Lecture 2 - Pelvic Cavity I Flashcards
What are the branches of the external iliac artery in the pelvic cavity?
L2 S3 LO1
- deep circumflex artery
- inferior epigastric artery
What are the branches of the anterior division of the internal iliac in the pelvic cavity?
L2 S5 LO1
- umbilical artery
- obturator artery
- inferior vesicle artery (male)
- uterine artery (female)
- internal pudendal artery
- inferior gluteal artery
- middle rectal artery
What are the branches of the posterior division of the internal iliac in the pelvic cavity?
L2 S13-14 LO1
- iliolumbar artery
- lateral sacral artery
- superior gluteal artery
What are the branches of the abdominal aorta that supply the pelvic cavity?
L2 S16 LO1
- testicular artery (male)
- ovarian artery (female)
- inferior mesenteric artery
- median sacral artery
What is the venous drainage of the pelvic cavity?
L2 S17 LO1
Most named with corresponding arteries except:
Pampiniform plexus:
-in spermatic cord
Internal rectal venous plexus:
-superior-most anastomosis of three rectal veins
External rectal venous plexus:
- inferior-most anastomosis of three rectal veins
- hemorrhoids
What provides autonomic innervation to the pelvic cavity?
L2 S19 LO2
Pelvic splanchnic nerve (S2-4) (parasympathetic)
Coccygeal plexus (S4-5, Co)
Sacral splanchnic nerve (sympathetic)
Lumbar splanchnic nerve (sympathetic)
Sacral splanchnic nerve (sympathetic)
What is the pelvic diaphragm and what does it consist of?
L2 S30-31 LO3
Muscular sheet across pelvic outlet that supports pelvic organs.
Levator ani complex consists of:
- puborectalis
- pubococcygeus
- iliococcygeus
Coccygeus
What muscle plays a major role in control of dedication and creates the anorectal angle?
L2 S33
Puborectalis
What are the boundaries of the perineum and how is what is the perineum divided into?
L2 S36 LO3
Boundaries:
- pubic symphysis (anterior)
- coccyx (posterior)
- ischial tuberosities (lateral)
Divided into:
- anal triangle (coccyx to ischial tuberosities)
- urogential triangle/diaphragm (ischial tuberosities to pubic symphysis)
What muscles are associated with the perineum?
- sphincter urethrae
- deep transverse perineal
Superficial space:
- ischiocavernosus
- bulbospongiosus
- superficial transverse perineal
What is the blood supply and innervation of the perineal muscles?
L2 S38 LO3
Blood supply:
-internal pudendal
Innervation:
- pudendal nerve (somatic)
- sacral (autonomic)
What is proximal and distal attachment of the sphincter urethrae muscle and what / its actions?
L2 S39 LO3
Proximal attachment:
-medial inferior pubic ramus
Distal attachment:
- urethra
- contralateral muscle fiber
Action:
-constricts urethra (and vagina in females)
What is proximal and distal attachment of the deep transverse perineal muscle and what are its actions?
L2 S39 LO3
Proximal attachment:
- ischiopubic ramus
- ischial tuberosity
Distal attachment:
- median raphe
- perineal body
- external anal sphincter
Action:
-supports and fixes perineal body to viscera
What is proximal and distal attachment of the superficial transverse perineal muscle and what are its actions?
L2 S46 LO3
Proximal attachment:
-ischial tuberosity
Distal attachment:
-central tendon perineum (perineal body)
Action:
-stabilize central tendon
What is proximal and distal attachment of the ischiocavernosus muscle and what are its actions?
L2 S46 LO3
Proximal attachment:
- ischiopubic ramus
- ischial tuberosity
Distal attachment:
-corpus cavernosus of penis and clitoris
Action:
-maintains erection of penis and clitoris by compressing venous drainage
