Perineum

• Divisions

Coronal section on urogenital

Superficial perineal pouch

Deep perineal pouchPerineal membrane

Lateral view

Posterior view

• Boundaries:

Sup & inf & 2lateral

Post closed

Ant closed

Deep perineal pouch

Deep perineal pouch

Urogenital diaphragm• Contents in male:1. Membranous urethra

2. Sphincter urethrae

3. Deep transversus perinei

4. Bulbourethral gland

5. Internal pudendal vessels

6. Vessels of the bulb

7. Dorsal nerve of penis

• Contents in female:1. Vagina

2. Urethra

3. Sphincter urethrae

4. Deep transversus perinei

5. Internal pudendal vessels

6. Vessels of the bulb

7. Dorsal nerve of clitoris

• Post. division of perineum

• Boundaries

• Contents:

a) anal canal

b) ischiorectal fossa

Isch. F

• Wedge-shaped

• Fascial lined space on each side of the anal canal

• Filled with fat to accommodate the dilatation of anal canal during defecation

• Boundaries:

Inf. (base) Skin of perineum lateral to anal canal

Sup. (edge) white line

• Boundaries:

Medial levator ani muscle & fascia & external anal sphincter

Lateral obturator int. Muscle & fascia

• Boundaries:Ant. Superf. And deep transversus perinei separated by perineal membrane

Post. Sacrotuberous lig & gluteus maximus

• Contents:

Fat

Inferior rectal vessels& nerves

• Contents:

• Contents:

Transvers perineal vesselsInferior rectal vessels& nerves

• Contents:

Perineal branch of 4th sacral nerve

• Contents:

Scrotal (labial) nerves &vessels