[Electromyographic study of trapezius (middle portion) and rhomboideus major muscles submitted to an isometric tension (author's transl)].
The participation of the trapezius (middle portion) and rhomboideus major muscles submitted to an isometric tension (holding downward dumbells of 11, 15 and 19 kg) was analysed in 40 young adults male volunteers. A 2 channel TECA TE4 electromyograph connected with single coaxial needle electrodes was used. In initial phase of the tests, holding downward, generally the trapezius and rhomboideus major muscles showed activity and no activity respectively. In the cases where activity was present during the downward positions it was reduced gradually until complete rest.
D000200:Action Potentials; D000328:Adult; D001415:Back; D004576:Electromyography; D006801:Humans; D007537:Isometric Contraction; D008297:Male; D009132:Muscles / Q000502:physiology*; D005082:Physical Exertion
Etude électromyographique des muscles trapezius (partie moyenne) et rhomboideus major sousmis à tension isométrique.