Lecture 25 (8-7-14) Flashcards
What is the Pelvic arterial supply?
- Internal illiac (from common illiac)
- Gonadal a (from aorta)
- Median Sacral a (from aorta)
- Superior rectal a (from inferior mesenteric)
What are the branches of the posterior division of the internal iliac artery including what they do.
ALL SOMATIC BRANCHES!! (POST DIV)
-
Illiolumbar branches ascend
- lumbar a
- iliiac branch
-
Lateral sacral aa
- lots of branches that go out the sacral foramina
-
Superior Gluteal A
- leaves between LS trunk and S1
- (Posterior and superior both starts with con.)
What are the branches of the anterior division of internal iliac?
ANTERIOR IS BOTH Visceral and somatic
- Umbilical a (v) –>superior vesical (V)
- Obturator (s) (supply medial compart thigh)
- Uterine/ aterty to vas deferns (v)
- Inferior vesical/ vaginal (v) (bladder, seminal vesical, prostate)
- Internal Pudendal (s) (perineum)
- Middle Rectal (v)
-
Inferior Gludeal a (s?)
- (Inf and Ant both start with vowles!)
What does the internal pudendal artery do?
Supply perineum
What is the venous drainage of the rectum?
BOTH portal and **systemic **
- Superior Rectal vv. --> inferior mesenteric–> portal vein
- Middle rectal vv–> interinal illiac v. –> IVC
- Inferior rectal vv–> internal pudendal v–> internal illiac v–> IVC
What are the nerves in the lumbosacral plexus and what spinal cord segmends are they?
- Superior Gluteal n (L4-S1)
- Inferior Gluteal (L5-S2)
- Nerve to Piriformis (S1-S2)
- Sciatic (L4-S3)
- Tibial part (L4-S3)
- Fibular part (L4-S2)
- N. to Quadratis femoris (L4-S1)
- N. to Obturator Internus (L5-S2)
- Posterior Femoral Cutaneous (S2-S3)
Identify these nerves
- Superior Gluteal n (L4-S1)
- Inferior Gluteal (L5-S2)
- Nerve to Piriformis (S1-S2)
- Sciatic (L4-S3)
- Tibial part (L4-S3)
- Fibular part (L4-S2)
- N. to Quadratis femoris (L4-S1)
- N. to Obturator Internus (L5-S2)
- Posterior Femoral Cutaneous (S2-S3)
What are the roots of pelvic splanchnics and what do they do?
S2-S4
parasympathetics to pelvis
What is the innervation of the levator ani muscle?
- Levator ani muscles (puboreectalis, puboccoygeus and iliococcygeus)–> nerve to levator ani (s4)
- Coccygeus muscle –> S4, S5
(super gluteal nerve??)
- What spinal cord segments is the pudendal nerve?
- What is the path of pundendal nerve what does it innervate?
3.
- “S2,3,4 keeps your ass off the floor”
- our greater sciatic foramen–> back in lesser sciatic foramen–> give branches to perineal structures.
Ischiovernosus muscle
- ischial tuberosity–> ??
- muscular (deep) br of perineal n–> f/ pudendal nerve (s2-S4) {same as bulbospongiosus}
- compresses veins to keep erection
Bulbospongiosus m
- Perineral body–> clitoral prepuce
- Muscular branch of perineal n–> from pudendal n (S2-S4) {same as ischiocavernosus
- helps erection clitoris and bulb of vestibule
Superficial Transverse Perineal muscle
- iscial tuberosity–>
- Deep branch of perineal nerve–> pudendal nerve (S2-S4)
- Supports pelvic floor
Deep Transverse Perineal
- Deep br of perineal n–> pudendal nerve (S2-S4
- supports floor
- (same as superficial)
Sphincter Urethae Muscle.
- Deep branch of the perineal nerve, branch of pudendal nerve (S2-S4)
- Compresses urethrae to maintain urinary continence.
What are the Autonomic Nerves in the Pelvic Viscera?
Sympathetics L1-S2 spinal levels f/ sympathetic chain
- Hypogastric nn
- Lumbar splanchnic nn
- Sacral Splanchnic nn
Parasympathetics:
- Pelvic splanchnic from S2-S4
