nerves, BV and lymphatics of perineum Flashcards
Where does the pudendal nerve originate
Sacral plexus (S2-S4)
What are the terminal branches of the pudendal nerve?
Inferior rectal
Perineal
Dorsal nerve of penis or clitoris
What does the inferior rectal nerve inervate
Ex. anal sphincter
Sensory for skin of anal triangle
regions of levator ani
What does the perineal nerve supply
Motor branches supply skeletal muscles in the superficial and deep perineal pouches
Sensory - posterior scrotal nerve/posterior labial nerve
What does the dorsal nerve of penis/clitoris innervate?
body or clitoris or penis (particularly the glans)
Apart from the 3 main terminal branches of the pudendal nerve, what are other nerves found in the perineum
Somatic sensory nerves - Branches of ilioinguinal, genitofemoral cutaneous and annococcygeal nerves
Cover and say
cover and say
Name the arteries entering the perineum
Internal pudendal
External pudendal
testicular
cremasteric
What are the branches of the internal pudendal artery>
Inferior rectal artery
perineal artery
branches to erectile tissue of penis/clitoris
What happens to the inferior rectal artery
It anastamoses with the superior and middle rectal arteries to form a network of vessels that supply the rectum and anal canal.
What happens to the perineal artery?
Gives of a transverse perineal branch and a posterior scrotal or labial artery
What happens to the terminal part of the internal pudendal artery?
it accompanies the dorsal nerve of p/c into the depp perineal pouch and supplies branches to the tissues in deep perineal pouch and erectile tissue.
What are the branches of the terminal part of the internal pudendal artery inside the deep perineal pouch? q
Artery to bulb of penis
Urethral artery
deep artery of the penis
Dorsal artery of the penis
What does the artery of bulb of penis supply
Bulbourethral gland
corpus spongiosum
what does the urethral artery supply
Penile urethra and surrounding erectile tissue to the glans
What does the deep artery of the penis supply
crus
corpus spongiosum
What does the dorsal artery of the penis supply
Glans of the penis
Superficial tissues of penis
What does the external pudendal artery supply
related skin of the penis/scrotum, clitoris/labia majora
Describe the course of the testicular arteries
originate in abdomen from aorta
descend to scrotum through inguinal canal
supply the testes
Describe course of cremasteric arteries
Originate from inferior epigastic branch of external iliac artery
Accompany spermatic cord into the scrotum
What is the contents of the spermatic cord
ductus deferens (vas deferens),
the testicular artery and the pampiniform plexus of veins.
the cremasteric artery,
the artery to the vas,
nerve to the cremaster,
sympathetic nerves and the lymphatics of the testis and epididymis.
What part of perineum drain into internal iliac nodes
Deep parts of the perineum
What part of perineum drains into superficial inguinal nodes
Penis/clitoris
Scrotum/labia
what parts of perineum drain into deep inguinal and external iliac nodes
Glans penis, Glans clitoris, labia minora, terminal inferior end of vagina
Where do the testes drain?
via channels that ascend in the spermatic cord, pass through the inguinal canal and course up the posterior abdominal wall and connect directly with the lateral aortic or lumbar nodes AND pre-aortic nodes around the aorta
What does the genitofemoral nerve supply
Upper anterior thigh, as well as the skin of the anterior scrotum in males and Mons pubis in females.
What is the contents of the inguinal canal in male
Spermatic cord (with the genital branch of the genitofemoral nerve) and the ilioinguinal nerve
What is root value of genito femoral nerve
L1-L2
What is the contents of the inguinal canal in female
Round ligament
Genital branch of the genitofemoral nerve
Ilioinguinal nerve
