pelvic area and perineal area Flashcards
bulbospongiosus attachments and actions male
from median raphe and perineal body to surround bulb of penis empties urethra, maintains erection, contracts during ejaculation
ejaculatory ducts
slender tubes that rise from the union of ductus deferns and seminal glands. are on the neck of the bladder and pass anterioinferiorly through middle part of prostate alongside prostatic utricle.
Pelvic cavity functions
contains and supports bladder, rectum, anal canal and reproductive tracts
fundus of bladder
opposite apex, formed by posterior wall
what contributes to semen
sperm from ductus deferens nutrient rich material from ejaculatory duct prostatic juices from prostate fluid from bulbourethral glands
ampulla of ductus deferns
enlargement on posterior side of bladder just before it meets with seminal glands
bulb of vestibule
paired masses of elongated erectile tissues along side vaginal orifice, superior or deep to labia minora and immediately inferior to perineal membrane. homologus to bulb of the penis
dartos fascia
continuous with perineal fascia to cover the penis and scrotum.
Neck of bladder
where the fundus and inferolateral surfaces meet inferiorly on the bladder, just above the urethra.
Apex of bladder
points towards superior edge of pubic symphysis
scrotum
cutaneous fibromuscular sac for tests and associated structures. scrotal raphe separates the two sides and is continuous with penile raphe and perineal raphe. septum dartos muscles
what gland is most posterior in the penis
corpus cavernosum (2) fused
Infundibulum
distal end of the uterine tube that opens into the peritoneal cavity with the fimbriae.
Ischial ramus attachments
ischiocavernosus compressor urethrae m
pudendeal cleft
central depression when thighs are adducted, wihtin which is the labia minora and vestibule
bulbospongiosus m. females action and attachments
perineal body to surround vestibular bulb, vaginal oriface and clitoris constructs vaginal orifice, contributes to erection of clitoris
middle rectal a.
anterior diviision of internal iliac descends in pelvis to inferior rectum supplies inferior rectum, seminal glands, and prostate. @superior and inferior rectal a.
female urethra
short and passes anterioinferely from urinary bladder orifice is located between labia minora
trigone
space on internal part of bladder between the two ureters and urethra rich in receptors that are sensitive to stretching to signal brain of a full bladder.
nerve blocks of pudendal and ilioinguinal
are only somatic nerve blocks and will not block pain from uterine contraction. must do a spinal block at L3-4
pubic symphysis
symphysis joint between pubic bones on either side of pelvis has fibrocartilaginous inter-pubic disc
Obturator internus muscles
covers and pads the lateral pelvic walls from anterolateral wall of pelvis, obturator foramen and obturator membrane through the lesser sciatic foramina to medial surface of greater trochanter innervated by sacral plexus (nerve of obturator internus) bloody supply from obturator and internal pudendal a.
Superior pubic ramis features
pecten pubic obturator groove
inferior vesicle artery
only in males, is replaced by vaginal artery in females off of the internal iliac, inferior gluteal branch origin: anterior internal iliac passes subperitoenally in lateral ligament of bladder suppies inferior male bladder, prostate, seminal glands
ischiocavernosus muscle females att and actions
ischial tuberosity and ramus to aponeurosis surrounding crus of the clitoris compresses crus during erection
Emission
sperm is delivered to prostatic urethra rhythmic contraction of ductus deferens and ejaculatory duct sympathetic L1-2
Dorsal surface of sacrum attachements
erector spinae, gluteus maxiumus m, sacrotuberous and sacrospinous ligament
name for foreskin
prepuce
Pelvic inlet
defined by the ridge of bone from superior sacrum to superior pubic symphysis opening into true previs
Body of the penis
free pendulous part of penis corpus spongiosum glands corpa cavernosum
Erection innervation
Blood dilates cavernous spaces in corpora of penis requires relaxation of smooth muscles in helicine arteries Parasympathetic S2-4 from prostatic plexus This causes blood to fill into helicine a. and compress the dorsal vein so it is pinched off. bulbospongiosus and ischiocavernosus also contract to keep blood in distal portion of penis
Promotory attachments
on top of sacrum attaches to anterior longitudinal ligmanet
Anterior superior Iliac Spine attachment
inguinal ligmanet
Fundiform ligament of the penis
irregular mass of collagena nd elestic fibers that descent in midline from linea alba anterior to pubic symphysis. it splits to surround the penis and then unites and blends with dartos fascia to form scrotal spetum lie superficial to suspensory ligament
tunica albuginea
outer fobrous covering of each cavernous body in the penis
Ureters path
muscular tubes that connect kidney to urinary bladder retroperitoneal cross over bifurcation of common iliac artery and pass over pelvic brim to enter lesser pelvis. Run along lateral walls between pelvic peritoneum and internal iliac arteries. They then curve antero-medially, superior to levator ani and enter urinary bladder obliquely.
