Which space lies between the perineal membrane and Colle's fascia?

Which space lies between the perineal membrane and Colle's fascia?

• A. deep perineal space
• B. superficial perineal space
• C. urogenital diaphragm
• D. anal triangle space

Answer: (B)

The space between the perineal membrane and Colles' fascia is the superficial perineal space (superficial perineal pouch). The perineal membrane acts as the superior boundary, while Colles' fascia forms the inferior boundary; Colles' fascia is the membranous layer of the superficial perineal fascia that blends with Scarpa’s fascia in the abdomen. This arrangement creates a potential space that contains superficial perineal muscles (such as the bulbospongiosus and superficial transverse perineal muscles) and related superficial structures in the perineum. In contrast, the deep perineal space lies above the perineal membrane, bounded by the membrane and the superior fascia of the urogenital diaphragm; the anal triangle space is located posteriorly in the ischiorectal region, not in the anterior perineal region; and the urogenital diaphragm refers to a muscular-fascial unit rather than a space.

The space between the perineal membrane and Colles' fascia is the superficial perineal space (superficial perineal pouch). The perineal membrane acts as the superior boundary, while Colles' fascia forms the inferior boundary; Colles' fascia is the membranous layer of the superficial perineal fascia that blends with Scarpa’s fascia in the abdomen. This arrangement creates a potential space that contains superficial perineal muscles (such as the bulbospongiosus and superficial transverse perineal muscles) and related superficial structures in the perineum. In contrast, the deep perineal space lies above the perineal membrane, bounded by the membrane and the superior fascia of the urogenital diaphragm; the anal triangle space is located posteriorly in the ischiorectal region, not in the anterior perineal region; and the urogenital diaphragm refers to a muscular-fascial unit rather than a space.