RESUMO
The aim of the study was to assess the effectiveness of the new mouthguard design for functional rehabilitation of dental system in athletes involved in contact power sports. The functional state of dental system was evaluated by interferential electromyography of masticatory muscles and Doppler ultrasound examination of periodontal tissues. Before mouthguard use the asynchrony of masticatory muscles was seen which was released after the mouthguard application: electromyographic activity of the left and right masticatory muscles was balanced and the decrease in biopotentials amplitude was found out. The mouthguard also caused no functional disorders in periodontal tissues.
Assuntos
Atletas , Oclusão Dentária Central , Artes Marciais/fisiologia , Músculo Masseter/fisiologia , Protetores Bucais , Luta Romana/fisiologia , Adolescente , Adulto , Eletromiografia/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Contração Muscular , Adulto JovemRESUMO
Radioimmunoassay and morphometry were used to study the time course of the function of the hypothalamus-pituitary-thyroid system in rats cooled under the conditions of the increasing hypoxia-hypercapnia. The changes in the function of this system exposed to combined factors were phasic in nature. The trend of the changes and functional activity of the test system depended, at individual times of cooling, on the pattern of environmental factors and reconstitution of the general body reactivity. It is suggested that the changes in the function of the hypothalamus-hypophysis-thyroid attest to the involvement of this part of the endocrine system in the body response to cooling and are thus one of the essential components in neuroendocrine regulation of the adaptive process responsible for the increased resistance of the animals to the exposure to extremal environmental factors.
