Ligament
Perineal membrane
Support tissue linking the pubic arch and pelvic outlets
High-yield
The membrane separates superficial from deeper perineal regions, but it is also a major attachment surface. Female ventral and dorsal portions have different tissue relationships.
Overview
The perineal membrane connects tissues of the urogenital triangle to the pubic arch. It supports the erectile roots and integrates with the urethral sphincter region and, in females, the vagina and perineal body. Human studies show a complex structure rather than a simple perforated triangle.
Reference facts
- Attachments
- Attaches to the ischiopubic rami and connects with the perineal body, sphincter tissues and genital roots; an anterior interval accommodates dorsal vascular structures.
- Function
- Anchors erectile and outlet tissues and participates in support at the boundary of the superficial and deep perineal regions.
- Clinical point
- Its relationship to the urethra and surrounding fascia helps interpret trauma; the membrane alone does not determine all extravasation pathways.
Clinical correlation
The membrane helps orient urethral injuries, but injury classification and fluid spread also depend on sphincter, fascial and pelvic damage. Posterior limitation of superficial extravasation involves fascial attachments, not merely a free edge of the membrane.
Frequently asked questions
Where does the perineal membrane attach?
Attaches to the ischiopubic rami and connects with the perineal body, sphincter tissues and genital roots; an anterior interval accommodates dorsal vascular structures.
What does the perineal membrane do?
Anchors erectile and outlet tissues and participates in support at the boundary of the superficial and deep perineal regions.
Why does the perineal membrane matter clinically?
Its relationship to the urethra and surrounding fascia helps interpret trauma; the membrane alone does not determine all extravasation pathways.