Tabajara Gonzalez | Universidade Nove de Julho (original) (raw)

Papers by Tabajara Gonzalez

Journal of Physical Therapy Science, 2015

[Purpose] Temporomandibular disorder is one of the many different adverse health conditions that ... more [Purpose] Temporomandibular disorder is one of the many different adverse health conditions that can be triggered by stress. Therefore, a biopsychosocial model has been proposed to characterize the multifactorial nature of temporomandibular disorder. The aim of the present study was investigate the correlation of salivary cortisol levels with the activities of the masseter and anterior temporal muscles of patients with different degrees of temporomandibular disorder. [Subjects and Methods] Forty-nine women between 18 and 40 years of age with a diagnosis of myogenous temporomandibular disorder based on the Research Diagnostic Criteria for temporomandibular disorders were evaluated using the Fonseca Index to determine the degree of the disorder. Salivary cortisol levels were determined and surface electromyography was used to evaluate electrical activity in the masticatory muscles. [Results] Positive correlations were found among the degree of temporomandibular disorder, electromyographic activity and salivary cortisol: as women with more severe temporomandibular disorder had greater electrical activity in the muscles analyzed, especially the anterior temporal muscle, and higher levels of cortisol. [Conclusion] Muscle activity was greater among individuals with severe temporomandibular disorder and positive correlations were found among electromyographic activity, salivary cortisol and the degree of temporomandibular disorder severity.

Trials, 2014

According to the International Association for the Study of Pain (IASP), the term temporomandibul... more According to the International Association for the Study of Pain (IASP), the term temporomandibular disorder (TMD) regards a subgroup of orofacial pain, the symptoms of which include pain or discomfort in the temporomandibular joint, ears, masticatory muscles and neck on one or both sides, as well as joint sounds, limited mandibular movements or mandibular deviation and difficulties chewing. Phototherapy, such as low-level laser therapy (LLLT) and light-emitting diode (LED) therapy, is one of the resources used to treatment muscle pain. Thus, there is a need to investigate therapeutic resources that combine different wavelengths as well as different light sources (LLLT and LED) in the same apparatus.The aim of the proposed study is to evaluate the effects of four different doses of phototherapy on pain, activity of the masticatory muscles (masseter and bilateral anterior temporal) and joint mobility in individuals with temporomandibular disorder. A further aim is to determine the cu...

International Journal of Therapeutic Massage & Bodywork: Research, Education, & Practice, 2013

The influence of the neuromuscular system on the cervical region and mastication is directly asso... more The influence of the neuromuscular system on the cervical region and mastication is directly associated with mandibular movements and neck posture. Normal occlusal homeostasis depends on complex sensory feedback mechanisms of the periodontal ligament, temporomandibular joint and other structures of the stomatognathic system. This feedback serves as a regulatory mechanism that helps determine the force and nature of muscle contractions. Alterations in the muscles of mastication, neck muscles, and occlusal characteristics constitute causal factors of imbalances in the postural muscle chains, leading to alterations in the center of pressure (CoP) of the feet. Thus, therapies that seek occlusal reestablishment, such as muscle relaxation techniques, may lead to a restructuring of the global equilibrium of the neuromuscular system and an improvement in body posture.

