It is helpful of using the occipital inserts of musculus semispinalis capitus and splenius capitus as the superficial landmarks of the underlying venous sinuses to reduce potential damage during far lateral approach . 2 把头半棘肌和头夹肌的枕骨附着部作为其下静脉窦的表浅解剖性标志有助于减少远外侧入路手术时的静脉窦损伤。