HFF Flashcards
defined by the pelvic brim. important in the later stages of pregnancy when the head of the fetus descends into the true pelvis
• Pelvic inlet
Pelvic brim
boundary between true pelvis (lesser pelvis) and false pelvis (greater pelvis)
True pelvis
(lesser pelvis) inferior to the pelvic brim. houses pelvic cavity and contains the pelvic viscera
False pelvis
(greater pelvis) superior to pelvic brim. contains abdominal contents
Pubococcygeus
anteriorly body of pubis, which inserts posteriorly to anococcygeal ligament and coccyx
Iliococcygeus
- largest parto of levator ani.
- tendinous arch and ischial spine insert to anoccygeal ligament and coccyx

coccygeus
ischial spine insert into lateral borders coccyx and lower sacrum
pelvic diaphargm innervation
-
pudeneal nerves (S2-4)
- perineal surface
AND
-
3rd-5th sacral nerves
- pelvic surface
corpus cavernosum male and female
- male: veins within get compressed with erection by contraction of ischiocavernosus, which help maintain erection by prevent blood drain
- female: beneath ischiocavernosus, crus of clitoris followed anteriorly and becomes clitoris
name ligaments of hip
- iliolumbar ligament
- anterior and posterior sacroiliac ligament
- SI joints (connet hip bones posteriorly)
- sacrospinous ligament
- sacrotuberous ligament
- pubic symphisis (connect hip bones anteriorly)
- greater sciatic foramen
- lesser sciatic foramen (separated from greater by sacrospinous ligament)

What landmark distinguishes the superior and inferior gluteal arteries and nerves?
- piriformis muscle (above = superior gluteal, below = inferior gluteal)
levator ani insert where?
perineal body
arcus tendinous
separates the obturator internus muscle and levator ani muscles
fecal incontinence
puborectalis damage
erectile bodies female urogenital triangle
- crus of clitoris (anteriorly corpus cavernosum)
- bulb of vestibule
layers of urogenital triangle
- Skin of vulva
- Membranous layer of superficial fascia (Colles’)
- Superficial perineal pouch contents
- Perineal membrane
- Deep perineal pouch contents – muscles and anterior recess of ischioanal fat pad
- Pelvic diaphragm
muscle next to labia minor, and the ones deeper
bulbospongiosus -> vestibular bulb (erectile body communicate with glans clitoris) -> greater vestibular gland (secrete fluid)
male erectile tissue
- 2 corpora cavernosa
- 1 corpus spongiosum
hemorrhoids external vs internal
-
external= painful, venous plexus below pectinate line
- drain into inferior rectal vein (systemic)
-
internal= not painful, venous plexus above pectinate line
- drain into superior rectal vein
lymphatic drainage of prostate
internal iliac and sacral nodes
Inferior hypogastric plexus
autonomic innervation- visceral organs
sympathetic innervation of inferior hypogastric plexus
-
sacral splanchnics and superior hypogastric plexus (by way of hypogastric nerves)
- T10-12 (L3)
- relax bladder and contract sphincter
parasympathetic innervation of inferior hypogastric plexus
- from pelvic splanchnics (S2-S4)
- contract bladder and relax sphincter
lumbosacral plexus is innervated by…
-
somatic
- innervate musculoskeletal or perineal structures
- sciatic nerve (L5-S2), pudendal nerve
- L4, L5 and S1, S2, S3
- all leave pelvis through greater sciatic foramen
superior gluteal nerve target
gluteus medius/minimus
inferior gluteal nerve target
gluteus maximus
pudendal nerve target
perineum (S2-4)