6 Questions
What is the location of the perineum?
Between the anus and genital area
What is the purpose of the pelvic floor muscles?
To support pelvic organs
What is the function of the perineum in relation to urinary and fecal continence?
To maintain urinary and fecal continence
Which muscle is NOT a perineal muscle?
Tibialis anterior muscle
What is the name of the triangle that contains the anus and surrounding muscles?
Posterior triangle
What is the role of the perineum in childbirth?
To support vaginal delivery
Study Notes
Anatomy of the Perineum
- Located between the anus and genital area (scrotum in males, vulva in females)
- Diamond-shaped region bounded by the following landmarks:
- Anteriorly: pubic symphysis
- Posteriorly: coccyx
- Laterally: ischial tuberosities
- Medially: anus
Divisions of the Perineum
-
Anterior (urogenital) triangle:
- Contains genital organs (penis, scrotum, or vulva)
- Bound by the pubic symphysis, ischiopubic rami, and ischial tuberosities
-
Posterior (anal) triangle:
- Contains the anus and surrounding muscles
- Bound by the coccyx, ischial tuberosities, and sacrotuberous ligaments
Muscles of the Perineum
-
Pelvic floor muscles:
- Pubococcygeus muscle
- Iliococcygeus muscle
- Puborectalis muscle
-
Perineal muscles:
- Bulbospongiosus muscle
- Ischiocavernosus muscle
- Transverse perineal muscle
Functions of the Perineum
- Supports pelvic organs (bladder, uterus, rectum)
- Maintains urinary and fecal continence
- Involved in sexual function and sensation
- Plays a role in childbirth (vaginal delivery)
Explore the structure and functions of the perineum, including its divisions, muscles, and roles in supporting pelvic organs and maintaining continence.
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