Revista CEFAC, 2012

ABSTRACT OBJETIVO: comparar dois ângulos cervicais com as classificações oclusais em crianças de ... more ABSTRACT OBJETIVO: comparar dois ângulos cervicais com as classificações oclusais em crianças de 6 a 10 anos com e sem Disfunção Temporomandibular (DTM),identificar se há prevalência de DTM quanto ao gênero, e se há influencia da oclusão sobre os ângulos estudados. MÉTODO: realizou-se um estudo observacional transversal com 91 crianças de ambos os gêneros de uma Instituição de Ensino privado, dispostas em Grupo A (sem DTM) e Grupo B (com DTM). Todas as crianças foram avaliadas seguindo uma ficha cadastral constituída de dados referentes a sexo, idade, peso, altura e exame clínico intra-oral para classificação oclusal de Angle. O diagnóstico e a severidade da DTM, foram verificados pelo questionário proposto por Fonseca. Para avaliação dos ângulos cervicais (A1 e A2) foi utilizada a fotogrametria e o Software Alcimagem®. RESULTADOS: entre as crianças avaliadas, 52 (57,14%) apresentaram maloclusão, sendo 29 com DTM e 23 sem DTM, 39 (42,85%) apresentaram normoclusão, sendo 18 sem DTM e 21 com DTM. Quando comparados os ângulos (A1 e A2) a classe oclusal, foi encontrada diferença significante entre as crianças normoclusivas e maloclusivas com o ângulo A1 (p=0,04). CONCLUSÃO: esse estudo demonstrou que o ângulo A1 (C7, ATM e Ápice do Mento) foi estatisticamente significante quando associado com a condição oclusal. Não foi encontrado associação, na população estudada, entre ângulo cervical e DTM. Além disso, também foi possível observar que, a prevalência de crianças do gênero feminino com DTM é significantemente maior que a do gênero masculino. Esse estudo demonstrou que a maloclusão pode alterar somente o ângulo A1 e que a DTM não interfere nos ângulos cervicais estudados.

Trials, 2014

Background: Osteoarthritis is a chronic disease with a multifactor etiology involving changes in ... more Background: Osteoarthritis is a chronic disease with a multifactor etiology involving changes in bone alignment, cartilage, and other structures necessary to joint stability. There is a need to investigate therapeutic resources that combine different wavelengths as well as different light sources (low-level laser therapy and light-emitting diode therapy) in the same apparatus for the treatment of osteoarthritis. The aim of the proposed study is to analyze the effect of the incorporation of phototherapy into a therapeutic exercise program for individuals with osteoarthritis of the knee. Methods/Design: A double-blind, controlled, randomized clinical trial will be conducted involving patients with osteoarthritis of the knee. Evaluations will be performed using functional questionnaires before and after the treatment protocols, in a reserved room with only the evaluator and participant present, and no time constraints placed on the answers or evaluations. The following functional tests will also be performed: stabilometry (balance assessment), dynamometry (muscle strength of gluteus medius and quadriceps), algometry (pain threshold), fleximeter (range of motion), timed up-and-go test (functional mobility), and the functional reach test. The participants will then be allocated to three groups through a randomization process using opaque envelopes: exercise program, exercise program + phototherapy, or exercise program + placebo phototherapy, all of which will last for eight weeks.

Journal of Physical Therapy Science, 2015

The aim of the present study was to perform a systematic review of the literature on the effects ... more The aim of the present study was to perform a systematic review of the literature on the effects of low-level laser therapy in the treatment of TMD, and to analyze the use of different assessment tools. [Subjects and Methods] Searches were carried out of the BIREME, MEDLINE, PubMed and SciELO electronic databases by two independent researchers for papers published in English and Portuguese using the terms: "temporomandibular joint laser therapy" and "TMJ laser treatment".

