The deep perineal space is also known as which structure?

• A. Urogenital diaphragm
• B. Ischiorectal fossa
• C. Pelvic cavity
• D. Perineal membrane

Answer: (A)

The deep perineal space is the part of the urogenital diaphragm. It lies just above the perineal membrane within the deep perineal pouch and contains structures such as the deep transverse perineal muscles and the sphincter urethrae (with bulbourethral glands in the male). Because this space essentially forms the deep component of the urogenital diaphragm, it is commonly equated with that structure. The other options refer to different regions: the ischiorectal fossa is a lateral space around the anal canal, the pelvic cavity is the larger space above the pelvic floor, and the perineal membrane is the inferior fascia that helps form the boundary of the diaphragm, not the space itself.