In the early 1900s, French otologist Pierre Bonnier wrote a case study on a patient who only partially projected from their body into the astral plane.

在 1900 年代初期，法国耳科医生皮埃尔·邦尼尔 (Pierre Bonnier) 撰写了一篇关于一名患者的案例研究， 该患者的身体仅部分投射到星光层。