what is inferior to pevic outlet
perineal area
Tendinous arch
tendinous arch of levator ani thickening of obturator fascia between pubis and ilium pelvic diaphragm attaches to it covers the obturator internus muscle
Pecten pubic attachments
conjoined tendon, lacunar and pectineal ligaments
glans of clitoris
most outward projection at tip of bodies
Cardinal ligmanet
transverse cervical: extend from supravaginal cervix and later parts of the fornix to the vagina to the lateral walls of the pelvis
Ligament of the ovary
peritoneum fold that tether the ovary to the uterus. This is a remnant of the female gubernaaculum.
Sphincter urethrovaginalis att and actions
from perineal body, surrounds vagina and urethra to meet contralateral muscle inferior to compressor urethra deep to perineal membrane compresses urethra and vagina
Fundus of uterus
superior to where the uterine tubes split off
arterial supply of vulva
internal pudendal arteries.
Obturator fascia
covers the pelvic surface of the obturator internus muscle
Ischial spine attachments
levator ani, coccygeus m. sacrospinous ligament
Perineal membrane
stretches between the two sides of the pubic arch and covers urogential triangle. fills anterior aspect of pelvic diaphgram, but is perforated by urethra and vagina. Has foundation of erectile bodies of the external genetalia of penis and scrotum, and vulva for females. separates the deep pouch from the superficial pouch
Round ligament of the uterus
remnant of the gubernaculum lower part, goes through inguinal ring to attach to the labium majora distally
Interosseous sacroiliac ligmanet
lies deep between the tuberosities of sacrum and ilium between articular surfaces of sarcum and ilium responsible for transferring weight of the upper body from the axial skeleton to the two ilia of appendicular skeleton
sacrospinous ligament
passes from ischial spine to lateral margin of sacrum subdivides foramen into greater and lesser sciatic foramina
lumosacral trunk
L4 and L5 and passes inferiory to ala of sacrum to join sacral plexus
Ovaries
female gonads located usually inferior to the uterine tubes. not covered in peritoneum.
Bulb of penis
enlarged posterior part of the bulb formed by corpus spongeosum gland
what two ligaments support the cervix and uterus
uterosacral ligmanet cardinal ligment
what parts of the uterus are covered by the peritoneum?
all areas anteriorly and superiorly except the cervix.
Median sacral crest
spinous process of sacrum erector spinae gluteus maximus
prepuce of clitoris
foreskin of clitoris that covers up the glans of the clitoris anterior to labia minora
how does urine move through ureters
peristaltic contractions
colliculus semilunaris
rounded eminence of urethral crest in prostatic segment of urethra contains the prostatic utricle
rectouterine pouch
pouch created between uterus and rectum created by peritoneum adhering to posterior vaginal wall and reflecting superiorly on anterior part of rectum
membranous segment of urethra
intermediate part of urethra that goes through the deep perineal pouch
veinous drainage of vagina
vaginal venous plexus which are continous with uterovaginal venous plexus
pelvic outlet
defined by ischial spines, pubis, sacrum and coccyx
ampulla of rectum
lies just superior to and supported by pelvic diaphragm and anococcygeal ligamanet receives and hold fecal matter until defecation
Mesovarium
ligament that surrounds the ovary on posterior side
fimbria
finger like processes at the end of the infundibulum of the uterine tube that spread over the medial surface of the ovary
testicular a. males
origin: abdominal aorta Descends retroperitoneally to transverse the inguial canal and enter scrotum. blood supply to: abdominal ureter, testis, and epididymis anastomeses with cremasteric a and ductus deferens a.
perineal membrane spaces
the perineal membrane is still has open spaces with the anterior recess of the ischioanal fossa and the deep postnatal space.
