19 負責肩胛後縮(scapular retraction)運動的主要肌群為:
(A)中斜方肌及下斜方肌(middle and lower trapezius)
(B)上斜方肌及下斜方肌(upper and lower trapezius)
(C)菱形肌及中斜方肌(rhomboids and middle trapezius)
(D)小圓肌及胸小肌(teres minor and pectoralis minor)

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統計: A(1), B(0), C(0), D(1), E(0) #1218484