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Pelvis 3 - Perineum - UNC MS1 Anatomy
Pelvis 3 - Perineum - UNC MS1 Anatomy
21
Anatomy
Graduate
11/18/2011

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Cards

Term
what is the floor and roof the perineum?
what are the two triangles?
Definition
floor = skin and fascia, roof = pelvic diaphragm
urogenital and anal triangles
Term
pathway from skin inwards in the urogenital triangle
Definition
skin --> superficial perineal fascia (Colles' fascia) --> superficial perineal space --> perineal membrane --> deep perineal space
Term
pathway from skin inwards in the urogenital triangle
Definition
skin --> superficial perineal fascia (Colles' fascia) --> superficial perineal space --> perineal membrane --> deep perineal space
Term
what muscles are in the superficial perineal space?
what are they innervated by?
action?
Definition
ischiocavernosus (compresses clitoris) and bulbospongiosus (compresses erectile tissue of vestibular bulbs and constricts vaginal orifice) and superficial transverse perineal muscle (stabilizes perineal body), innervated by the perineal branch of the pudendal nerve
Term
what do the greater vestibular (Bartholin's) glands do?
Definition
secrete mucous to lubricate the vagina
Term
what is in the deep perineal space?
Definition
deep transverse perineal muscle and the sphincter urethrae (encircles and constricts the urethra), innervated by perineal branches of the pudendal nerve
Term
what causes extravasated urine?
Definition
rupture of the spongy urethra --> urine into superficial space.
can go to scrotum, anterior side of penis, abdominal wall.
CANNOT go to thigh, anal region,
Term
what are the 4 fascia, continuous, covering the superficial perineal space?
Definition
Scarpa's fascia, superficial fascia of penis, Dartos fascia of scrotum, Colle's fascia
Term
what forms the shaft in the male penis?
what is this muscle's action?
Definition
bulbospongiosus coming together.
compresses bulb of penis, preventing venous return, and constricts corpus spongiosum, expelling urine/semen
Term
what is the ischiocavernosus do in a male?
Definition
compresses crus and deep dorsal vein, maintaining erection
Term
what are the three layers of the scrotum coming from the abdomen?
Definition
external spermatic fascia, cremaster fascia and muscle, and internal spermatic fascia
Term
what supplies the scrotum?
Definition
internal and external pudendal arteries
Term
what innervates the scrotum?
Definition
branches from the ilioinguinal, genitofemoral, pudendal, and posterior femoral cutaneous nerves
Term
what innervates the external anal sphincter?
Definition
the inferior rectal nerve
Term
from what vertebrae does the pudendal nerve originate?
what three branches come off the pudendal?
Definition
S2-4
inferior rectal nerve, dorsal nerve (penis/clitoris), perineal nerve (scrotum, urethra or labias)
Term
what supplies the perineum, penis, etc.?
Definition
internal pudendal artery - branch of anterior portion of the internal iliac
Term
what supplies the scrotum?
Definition
external pudendal (from femoral)
internal pudendal (posterior scrotal branch of this)
Term
what supplies the corpora cavernosa?
Definition
internal pudendal giving the deep artery
Term
what nerves are in the ischiorectal fossae?
Definition
pudendal and inferior rectal and perineal branch of the post. fem. cutaneous
Term
what innervates the external anal sphincter?
Definition
the inferior rectal nerve (from the pudendal)
Term
what is the internal pudendal artery?
Definition
terminal portion of the anterior division of the internal iliac artery; supplies the external genitalia
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