Greater vestibular gland
located in superficial perineal pouch lie on each side of the vestibule, posterolateral to the vaginal orifice. round or oval and partly overlapped by bulbs of vestibule. secrete mucus during sexual arousal
Deep fascia of the penis
also known as buck fascia continuation of deep perineal fasica srrong membranous covering of corpa caveronosa and spongiosum and binds them together
vesicouterine pouch
formed by peritoneum reflecting on the uterus and posterior superior surface of the bladder
bulbospongiosus muscles
form a constrictor that compresses the bulb of the penis and the corpus spongiosum.
pubis body attachments
levator ani
Lumbosacral joint
symphysis joins 5th lumbar vertebra and base of sacrum
urogential triangle
anterior to the line formed between the ischial tuberosities closed by a thin sheet of tough, deep fascia, the perineal membrane. houses the urethra and vagina (in females)
Pelvic diaphragm
inferior border of the pelvic cavity from pubic symphysis to coccyx and sacrum
Mons pubis
is the rounded fatty eminence anterior to pubic symphysis, pubic tubercles and rami. covered with hair
iliolumbar
posterior division of internal iliac ascends anterior to sacroiliac joint and passes posterior to common iliac vessels and psoas major supplies: psoas, iliacus, QL, cuada equina
Lesser sciatic notch function
transmits obturator internus tendon, pudendeal n., and internal pudendal a and v
Changes in size of uterus
starts small and increases during pregnancy and puberty Post-partum, takes a while to shrink back to normal size (with multiple births it might not shrink back) Menopause, goes back to pre-puberty size
innervation and blood supply of levator ani
pudendal n and S4 inferior gluteal, internal pudendal, inferior rectal, and inferior visceral a
Benign prostate hypertrophy
with advancing age, prostate starts to grow around urethra and compresses on urethra –> difficult and painful urination
anal triangle
formed posterior to the lines between the ischial tuberosities houses the anal canal and its orifice.
Anterior commisure
part of labia major, thickness where they join anteriorly
Urinary Bladder
most anterior pelvic viscera made up of four surface features: apex, fundus, neck, and urachus sac made of detruser msucles
Peritoneum in pelvic cavity
continuous with abdominal cavity but does not reach pelvic floor, instead reflects on pelvic viscera. Only covers completely uterine tubes.
perineal body
deep the skin posterior to the vestibule or bulb of the penis and anterior to anus. site of convergence for interlacing fibers of: bulbospongiosus external anal sphincter superficial and deep transverse perineal muscles
Uterus
thick-walled pear shaped organ. body lies on the urinary pladder and its cervis is between the bladder and rectum made up of: fundus, corpus, and cervix
sphincter ani externus muscles action and attachments
from perineal body to anococcygeal raphe closes anal canal and fixes perineal body
Root of the penis
the attached part has crura and bulb ischiocavernsus and bulbosponiosus muscles found in superficial perineal pouch
perimetrium
out surface of the uterus made of connective tissue
innervation and blood supply of coccygeus
ventral rami S4-5 inferior gluteal, internal pudendal and inferior rectal a.
umbilical artery
Origin: anterior division of internal iliac pass along lateral pelvic wall and ascent to anterior abdominal wall through umbilicial ring into umbilical cord. prenatally: conduct oxygen and nutrient deficient blood to placenta for replenishment after birth, vessels no longer function and become occluded distal to branches to bladder. patent afts from anterioinferely between urinary bladder and lateral wall of pelvis.
sacral canal
houses sacral spinal roots
piriformis m.
most posterior aspect of pelvic cavity from anterolateral sacrum through the greater sciatic foramin to upper border of the greater trochanter deep is the sacral plexus innervation: lumbosacral plexus blood supply: lateral sacral, superior gluteal, internal pudendal a.
pariteal pelvic fascia
membranous layer that lines inner aspect of muscles forming walls and floor of pelvis. contains obturator fascia continous with trasversalis and ilipsoas fascia
male internal reproductive organs
Tests epididymis ductus deferens seminal glands ejaculatory ducts prostate bulbourethral glands bladder, urethra