conclusions: the contraction of the posterior components of the anterior and middle scalene muscle may be the main reason of the upper trunk thoracic outlet syndrome.
结论:前中斜角肌在颈椎横突的前、后结节均有起点,该交叉起点是上干型胸廓出口综合征的主要病因。
results:anterior scalene muscle originates from transverse processes of 3~6 cervical vertebrae. middle scalene muscle starts from transverse processes of 2~7 or 2~6 cervical vertebrae.