Ligament
Perineal body
A three-dimensional junction of perineal support tissues
High-yield
Think of a tissue junction rather than a single tendon. Bulbospongiosus, transverse perineal structures, anal sphincter-related tissue and pubovisceral fibers contribute to its organization.
Overview
The perineal body lies between the anal canal and the vaginal opening or penile bulb. It is a complex meeting region for connective tissue, smooth muscle and skeletal-muscle attachments. In females it also links the posterior vaginal wall with the perineal membrane and pelvic-floor supports.
Reference facts
- Attachments
- A midline region anterior to the anal canal, connected with bulbospongiosus, transverse perineal tissues, anal sphincter-related fibers, pubovisceral attachments and the perineal membrane.
- Function
- Distributes forces between perineal muscles, vaginal or urethral support tissues and the posterior pelvic outlet.
- Clinical point
- The extent of obstetric injury is defined by involved tissues; perineal muscle injury and anal sphincter injury are distinct grades.
Clinical correlation
Second-degree obstetric tears involve perineal muscle but spare the anal sphincter; deeper tears may involve the sphincter complex. Injury to this region can affect support and function, and an episiotomy does not guarantee preservation of every perineal-body attachment.
Frequently asked questions
Where does the perineal body attach?
A midline region anterior to the anal canal, connected with bulbospongiosus, transverse perineal tissues, anal sphincter-related fibers, pubovisceral attachments and the perineal membrane.
What does the perineal body do?
Distributes forces between perineal muscles, vaginal or urethral support tissues and the posterior pelvic outlet.
Why does the perineal body matter clinically?
The extent of obstetric injury is defined by involved tissues; perineal muscle injury and anal sphincter injury are distinct grades.