Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-15T22:11:58Z No. of bitstreams: 1 IngridGuerraAzevedo_DISSERT.pdf: 2031705 bytes, checksum: eb74d521336e77556d793f40b4e8a342 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-20T00:46:41Z (GMT) No. of bitstreams: 1 IngridGuerraAzevedo_DISSERT.pdf: 2031705 bytes, checksum: eb74d521336e77556d793f40b4e8a342 (MD5) / Made available in DSpace on 2016-04-20T00:46:41Z (GMT). No. of bitstreams: 1 IngridGuerraAzevedo_DISSERT.pdf: 2031705 bytes, checksum: eb74d521336e77556d793f40b4e8a342 (MD5) Previous issue date: 2014-10-21 / O objetivo deste estudo foi estabelecer um padr ? o de normaliza??o da eletromiografia de superf?cie para os m?sculos respirat?rios esternocleidom astoideo (ECOM), escaleno (ESC) e reto abdominal ( RA ) . M?todos : Foram avaliados sujeitos saud?veis em rela??o a dados antropom?tricos, espirometria e s EMG durante a execu??o de cinco manobras distintas : sniff teste, press?o inspirat?ria m?xima (PIm?x), press?o expirat?ria m?xima (PEm?x) e c ontra? ? o Volunt?ria M ? xima Isom?trica (CVMI) dos m?sculos RA , ECOM e ESC. Para coloca??o dos eletrodos, a pele foi preparada com abras?o, seg uida de tricotomia, nas seguintes regi?es para aquisi??o dos sinais de eletromiografia: (1) ECOM: ter?o inferior da dist?ncia entre o processo mastoide e a articula??o esternoclavicular; (2) ESC: 5 cm para a direita a partir da articula??o esternoclavicula r e, neste ponto, 2 cm para cima e (3 ) RA : ao n?vel da cicatriz umbilical, 4 cent?metros ? direita . Na an?lise das vari?veis eletromiogr?ficas, a normalidade dos dados foi avaliada pelo teste Shapiro - Wilk . Compara??es entre as manobras inspirat?rias estudadas foram realizadas por meio do teste de Friedman e para manobras expirat?rias, teste de Mann Whitney . Ao dividir a amostra entre homens e mulheres, foi aplicado o teste de Mann - Whitney e Teste t de student de acordo com a normalidade dos dados . Re sultados : 35 sujeitos aceitaram participar do estudo, mas 5 foram exclu?dos ( IMC>25 kg/m? ) . A amostra foi composta por 30 sujeitos (1 5 mulheres), idade m?dia 25,7 ? 6,42 anos , IMC 22,2 ? 1,73 kg/m? e ?ndices espirom?tricos dentro dos limites considerados normais. A CVMI para os m?sculos ECOM, ESC e RA foi a que apresentou maior valor de RMS . Conclus?o: A manobra de CVMI para ECOM, ESC e RA foi a que apresentou maiores valores de RMS . Quando comparamos a RMS das manobras estudadas entre os grupos, n?o houve diferen?a significativa entre eles. / Aim : To evaluate and to standardize surface electromyography (sEMG) normalization procedures for respiratory muscles by comparing muscle activation during Maximal Voluntary Isometric Contraction (MVIC) and Maximal Respiratory Pressures (MIP, MEP and sniff test). Methods: Healthy subjects were evalua ted regarding demographics, spirometry and sEMG during the five maneuvers: sniff test, MIP , MEP and Maximal Voluntary Isometric C ontraction (MVIC) of RA, SCM and SC A . For electrode placement, skin was prepared with abrasion, followed by shaving in the foll owing regions for acquisition of el ectromyographic signals: (1) SC M: lower third of the distance between the mastoid process and t he sternoclavicular joint; (2) SC A : 5 cm to the right from the sternoclavicular joint and at this point, up to 2 cm; and (3 ) RA: the level of umbilicus, 4 cm to the right. In electromyographic variables analysis , the data normality was assessed by Shapiro - Wilk test. Comparisons among studied maneuvers were performed by Friedman Test and Dunn?s post - hoc for multiple comparisons a mong inspiratory maneuvers, and Mann Whitney test for expiratory maneuvers. Subgroups differences between genders were performed by Student's t test or Mann - Whitney test according to data normality. Results: 35 subjects participated in the study, b ut 5 we re excluded (BMI> 25 kg/ m?). Sample consisted of 30 subjects (1 5 women), mean age 27.3?7.43 years, BMI 22.2 ? 1.69 kg/m? and spirometric indices within normal limits. Specific MVIC for SCM, SCA and RA showed the highest RMS. When we grouped sample into gender we found no difference among RMS values for the studied SCM maneuvers, while for SCA, MVIC SCM / SCA was the one with the highest RMS and for RA, MVIC RA in men. Once considering women, MVIC SCM/SCA showed the highest RMS for SCM, SCA and MVIC RA showed t he highest value for RA. Conclusion: MVIC for SCM, SCA and RA muscles showed the highest RMS values. When comparing RMS between the studied groups, there was no significant difference between men and women.