behavioral deficits are present is counterintuitive, but highlights the need to better understand the role of the astrocyte in these conditions.

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Effects of masticatory exercise on cognitive function in community-dwelling older adults

Cited by 5 publications

References 33 publications

Neuromuscular control of masticatory muscles in people with intellectual disability, middle‐aged adults and older adults

Neuromuscular control of masticatory muscles in people with intellectual disability, middle‐aged adults and older adults

Importance of oral health in mental health disorders: An updated review

The Sedentary Lifestyle and Masticatory Dysfunction: Time to Review the Contribution to Age-Associated Cognitive Decline and Astrocyte Morphotypes in the Dentate Gyrus

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