Methods : The blood supply and nerve innervation of pectoralis minor muscle the comparison of the morphology and dimension of both pectoralis minor muscle and thenar muscle were investigated on 20 sides of adult cadaveric thoraxes and hands .

方法：在20侧成人 胸部及手 部标本中， 解剖 观察胸小肌的血管神经分布及胸小肌和大鱼际肌的形态、大小 并 将二 者进行比较；