Trials, 2014

Background: Type 2 diabetes, also known non-insulin-dependent diabetes, is the most prevalent typ... more Background: Type 2 diabetes, also known non-insulin-dependent diabetes, is the most prevalent type of the disease and involves defects in the secretion and action of insulin. The aim of the proposed study is to evaluate the efficacy of pre-exercise low-level laser therapy (LLLT) on muscle performance of the quadriceps femoris in individuals with type 2 diabetes. Methods/Design: A double-blind, randomized, controlled clinical trial will be carried out in two treatment phases. In the first phase, quadriceps muscle performance will be evaluated using an isokinetic dynamometer and the levels of creatine kinase and lactate dehydrogenase (biochemical markers of muscle damage) will be determined. The participants will then be allocated to four LLLT groups through a randomization process using opaque envelopes: Group A (4 Joules), Group B (6 Joules), Group C (8 Joules) and Group D (0 Joules; placebo). Following the administration of LLLT, the participants will be submitted to an isokinetic eccentric muscle fatigue protocol involving the quadriceps muscle bilaterally. Muscle performance and biochemical markers of muscle damage will be evaluated again immediately after as well as 24 and 48 hours after the experimental protocol. One week after the last evaluation the second phase will begin, during which Groups A, B and C will receive the LLLT protocol that achieved the best muscle performance in phase 1 for a period of 4 weeks. At the end of this period, muscle performance will be evaluated again. The protocol for this study is registered with the World Health Organization under Universal Trial Number U1111-1146-7109. Discussion: The purpose of this randomized clinical trial is to evaluate the efficacy of pre-exercise LLLT on the performance of the quadriceps muscle (peak torque, total muscle work, maximum power and fatigue indexnormalized by body mass) in individuals with DM-2. The study will support the practice of evidence-based to the use of LLLT in improving muscle performance in Individuals with DM-2. Data will be published after the study is completed.

Journal of the Japanese Physical Therapy Association, 2014

This study was to determine whether non-habitual (isotonic) bilateral and unilateral mastication ... more This study was to determine whether non-habitual (isotonic) bilateral and unilateral mastication with eyes open and eyes closed exerts an influence on static balance in individuals without temporomandibular disorder (TMD). An observational, cross-sectional study was conducted involving 20 volunteers aged 20 to 40 years without temporomandibular disorder. Static balance was assessed with the individuals in a quiet standing position on a force plate performing different types of mastication under six separate conditions. Significant differences (p < .05) were found in the area of oscillation during bilateral mastication (eyes open) and the right unilateral mastication, significant differences were only found for oscillation area with eyes open and mediolateral center of pressure with eyes closed (p < .05). The findings of the present study reveal that the stomatognathic system (bilateral and unilateral mastication) promote changes in some variables of static balance.

Journal of Physical Therapy Science, 2012

ABSTRACT [Purpose] The purpose of this study was to verify the effect on body sway during quiet s... more ABSTRACT [Purpose] The purpose of this study was to verify the effect on body sway during quiet standing of the habitual weight carried by students in a backpack. [Subjects] Forty-six students between the ages of 8 and 14 years volunteered. [Method] The percentage of body weight (% BW) of each student’s backpack was calculated and the students were separated into three groups based on the results: Group A (0−7% BW), Group B (7.01−14% BW) and Group C (14.01−21%BW). [Results] The use of the backpack increased the area of the CoP sway, displacement and mean speed of the CoP data in the antero-posterior and medial-lateral directions in Group C. [Conclusion] There- fore, observed responses in the body posture changes caused by the weight of the backpack were similar to those reported in other studies conducted with different methodos of investigation.

Journal of Manipulative and Physiological Therapeutics, 2014

Objective: The purpose of this study was to investigate the effects of massage therapy compared w... more Objective: The purpose of this study was to investigate the effects of massage therapy compared with occlusal splint therapy on mandibular range of motion (ROM) in individuals with temporomandibular disorder (TMD) and compare the results with ROM obtained in a group of individuals without this disorder. Methods: A blinded randomized clinical trial was conducted. Twenty-eight volunteers with TMD were randomly distributed into either a massage therapy group or an occlusal splint group. Both treatments were provided for 4 weeks. Fourteen individuals without TMD were consecutively allocated to a comparison group. Fonseca anamnestic index was used to characterize TMD and allocate the volunteers to either of the intervention groups or asymptomatic comparison group. Mandibular ROM was evaluated before and after treatment using a digital caliper. Two-way repeated-measures analysis of variance with a post hoc Bonferroni testing was used for intergroup and intragroup comparisons (level of significance was set to 5%). Cohen d was used to calculate the effect size. Results: In the intragroup analysis, significant increases in ROM were found for all measures in both the massage and occlusal splint groups (P b .05). A small to moderate clinical effect of treatment with the occlusal splint was found regarding right and left lateral excursion in comparison with the massage therapy and asymptomatic comparison groups (0.2 b d b 0.5). Conclusion: Massage therapy on the masticatory muscles and the use of an occlusal splint lead to an increase in mandibular ROM similar to that of the asymptomatic comparison group with regard to maximum active mouth opening and both right and left excursion in individuals with TMD. (J Manipulative Physiol Ther 2014;37:164-169)

