pelvis and perineum Flashcards
the parts of the pelvic bone
Ilium
Ischium
Pubis
pelvic opening ;Subinguinal canal
Abdomen / abdominopelvis and
anterior thigh
pelvic openings :Obturator canal
Pelvis and medial thigh
pelvic openings : Greater sciatic foramen
Pelvis and gluteal region
pelvic openings;Lesser sciatic foramen
Gluteal region and perineum
โfalse pelvisโ
โข The iliac blades contribute to the abdominal cavity
โtrue pelvisโ
Below the pelvic inlet is the pelvic cavity
Pelvic inlet
sacral promontory, sacral ala, arcuate line, pectineal line,
pubic crest
Pelvic outlet - Anterior
pubic symphysis, ischiopubic ramus
Pelvic outlet - posterior
ischial tuberosities, sacrotuberous ligaments and sacrum
Sacroiliac joints
Iliac and sacral ala
Sacrospinous ligament
From sacrum to ischial spine
Sacrotuberous ligament
From sacrum to ischial tuberosity
Sacrotuberous and
sacrospinous
ligaments action
oppose
posterior sacral rotation
what do we use pelvic measurements for
to determine the fixed size of
the birth canal and the
likelihood of a safe vaginal
delivery
pelvic wall muscles :
โ Piriformis
โ Obturator internus
pelvic floor muscles
Funnel shaped muscle that reinforces the pelvic organ
โ Coccygeus
โ Levator ani
โ Levator ani functions
assists in
maintaining fecal and urinary
continence
what forms the levator ani
-Iliococcygeus
โข Pubococcygeus
โข Puborectalis
Anterior defect in the pelvic diaphragm :
urogenital hiatus
perineal body
where all perineal
muscles converge
Episiotomy
oblique cut through muscles to prevent excessive damage to the external anal sphincter
Pudendal canal โ Alcockโs canal
Passage within the obturator fascia (lateral wall of ischioanal
fossa)
Superior gluteal (L4-S1) supplies the :
gluteus medius, minimus,
tensor fascia lata