TY - JOUR T1 - Maximal root mean square (RMS) of surface electromyography (sEMG) signal in different respiratory muscles JF - European Respiratory Journal JO - Eur Respir J VL - 44 IS - Suppl 58 SP - P2152 AU - Ingrid Azevedo AU - Kardec Aguiar AU - Morgana Evangelista AU - Dayane Montemezzo AU - Vanessa Lima AU - Ana Paula Miranda AU - Danielle Pereira AU - Armele De Andrade AU - Veronica Parreira AU - Marcelo Velloso AU - Raquel Brito AU - Andrea Aliverti AU - Guilherme Fregonezi Y1 - 2014/09/01 UR - http://erj.ersjournals.com/content/44/Suppl_58/P2152.abstract N2 - The most common method of normalizing sEMG signals from a given muscle is to refer it to the signal recorded from the same muscle during a maximal voluntary isometric contraction (MVIC). It is still not fully clear, however, what test should be used to produce maximum neural activation in a given muscle, particularly for sEMG analysis of respiratory muscles. The aim of this study was to evaluate and compare RMS values of sEMG of the sternocleidomastoid (SCM), scalene (SCA), diaphragm (eighth intercostal space, EIS) and rectus abdominal (RA), while performing different maneuvers. 24 healthy subjects underwent the protocol (9M, 15F, age 27,8±7,1 years, BMI 23,7±3,4 kg/m², FVC% 92,20 ± 12,63; FEV1/FVC% 86,56 ± 4,94). After skin preparation , sEMG signals were acquired by wireless sEMG sensors positioned accordingly to previously published protocols (Falla, 2002; De Andrade, 2005; Maarsingh, 2000), during sniff test, MIP, MEP and MVIC of RA, SCM and SCA. Electromyographic values of the maneuvers and respective signal muscle groups are presented on table 1.In conclusion, MVIC specific for the muscles provides the maximal RMS for SCM, SC and RA muscles, while for the EIS the maneuver providing maximal RMS is MVIC of RA. ER -