Na eletromiografia de superfície (EMG) os parâmetros espectrais (freqüência media e mediana) bem ... more Na eletromiografia de superfície (EMG) os parâmetros espectrais (freqüência media e mediana) bem como parâmetros temporais (amplitude do sinal) tem sido frequentemente utilizado para monitorar as mudanças das unidades neurais durante as contração isométrica em máximo esforço. Durante a contração estática sustentada, a amplitude do sinal EMG pode aumentar, diminuir ou permanecer quase inalterada equanto que, a frequência media sinal EMG normalmente diminuem 1 . Essa contradição pode ser atribuida a alterações da força de contração e pela fadiga muscular. As mudanças na frequência media (Fmedia) e mediana (Fmed) e na amplitude (RMS) do sinal EMG, são tradicionalmente utilizados como indices para estudos da fadiga muscular, entretanto, em muitos casos esses indices demonstram baixa precisão para identificar as alterações fisiológicas inerentes a esse processo, sendo muitas vezes até controversos. Por esse motivo, Dimitrov et al. 2 , propuzeram um novo indice espectral para análise da fadiga (FInsm5), definido como a razão dos momentos espectrais de ordem (1) nomalizado com momentos espectrais de ordem K= 5. Dessa forma, o objetivo desse estudo foi verificar a correlação desse novo indice com os indices tradicionais (Fmedia, Fmed and RMS) do músculo masseter durante a maxima intercuspidação dental.

Journal of Physical Therapy Science, 2015

[Purpose] Temporomandibular disorder is one of the many different adverse health conditions that ... more [Purpose] Temporomandibular disorder is one of the many different adverse health conditions that can be triggered by stress. Therefore, a biopsychosocial model has been proposed to characterize the multifactorial nature of temporomandibular disorder. The aim of the present study was investigate the correlation of salivary cortisol levels with the activities of the masseter and anterior temporal muscles of patients with different degrees of temporomandibular disorder. [Subjects and Methods] Forty-nine women between 18 and 40 years of age with a diagnosis of myogenous temporomandibular disorder based on the Research Diagnostic Criteria for temporomandibular disorders were evaluated using the Fonseca Index to determine the degree of the disorder. Salivary cortisol levels were determined and surface electromyography was used to evaluate electrical activity in the masticatory muscles. [Results] Positive correlations were found among the degree of temporomandibular disorder, electromyographic activity and salivary cortisol: as women with more severe temporomandibular disorder had greater electrical activity in the muscles analyzed, especially the anterior temporal muscle, and higher levels of cortisol. [Conclusion] Muscle activity was greater among individuals with severe temporomandibular disorder and positive correlations were found among electromyographic activity, salivary cortisol and the degree of temporomandibular disorder severity.

Trials, 2014

According to the International Association for the Study of Pain (IASP), the term temporomandibul... more According to the International Association for the Study of Pain (IASP), the term temporomandibular disorder (TMD) regards a subgroup of orofacial pain, the symptoms of which include pain or discomfort in the temporomandibular joint, ears, masticatory muscles and neck on one or both sides, as well as joint sounds, limited mandibular movements or mandibular deviation and difficulties chewing. Phototherapy, such as low-level laser therapy (LLLT) and light-emitting diode (LED) therapy, is one of the resources used to treatment muscle pain. Thus, there is a need to investigate therapeutic resources that combine different wavelengths as well as different light sources (LLLT and LED) in the same apparatus.The aim of the proposed study is to evaluate the effects of four different doses of phototherapy on pain, activity of the masticatory muscles (masseter and bilateral anterior temporal) and joint mobility in individuals with temporomandibular disorder. A further aim is to determine the cu...

