To help navigate the action, they rely on extra-ocular muscles: Six muscles that move their eyes.
为了判断球场形势，他们需要依靠眼外肌，即控制眼球的六块肌肉。
In the patients with congenital superior oblique paralysis, there may be various anatomic abnormalities, including superior oblique muscles, the superior oblique tendons and the pulleys of extra-ocular muscles.
先天性上斜肌麻痹患者可能存在肌肉、肌腱、直肌滑车多种先天性解剖异常。
