Ravindranath Y, Manjunath K Y, Ravindranath R
Department of Anatomy, St John's Medical College, Bangalore 560036, India.
Singapore Med J. 2008 Aug;49(8):e217-8.
Incidental finding of an accessory slip of the piriformis muscle in the gluteal region is reported. Following routine dissection of the gluteal region in three formalin-fixed cadavers, an accessory slip of the piriformis was observed. The accessory slip was cleaned, attachments were identified, and dimensions were measured in two parts as fleshy and tendinous parts with a graduated scale to the nearest millimetre. The accessory slip was innervated by a small twig from the sciatic nerve. Having considered the available literature, the accessory slip of piriformis is rare, and if found, could be a cause for the undiagnosed chronic pain in the back and gluteal region, as this accessory slip may compress the sciatic nerve.
报告了在臀区偶然发现梨状肌副束的情况。在对三具用福尔马林固定的尸体的臀区进行常规解剖后，观察到了梨状肌的副束。清理了副束，确定了附着点，并用分度尺测量了其肉质部和腱部两部分的尺寸，精确到毫米。副束由坐骨神经的一小分支支配。考虑到现有文献，梨状肌副束较为罕见，一旦发现，可能是背部和臀区未确诊慢性疼痛的一个原因，因为该副束可能会压迫坐骨神经。
