Term
what is the floor and roof the perineum?
what are the two triangles? |
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Definition
floor = skin and fascia, roof = pelvic diaphragm
urogenital and anal triangles |
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Term
| pathway from skin inwards in the urogenital triangle |
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Definition
| skin --> superficial perineal fascia (Colles' fascia) --> superficial perineal space --> perineal membrane --> deep perineal space |
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Term
| pathway from skin inwards in the urogenital triangle |
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Definition
| skin --> superficial perineal fascia (Colles' fascia) --> superficial perineal space --> perineal membrane --> deep perineal space |
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Term
what muscles are in the superficial perineal space?
what are they innervated by?
action? |
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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 |
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Term
| what do the greater vestibular (Bartholin's) glands do? |
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Definition
| secrete mucous to lubricate the vagina |
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Term
| what is in the deep perineal space? |
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Definition
| deep transverse perineal muscle and the sphincter urethrae (encircles and constricts the urethra), innervated by perineal branches of the pudendal nerve |
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Term
| what causes extravasated urine? |
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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, |
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Term
| what are the 4 fascia, continuous, covering the superficial perineal space? |
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Definition
| Scarpa's fascia, superficial fascia of penis, Dartos fascia of scrotum, Colle's fascia |
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Term
what forms the shaft in the male penis?
what is this muscle's action? |
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Definition
bulbospongiosus coming together.
compresses bulb of penis, preventing venous return, and constricts corpus spongiosum, expelling urine/semen |
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Term
| what is the ischiocavernosus do in a male? |
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Definition
| compresses crus and deep dorsal vein, maintaining erection |
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Term
| what are the three layers of the scrotum coming from the abdomen? |
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Definition
| external spermatic fascia, cremaster fascia and muscle, and internal spermatic fascia |
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Term
| what supplies the scrotum? |
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Definition
| internal and external pudendal arteries |
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Term
| what innervates the scrotum? |
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Definition
| branches from the ilioinguinal, genitofemoral, pudendal, and posterior femoral cutaneous nerves |
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Term
| what innervates the external anal sphincter? |
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Definition
| the inferior rectal nerve |
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Term
from what vertebrae does the pudendal nerve originate?
what three branches come off the pudendal? |
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Definition
S2-4
inferior rectal nerve, dorsal nerve (penis/clitoris), perineal nerve (scrotum, urethra or labias) |
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Term
| what supplies the perineum, penis, etc.? |
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Definition
| internal pudendal artery - branch of anterior portion of the internal iliac |
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Term
| what supplies the scrotum? |
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Definition
external pudendal (from femoral)
internal pudendal (posterior scrotal branch of this) |
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Term
| what supplies the corpora cavernosa? |
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Definition
| internal pudendal giving the deep artery |
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Term
| what nerves are in the ischiorectal fossae? |
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Definition
| pudendal and inferior rectal and perineal branch of the post. fem. cutaneous |
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Term
| what innervates the external anal sphincter? |
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Definition
| the inferior rectal nerve (from the pudendal) |
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Term
| what is the internal pudendal artery? |
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Definition
| terminal portion of the anterior division of the internal iliac artery; supplies the external genitalia |
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