pelvic diaphragm
Anatomical term for the muscular floor of the pelvic cavity.
The pelvic diaphragm is an important structure that forms the pelvic floor.
骨盤底筋群 refers to the group of muscles in the pelvic floor, while 骨盤隔膜 specifically denotes the diaphragm formed by the levator ani and coccygeus muscles.
Compound of 骨盤 (pelvis) + 隔膜 (diaphragm), a calque from Western anatomical terminology.