Pelvic Structure Flashcards
What is the false pelvis
Upper portion above the pelvic brim or inlet
extends from iliac crest to pelvic brim
What is the false pelvis
Upper portion above the pelvic brim or inlet
extends from iliac crest to pelvic brim
What are the 3 main structures within the true pelvis
bladder rectum and uterus (or prostate)
What anchors the external genitalia
pelvic bone
List examples of structures that will use the pelvis as a means of passage
sciatic nerve
obturator nerve
pudendal nerve
Where is the L1 dermatome
suprpubic
Where is the L2 dermatome
lateral thigh
Where is the L3 dermatome
medial thigh
Where is S2 dermatome
posterior thigh
Where is S3 dermatome
perineum
Where is S4-S5 dermatome
external genitalia
What are the 4 parts of the pelvis
2 os coxae bones
sacrum
coccyx
What are the 3 parts of the os coxae bones
ischium
ilium
pubic bone
What are the two divisions of the pelvis
false pelvis
true pelvis
What is another name for false pelvis
greater pelvis
What is another name for true pelvis
lesser pelvis
Where is the true pelvis located
between pelvic brim and pelvic diaphragm
What structures are found within the false pelvis
sigmoid colon and small intestine
What is the superior boundary of the true pelvis and what is it composed of
pubic symphysis
sacral promontory
linea terminalis
margin of Ala
What are the boundaries of the pelvic outlet
pubic symphysis
coccyx
pubic arch
sacrotuberous ligament
What are the 3 elements of the pelvic bone
ilium
ischium
pubis bones
How is the femoral artery
can use pubic tubercle or ASIS
What type of joint is the lumbosacral joint
2 plane synovial zygopophyseal
What are associated structures of the lumbosacral joint
symphysis
IV disc
iliolumbar ligament
Why type of joint is the sacroiliac joint
synovial plane
What ligaments are associated with the sacroiliac joint
sacrospinous
sacrotuberous
anterior and posterior sacroiliac
What type of joint is the pubic symphysis
secondary cartilaginous
What ligaments are associated with the pubic symphysis
superior and inferior pubic ligament
What type of cartilage is found at the pubic symphysis
fibrocartilage and hyaline
How is the pelvis oriented in anatomic position
ASIS and pubic tubercle in line; anteriorly tilted
What is the function of the sacrotuberous and sacrospinous ligaments
to stabilize the sacrum and prevent upward tilting of the inferior sacrum
What prevents forward sliding of lumbar vertebrae on the sacrum
ileolumbar ligaments
articular processes
What is the most common site of spondylolisthesis
L5-S1
What are the characteristics of male pelvis
heart shaped foramen
narrow angle
more prominent ischial spines
What are the characteristics of a female pelvis
oval shaped foramen
wider angle
not prominent ischial spines
What is the obstetric pelvic diameter
middle of pubic symphysis to sacral promontory
What is the diagonal conjugate pelvic diameter
base of pubic symphysis to sacral promontory
What is the anterior conjugate pelvic diameter
posterior aspect of pubic symphysis to sacral promontory
When will pubic symphysis have increased mobility
during pregnancy due to hormones
What is the interspinous diameter
distance between 2 ischial spines
Which diameter is the only diameter able to be measured during a pelvic exam
diagonal conjugate
What is an open book fracture
pubic symphysis is fractured on both sides resulting in opening of pelvis
How will the pelvis fracture usually
more than one area will fracture at once do to pretzel like structure
What composes the lateral wall of the pelvic cavity
piriformis
obturator internus
What suspends the pelvic viscera
pelvic diaphragm
What composes the pelvic diaphragm
levator ani and coccygeus
What strengthens the pelvic diaphragm
kegel exercises
What is the anococcygeal raphe
longer section of the midline raphe behind the rectum
What muscles compose levator ani
puborectalis
pubococcygeus
ilealcoccygeus
What muscle attaches to tendinous arc of the obturator internus
iliococcygeus
What muscles will attach to the anococcygeal raphe
puborectalis
pubococcygeus
coccygeus
What is levator ani innervated by
S4 anterior rami and inferior rectal nerve
What is the tendinous arc
thickening of obturator internus that serves as an attachment for iliococcygeus
What is coccygeus innervated by
Anterior rami S3-S4
What is the function of the puborectalis muscle
sling around the gut at the junction of the rectum and anal canal
maintains perineal flexure, relaxation leads to defecation
What structures compose the anterior wall of the pelvis
pubic bone
pubococcygeus
puborectalis
What structures compose the lateral wall
obturator internus and iliococcygeus
What structures compose the psoterior wall of the pelvis
coccygeus and piriformis
What structures form the floor of the pelvis
levator ani
Where is the urogenital diaphragm located
inferior to the pelvic diaphragm
What is the perineal membrane
inferior boundary of deep perineal pouch (UGD)
