SUPINATOR RADII LONGUS
\sˈuːpɪnˌe͡ɪtə ɹˈe͡ɪdɪˌa͡ɪ lˈɒŋɡəs], \sˈuːpɪnˌeɪtə ɹˈeɪdɪˌaɪ lˈɒŋɡəs], \s_ˈuː_p_ɪ_n_ˌeɪ_t_ə ɹ_ˈeɪ_d_ɪ__ˌaɪ l_ˈɒ_ŋ_ɡ_ə_s]\
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It is seated at the anterior and outer part of the forearm. It arises from the inferior part of the outer edge of the os humeri, and from the external intermuscular aponeurosis; and is inserted, by a long tendon, into the outer edge of the radius, near the base of the styloid process. It causes the supination of the forearm, which it can likewise bend on the arm.
By Robley Dunglison