International Journal of Therapeutic Massage & Bodywork: Research, Education, & Practice, 2013

The influence of the neuromuscular system on the cervical region and mastication is directly asso... more The influence of the neuromuscular system on the cervical region and mastication is directly associated with mandibular movements and neck posture. Normal occlusal homeostasis depends on complex sensory feedback mechanisms of the periodontal ligament, temporomandibular joint and other structures of the stomatognathic system. This feedback serves as a regulatory mechanism that helps determine the force and nature of muscle contractions. Alterations in the muscles of mastication, neck muscles, and occlusal characteristics constitute causal factors of imbalances in the postural muscle chains, leading to alterations in the center of pressure (CoP) of the feet. Thus, therapies that seek occlusal reestablishment, such as muscle relaxation techniques, may lead to a restructuring of the global equilibrium of the neuromuscular system and an improvement in body posture.

Revista CEFAC, 2012

ABSTRACT OBJETIVO: comparar dois ângulos cervicais com as classificações oclusais em crianças de ... more ABSTRACT OBJETIVO: comparar dois ângulos cervicais com as classificações oclusais em crianças de 6 a 10 anos com e sem Disfunção Temporomandibular (DTM),identificar se há prevalência de DTM quanto ao gênero, e se há influencia da oclusão sobre os ângulos estudados. MÉTODO: realizou-se um estudo observacional transversal com 91 crianças de ambos os gêneros de uma Instituição de Ensino privado, dispostas em Grupo A (sem DTM) e Grupo B (com DTM). Todas as crianças foram avaliadas seguindo uma ficha cadastral constituída de dados referentes a sexo, idade, peso, altura e exame clínico intra-oral para classificação oclusal de Angle. O diagnóstico e a severidade da DTM, foram verificados pelo questionário proposto por Fonseca. Para avaliação dos ângulos cervicais (A1 e A2) foi utilizada a fotogrametria e o Software Alcimagem®. RESULTADOS: entre as crianças avaliadas, 52 (57,14%) apresentaram maloclusão, sendo 29 com DTM e 23 sem DTM, 39 (42,85%) apresentaram normoclusão, sendo 18 sem DTM e 21 com DTM. Quando comparados os ângulos (A1 e A2) a classe oclusal, foi encontrada diferença significante entre as crianças normoclusivas e maloclusivas com o ângulo A1 (p=0,04). CONCLUSÃO: esse estudo demonstrou que o ângulo A1 (C7, ATM e Ápice do Mento) foi estatisticamente significante quando associado com a condição oclusal. Não foi encontrado associação, na população estudada, entre ângulo cervical e DTM. Além disso, também foi possível observar que, a prevalência de crianças do gênero feminino com DTM é significantemente maior que a do gênero masculino. Esse estudo demonstrou que a maloclusão pode alterar somente o ângulo A1 e que a DTM não interfere nos ângulos cervicais estudados.

Trials, 2014

Background: Osteoarthritis is a chronic disease with a multifactor etiology involving changes in ... more Background: Osteoarthritis is a chronic disease with a multifactor etiology involving changes in bone alignment, cartilage, and other structures necessary to joint stability. There is a need to investigate therapeutic resources that combine different wavelengths as well as different light sources (low-level laser therapy and light-emitting diode therapy) in the same apparatus for the treatment of osteoarthritis. The aim of the proposed study is to analyze the effect of the incorporation of phototherapy into a therapeutic exercise program for individuals with osteoarthritis of the knee. Methods/Design: A double-blind, controlled, randomized clinical trial will be conducted involving patients with osteoarthritis of the knee. Evaluations will be performed using functional questionnaires before and after the treatment protocols, in a reserved room with only the evaluator and participant present, and no time constraints placed on the answers or evaluations. The following functional tests will also be performed: stabilometry (balance assessment), dynamometry (muscle strength of gluteus medius and quadriceps), algometry (pain threshold), fleximeter (range of motion), timed up-and-go test (functional mobility), and the functional reach test. The participants will then be allocated to three groups through a randomization process using opaque envelopes: exercise program, exercise program + phototherapy, or exercise program + placebo phototherapy, all of which will last for eight weeks.

