SM_220-221b: Anatomy of the Pelvis and Perineum I and II Flashcards
___ is the diamond-shaped pelvic outlet
Perineum is the diamond-shaped pelvic outlet
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/481/325/a_image_thumb.png?1610227330)
Perineum is subdivided into the ____ and ____
Perineum is subdivided into the anterior urogenital triangle and posterior anal triangle
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/481/474/a_image_thumb.png?1610227373)
Perineum has superior boundary of ____ and lateral boundary of ____
Perineum has superior boundary of pelvic diaphragm and lateral boundary of obturator internus muscle
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/481/652/a_image_thumb.png?1610227433)
Urogenital diaphragm is ____ closing off the urogenital triangle
Urogenital diaphragm is two fascial layers closing off the urogenital triangle
- Superior fascia of urogenital diaphragm
- Inferior fascia (perineal membrane)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/481/726/a_image_thumb.png?1610227488)
____ is deep to urogenital diaphragm
Pelvic diaphragm is deep to urogenital diaphragm
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/481/786/a_image_thumb.png?1610227511)
Describe perineum landmarks in midsagittal segment
Perineum landmarks in midsagittal segment
- Male: UG diaphragm is always in line with pubic symphysis and perineal body in front of the rectum
- Female: UG diaphragm and perineal body are in line with pubc symphysis
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/481/842/a_image_thumb.png?1610227585)
Pubovesicular ligmanent in the female is analogous to ___ in the male
Pubovesicular ligmanent in the female is analogous to puboprostatic ligament in the male
Muscles in the UG diaphragm are ____ and ____
Muscles in the UG diaphragm are external urethral sphincter and deep transverse perineal muscle
- Bulbourethral gland in male is also within UG diaphragm
- Greater vestibular gland in female is superficial to UG diaphragm
Deep pouch is ____, while the superficial pouch is ____
Deep pouch is interior of the UG diaphragm, while the superficial pouch is the scrotum or labia majora (superficial body wall)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/046/a_image_thumb.png?1610227852)
Superficial pouch of Colle’s fascia is tightly attached to the ____ and ____
Superficial pouch of Colle’s fascia is tightly attached to the back edge of the UG diaphragm and perineal body and fascia lata of the thigh
- Blood or urine in the superficial pouch can only pass upward into the body wall between the superficial and deep layers
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/104/a_image_thumb.png?1610227906)
Superficial pouch contains ____
Superficial pouch contains everything superficial to the UG diaphragm
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/176/a_image_thumb.png?1610227944)
Diaphragms from deep to superficial are ____ and ____
Diaphragms from deep to superficial are pelvic diaphragm and UG diaphragm
- Pelvic diaphragm: levator ani (pubococccygeus, iliococcygeus), ischiococcygeus
- UG diaphragm: superficial fascia and inferior fascia (perineal membrane)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/195/a_image_thumb.png?1610228113)
Describe contents of the superficial pouch of the UG diaphragm
Contents of the superficial pouch of the UG diaphragm
- Bulb and crura of penis, clitoris, vestibular bulb, and greater vestibular gland
- Bulbospongiosus, ischiocavernosus, and superficial transverse perineal muscles in both sexes
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/370/a_image_thumb.png?1610228179)
___ is enlarging the birth canal for an anticipated difficult birth
Episiotomy is enlarging the birth canal for an anticipated difficult birth
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/408/a_image_thumb.png?1610228215)
Midline episiotomy involves cutting ____
Midline episiotomy involves cutting the central tendon of the perineum (and wall of vagina)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/442/a_image_thumb.png?1610228238)
Mediolateral episiotomy involves cutting the ____
Mediolateral episiotomy involves cutting the UG diaphragm, bulbospongiosus, and superficial transverse perineal muscles
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/449/a_image_thumb.png?1610228273)
____ is somatic innervation (S2-4) for perineum body wall
Pudendal nerve is somatic innervation (S2-4) for perineum body wall
- Perineum body wall: UG diaphragm, genitalia, external anal sphincter, and skin of perineum
- Branches: inferior rectal branch, perineal, and dorsal nerve of penis
![](https://s3.amazonaws.com/brainscape-prod/system/cm/332/482/477/a_image_thumb.png?1610228355)