Spinocerebellar ataxia: Functional analysis of the stomatognathic system

Abstract

Background Neurodegenerative diseases that affect the cerebellum, especially in elderly individuals, cause impairment of motor coordination and quality of life. The presente study evaluated the electromyographic activity and thickness of the right and left masseter and temporal muscles, and the maximum molar bite force of individuals with spinocerebellar ataxia. Material and Methods Twenty-eight individuals were divided into two groups: those with (n=14) and without (n=14) spinocerebellar ataxia. Data on the masticatory muscles obtained from the electromyographic activity (resting, right and left laterality and protrusion), muscle thickness (maximal voluntary contraction and tensile strength) and maximum bite force (right and left) were tabulated and descriptive analysis using Student’s t-test ( P ≤ 0.05). Results In the comparison between groups, greater electromyographic activity was demonstrated for individuals with spinocerebellar ataxia, with a statistically significant difference in protrusion and laterality for the temporal muscles ( P = 0.05). There was no statistically significant difference between the groups for masticatory muscles thickness in the conditions evaluated. For maximum molar bite force, the group with spinocerebellar ataxia showed lower bite force ( P ≤ 0.05). Conclusions The data obtained suggest that spinocerebellar ataxia promotes functional reduction in the stomatognathic system, mainly affecting the electromyographic activity and bite force, hindering chewing, with a resultant alteration of nutritional intake and a decrease of quality of life. Key words: Spinocerebellar ataxia, electromyography, muscle thickness, bite force, masseter muscle, temporal muscle.

Cerebellar Prediction and Feeding Behaviour

“…Aside from its involvement in the movement required to locate food and bring it to the mouth, the cerebellum contributes to the two main motor components of consuming food: mastication (chewing) and swallowing [43]. Cerebellar injuries, stroke, and ataxia are associated with difficulties swallowing (dysphagia) and chewing [44,45,46,47,48], demonstrating the importance of an intact cerebellum in the physical ability to eat. This section will discuss the role of the cerebellum in both the voluntary (mastication and initiation of swallowing) and involuntary (passive swallowing) motor aspects of food ingestion.…”

Análise do sistema estomatognático em indivíduos com esclerose sistêmica pré e pós-transplante autólogo de células-tronco

“…Outro fato importante que é demonstrado pela literatura é que a atividade eletromiográfica em repouso mandibular para os músculos mastigatórios é maior em indivíduos com doenças crônico degenerativas quando comparada com indivíduos que não estão acometidos com doenças crônicas (DONIZETE VERRI et al, 2019;FERREIRA et al, 2019;GONCALVES et al, 2018;PALINKAS et al, 2018). É evidenciado que a atividade mioelétrica em repouso mandibular é mínima nos músculos associados com o processo mastigatório (HERMENS et al, 2000).…”

Variáveis respiratórias e força oclusal dos jogadores de futebol: abordagem após treino e destreino durante lockdown pela COVID-19

“…A avaliação da força de mordida é um protocolo utilizado para demonstrar informações sobre o status funcional do organismo humano por meio das limitações estruturais do sistema estomatognático (FERREIRA et al, 2019;GONCALVES et al, 2018). Nenhum estudo na literatura analisou a força de mordida molar máxima de jogadores profissionais de futebol após o destreinamento em razão do lockdown decorrente da COVID-19, então comparar nossos resultados com os de outros estudos fica comprometida.…”