Male Pelvis

Question 1

What is the nerve supply of the testis?

Which other external genetalia has the same blood supply?

Answer 1

Sympathetic nerves from T10
Pass in lesser splanchnic nerves to coeliac ganglion and then run with the testicular artery

PS nerves from pelvic splanchnic nerves via inferior hypogastric plexus

Visceral nerve afferents share same pathway as sympathetic

Epididymis

Question 2

What are the 3 nerves carried in the spermatic cord?

Answer 2

Genital branch. of genito-femoral nerve
Sympathetic nerves
Ilio-inguinal nerve

Question 3

What is the nerve supply of the scrotum?

Answer 3

Anterior 1/3 by ilio-inguinal nerve + genital branch genitofemoral nerve (L1)

Posterior 2/3 form perineal nerve (S3) + posterior femoral cutaneous nerve (S2)

Question 4

What is the nerve supply of the penis?

Answer 4

Pudendal nerve via posterior scrotal nerve + dorsal nerve penis

Question 5

What is the nerve supply of the prostate gland?

Answer 5

Inferior hypogastric plexus
PS - glands
Sympathetic - muscle to empty glands at ejaculation

Question 6

What is the nerve supply of the seminal vesical?

Answer 6

From inferior hypogastric plexus; mainly sympathetic (L1)

division causes sterility

Question 7

What is the nerve supply urethra?

Answer 7

Penile portion form perineal nerve

Question 8

What are the nerves to the male reproductive organs?

Answer 8

Ilio-hypogastric nerve
Ilio-inguinal nerve
Genito-femoral nerve

Question 9

What are the nerves to the male pelvic organs?

Answer 9

Inferior hypogastric plexus
Sacral splanchnic nerves
Pelvic splanchnic nerves
Pudendal nerve

Question 10

Describe the innervation of ejaculation

Answer 10

Under sympathetic + somatic control 
Symp outflow (T11-L2) causes smooth muscle contraction of epididymis, vas deferens, seminal vesicles, ejaculatory ducts + prostate, transporting seminal fluid to prostatic urethra 

Thereafter rhythmic contraction of muscles (bulbo-spongiosus + ischio-cavernosus) supplied by perineal nerve - compresses penile urethra to expel the seminal fluid

Contraction of internal urethral meatus prevents retro-grade flow into bladder

Question 11

Which nerves are responsible for erection?

Answer 11

Under para-sympathetic control via pelvic splanchnic nerves (S2-S4)
Causes vasodilation vessels in copora cavernosa