The Function of Brachioradialis

Activation of the Shoulder Belt and Shoulder Muscles in Humans Providing Generation of “Two-Joint” Isometric Efforts

“…It is probable that this is due to the fact that this muscle not only fulfills the function of the forearm flexor but also stabilizes the head of the shoulder bone, i.e., presses it against the tendon surface of the shoulder blade by the tendon [60][61][62][63][64]. The active involvement of the Br in the generation of two-joint isometric efforts, including efforts oriented along the axis of the forearm (zero moment of the force for the elbow joint), results from the polyfunctionality of this muscle and its participation both in flexion of the forearm and in pronation of the latter and stabilization of the angle in the elbow joint [65,66].…”

Inner structural organization of the distal humerus in Paranthropus and Homo

“…Differences in the development of such muscle, which is responsible for both flexion of the forearm and pronation of a supine forearm, and supination of a prone forearm, are associated in extant humans with differences in flexion to extension movement patterns at the elbow (Rhodes and Knüsel, 2005). Specifically, in humans the M. brachioradialis primarily acts as elbow stabilizer during flexion tasks (Boland et al, 2008). Nonetheless, it is also true that a certain variation in the degree of expression of the supracondylar crest, as well as in the differences between maximum second moment of area, I max , and second moment of area in the mediolateral plane, I y (range: from 0 up to 48%) are present even within our limited reference sample.…”

Untitled

“…Такі ЕМГ розглядалися як відображення суперпозиції центральних моторних команд (ЦМК) у ряді робіт [5][6][7]. Показано, що формування повільних ізоме-тричних зусиль, які розвивають м›язи плеча та плечового пояса людини, зумовлено насамперед м'язами, які є агоністами віднос-но певного рухового патерна [8][9][10][11][12][13]. Вивчали також моторні команди при двосуглобних ізометричних рухових актах, що надходили до м'язів плеча та передпліччя.…”