临床发现颈肋综合征的局部病理改变包括颈肋、斜角肌的异常和对臂丛神经的卡压。
The clinical local pathological findings of cervical rib syndrome were the cervical rib, abnormal scalenus and their compression on the brachial plexus.
结果：中斜角肌对臂丛的影响同样重要；
The middle scalene muscle may also influence the brachial plexus.
结论：前、中斜角肌在颈椎横突前、后结节均有起点，该交叉起点可能是上干型胸廓出口综合征的主要原因。
Conclusion:Anterior and middle scalene muscles have starting points in transverse processes of cervical vertebra. Those decussating starting points are the main cause of thorax exit syndrome.
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