Lassmann G
Acta Neuropathol. 1984;62(3):254-6. doi: 10.1007/BF00691860.
Investigations of the existence and distribution of muscle spindles and tendon organs in the human voluntary anal sphincter muscle in 53 cases of autopsy material from both female and male persons (age: 27th week of gestation to 81 years) brought forward the following results: Similar to animals, muscle spindles are formed in the last trimenon of gestation. They are more numerous as has been expected hitherto and there are different types with a different content of intrafusal fibers. Lamellar corpuscular organs are situated around the ending of the muscle fibers in the anal skin. In our opinion they are to substitute muscle tendon organs which could not be detected.
对53例男女尸检材料（年龄：妊娠27周-81岁）的人类随意性肛门括约肌中肌梭和腱器官的存在及分布进行研究，得出以下结果：与动物相似，肌梭在妊娠晚期形成。它们比迄今预期的数量更多，并且存在不同类型，其梭内纤维含量不同。环层小体器官位于肛门皮肤中肌纤维的末端周围。我们认为它们是用来替代未检测到的肌腱器官的。