Journal of Physical Therapy Science, 2015

The aim of the present study was to perform a systematic review of the literature on the effects ... more The aim of the present study was to perform a systematic review of the literature on the effects of low-level laser therapy in the treatment of TMD, and to analyze the use of different assessment tools. [Subjects and Methods] Searches were carried out of the BIREME, MEDLINE, PubMed and SciELO electronic databases by two independent researchers for papers published in English and Portuguese using the terms: "temporomandibular joint laser therapy" and "TMJ laser treatment".

Trials, 2014

Background: Type 2 diabetes, also known non-insulin-dependent diabetes, is the most prevalent typ... more Background: Type 2 diabetes, also known non-insulin-dependent diabetes, is the most prevalent type of the disease and involves defects in the secretion and action of insulin. The aim of the proposed study is to evaluate the efficacy of pre-exercise low-level laser therapy (LLLT) on muscle performance of the quadriceps femoris in individuals with type 2 diabetes. Methods/Design: A double-blind, randomized, controlled clinical trial will be carried out in two treatment phases. In the first phase, quadriceps muscle performance will be evaluated using an isokinetic dynamometer and the levels of creatine kinase and lactate dehydrogenase (biochemical markers of muscle damage) will be determined. The participants will then be allocated to four LLLT groups through a randomization process using opaque envelopes: Group A (4 Joules), Group B (6 Joules), Group C (8 Joules) and Group D (0 Joules; placebo). Following the administration of LLLT, the participants will be submitted to an isokinetic eccentric muscle fatigue protocol involving the quadriceps muscle bilaterally. Muscle performance and biochemical markers of muscle damage will be evaluated again immediately after as well as 24 and 48 hours after the experimental protocol. One week after the last evaluation the second phase will begin, during which Groups A, B and C will receive the LLLT protocol that achieved the best muscle performance in phase 1 for a period of 4 weeks. At the end of this period, muscle performance will be evaluated again. The protocol for this study is registered with the World Health Organization under Universal Trial Number U1111-1146-7109. Discussion: The purpose of this randomized clinical trial is to evaluate the efficacy of pre-exercise LLLT on the performance of the quadriceps muscle (peak torque, total muscle work, maximum power and fatigue indexnormalized by body mass) in individuals with DM-2. The study will support the practice of evidence-based to the use of LLLT in improving muscle performance in Individuals with DM-2. Data will be published after the study is completed.

Journal of the Japanese Physical Therapy Association, 2014

This study was to determine whether non-habitual (isotonic) bilateral and unilateral mastication ... more This study was to determine whether non-habitual (isotonic) bilateral and unilateral mastication with eyes open and eyes closed exerts an influence on static balance in individuals without temporomandibular disorder (TMD). An observational, cross-sectional study was conducted involving 20 volunteers aged 20 to 40 years without temporomandibular disorder. Static balance was assessed with the individuals in a quiet standing position on a force plate performing different types of mastication under six separate conditions. Significant differences (p < .05) were found in the area of oscillation during bilateral mastication (eyes open) and the right unilateral mastication, significant differences were only found for oscillation area with eyes open and mediolateral center of pressure with eyes closed (p < .05). The findings of the present study reveal that the stomatognathic system (bilateral and unilateral mastication) promote changes in some variables of static balance.