Where do muscles of the pelvic floor and perineum attach
perineal body
What is the perineal body a remnant of
urorectal septum
What are the 3 main structures within the true pelvis
bladder rectum and uterus (or prostate)
What anchors the external genitalia
pelvic bone
List examples of structures that will use the pelvis as a means of passage
sciatic nerve
obturator nerve
pudendal nerve
Where is the L1 dermatome
suprpubic
Where is the L2 dermatome
lateral thigh
Where is the L3 dermatome
medial thigh
Where is S2 dermatome
posterior thigh
Where is S3 dermatome
perineum
Where is S4-S5 dermatome
external genitalia
What are the 4 parts of the pelvis
2 os coxae bones
sacrum
coccyx
What are the 3 parts of the os coxae bones
ischium
ilium
pubic bone
What are the two divisions of the pelvis
false pelvis
true pelvis
What is another name for false pelvis
greater pelvis
What is another name for true pelvis
lesser pelvis
Where is the true pelvis located
between pelvic brim and pelvic diaphragm
What structures are found within the false pelvis
sigmoid colon and small intestine
What is the superior boundary of the true pelvis and what is it composed of
pubic symphysis
sacral promontory
linea terminalis
margin of Ala
What are the boundaries of the pelvic outlet
pubic symphysis
coccyx
pubic arch
sacrotuberous ligament
What are the 3 elements of the pelvic bone
ilium
ischium
pubis bones
How is the femoral artery
can use pubic tubercle or ASIS
What type of joint is the lumbosacral joint
2 plane synovial zygopophyseal
What are associated structures of the lumbosacral joint
symphysis
IV disc
iliolumbar ligament
Why type of joint is the sacroiliac joint
synovial plane
What ligaments are associated with the sacroiliac joint
sacrospinous
sacrotuberous
anterior and posterior sacroiliac
What type of joint is the pubic symphysis
secondary cartilaginous
What ligaments are associated with the pubic symphysis
superior and inferior pubic ligament
What type of cartilage is found at the pubic symphysis
fibrocartilage and hyaline
How is the pelvis oriented in anatomic position
ASIS and pubic tubercle in line; anteriorly tilted
What is the function of the sacrotuberous and sacrospinous ligaments
to stabilize the sacrum and prevent upward tilting of the inferior sacrum
What prevents forward sliding of lumbar vertebrae on the sacrum
ileolumbar ligaments
articular processes
What is the most common site of spondylolisthesis
L5-S1
What are the characteristics of male pelvis
heart shaped foramen
narrow angle
more prominent ischial spines
What are the characteristics of a female pelvis
oval shaped foramen
wider angle
not prominent ischial spines
What is the obstetric pelvic diameter
middle of pubic symphysis to sacral promontory
What is the diagonal conjugate pelvic diameter
base of pubic symphysis to sacral promontory
What is the anterior conjugate pelvic diameter
posterior aspect of pubic symphysis to sacral promontory
When will pubic symphysis have increased mobility
during pregnancy due to hormones
What is the interspinous diameter
distance between 2 ischial spines
Which diameter is the only diameter able to be measured during a pelvic exam
diagonal conjugate
What is an open book fracture
pubic symphysis is fractured on both sides resulting in opening of pelvis
How will the pelvis fracture usually
more than one area will fracture at once do to pretzel like structure
What composes the lateral wall of the pelvic cavity
piriformis
obturator internus
What suspends the pelvic viscera
pelvic diaphragm
What composes the pelvic diaphragm
levator ani and coccygeus
What strengthens the pelvic diaphragm
kegel exercises
What is the anococcygeal raphe
longer section of the midline raphe behind the rectum
What muscles compose levator ani
puborectalis
pubococcygeus
ilealcoccygeus
What muscle attaches to tendinous arc of the obturator internus
iliococcygeus
What muscles will attach to the anococcygeal raphe
puborectalis
pubococcygeus
coccygeus
What is levator ani innervated by
S4 anterior rami and inferior rectal nerve
What is the tendinous arc
thickening of obturator internus that serves as an attachment for iliococcygeus
What is coccygeus innervated by
Anterior rami S3-S4
What is the function of the puborectalis muscle
sling around the gut at the junction of the rectum and anal canal
maintains perineal flexure, relaxation leads to defecation
What structures compose the anterior wall of the pelvis
pubic bone
pubococcygeus
puborectalis
What structures compose the lateral wall
obturator internus and iliococcygeus
What structures compose the psoterior wall of the pelvis
coccygeus and piriformis
What structures form the floor of the pelvis
levator ani
Where is the urogenital diaphragm located
inferior to the pelvic diaphragm
What is the perineal membrane
inferior boundary of deep perineal pouch (UGD)
Where do muscles of the pelvic floor and perineum attach
perineal body
What is the perineal body a remnant of
urorectal septum
