14 下列何者構成坐骨肛門窩（ischioanal fossae）的外側壁？
提肛肌 梨狀肌 尾骨肌 閉孔內肌
ans
閉孔內肌 obturator muscle
尾骨肌 is coccygeal muscle
Boundaries of ischial anal fossa
It has the following boundaries:[1]
| ANTERIOR * fascia of Colles covering the Transversus perinei superficialis * inferior fascia of the urogenital diaphragm | ||
| LATERAL * tuberosity of the ischium * Obturator internus muscle * obturator fascia | SUPERIOR: * Levator ani INFERIOR: | MEDIAL: * Levator ani * Sphincter ani externus * anal fascia |
| POSTERIOR * Gluteus maximus * sacrotuberous ligament |
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