Journal of Physical Therapy Science, 2012

ABSTRACT [Purpose] The purpose of this study was to verify the effect on body sway during quiet s... more ABSTRACT [Purpose] The purpose of this study was to verify the effect on body sway during quiet standing of the habitual weight carried by students in a backpack. [Subjects] Forty-six students between the ages of 8 and 14 years volunteered. [Method] The percentage of body weight (% BW) of each student’s backpack was calculated and the students were separated into three groups based on the results: Group A (0−7% BW), Group B (7.01−14% BW) and Group C (14.01−21%BW). [Results] The use of the backpack increased the area of the CoP sway, displacement and mean speed of the CoP data in the antero-posterior and medial-lateral directions in Group C. [Conclusion] There- fore, observed responses in the body posture changes caused by the weight of the backpack were similar to those reported in other studies conducted with different methodos of investigation.

Journal of Manipulative and Physiological Therapeutics, 2014

Objective: The purpose of this study was to investigate the effects of massage therapy compared w... more Objective: The purpose of this study was to investigate the effects of massage therapy compared with occlusal splint therapy on mandibular range of motion (ROM) in individuals with temporomandibular disorder (TMD) and compare the results with ROM obtained in a group of individuals without this disorder. Methods: A blinded randomized clinical trial was conducted. Twenty-eight volunteers with TMD were randomly distributed into either a massage therapy group or an occlusal splint group. Both treatments were provided for 4 weeks. Fourteen individuals without TMD were consecutively allocated to a comparison group. Fonseca anamnestic index was used to characterize TMD and allocate the volunteers to either of the intervention groups or asymptomatic comparison group. Mandibular ROM was evaluated before and after treatment using a digital caliper. Two-way repeated-measures analysis of variance with a post hoc Bonferroni testing was used for intergroup and intragroup comparisons (level of significance was set to 5%). Cohen d was used to calculate the effect size. Results: In the intragroup analysis, significant increases in ROM were found for all measures in both the massage and occlusal splint groups (P b .05). A small to moderate clinical effect of treatment with the occlusal splint was found regarding right and left lateral excursion in comparison with the massage therapy and asymptomatic comparison groups (0.2 b d b 0.5). Conclusion: Massage therapy on the masticatory muscles and the use of an occlusal splint lead to an increase in mandibular ROM similar to that of the asymptomatic comparison group with regard to maximum active mouth opening and both right and left excursion in individuals with TMD. (J Manipulative Physiol Ther 2014;37:164-169)

Na eletromiografia de superfície (EMG) os parâmetros espectrais (freqüência media e mediana) bem ... more Na eletromiografia de superfície (EMG) os parâmetros espectrais (freqüência media e mediana) bem como parâmetros temporais (amplitude do sinal) tem sido frequentemente utilizado para monitorar as mudanças das unidades neurais durante as contração isométrica em máximo esforço. Durante a contração estática sustentada, a amplitude do sinal EMG pode aumentar, diminuir ou permanecer quase inalterada equanto que, a frequência media sinal EMG normalmente diminuem 1 . Essa contradição pode ser atribuida a alterações da força de contração e pela fadiga muscular. As mudanças na frequência media (Fmedia) e mediana (Fmed) e na amplitude (RMS) do sinal EMG, são tradicionalmente utilizados como indices para estudos da fadiga muscular, entretanto, em muitos casos esses indices demonstram baixa precisão para identificar as alterações fisiológicas inerentes a esse processo, sendo muitas vezes até controversos. Por esse motivo, Dimitrov et al. 2 , propuzeram um novo indice espectral para análise da fadiga (FInsm5), definido como a razão dos momentos espectrais de ordem (1) nomalizado com momentos espectrais de ordem K= 5. Dessa forma, o objetivo desse estudo foi verificar a correlação desse novo indice com os indices tradicionais (Fmedia, Fmed and RMS) do músculo masseter durante a maxima intercuspidação dental.