the arteries of the pelvis: posterior trunk & minor arteries of pelvis Flashcards
what does the posterior trunk give rise to?
arteries that supply the lower posterior abdominal wall, posterior pelvic wall and the gluteal region
what are the branches of the posterior trunk of the internal iliac artery?
Iliolumbar artery
Lateral sacral arteries (superior and inferior)
Superior gluteal artery
where does the iliolumbar artery travel?
Ascends to exit the lesser pelvis, dividing into a lumbar and iliac branch
what does the lumbar branch of the iliolumbar artery supply?
psoas major, quadratus lumborum and the posterior abdominal wall
what does the iliac branch of the iliolumbar artery supply?
the muscles and bone around the iliac fossa
where does the Lateral sacral arteries (superior and inferior) travel?
Travel infero-medially along the posterior pelvic wall
what does the Lateral sacral arteries (superior and inferior) supply?
structures in the sacral canal, and the skin and muscle posterior to the sacrum
what is the superior gluteal artery a branch of?
The terminal branch of the posterior trunk
where does the superior gluteal artery exit the pelvic cavity?
via the greater sciatic foramen
where does the superior gluteal artery enter the gluteal region?
superiorly to the piriformis muscle
what is the major blood supply function of the superior gluteal artery?
blood supply to the muscles and skin of the gluteal region
what are the minor arteries of the pelvis?
Gonadal Arteries
Median Sacral Artery
Superior Rectal Artery
which is the major gonadal artery in females?
ovarian artery
where does the ovarian artery arise from in females?
arises from the abdominal aorta, distal to the origin of the renal arteries
where does the ovarian artery travel from going to the pelvis?
The artery descends towards the pelvis, crossing the pelvic brim and the origin of the external iliac vessels (L5-S1)
where does the ovarian artery travel after it is in the pelvic level?
It moves medially, dividing into an ovarian branch and tubal branches, which supply their respective structures
where does the testicular artery reach?
the scrotum
how does the testicular artery reach the scrotum?
via the inguinal canal
what does the testicular artery travelling within the inguinal canal to reach the scrotum mean?
does not actually enter the pelvis
where does the median sacral artery originate from?
the posterior aspect of abdominal aorta, at its bifurcation into the common iliac arteries
where does the median sacral artery descend?
It descends anteriorly to the L4 and L5 vertebrae, the sacrum and the coccyx, contributing to the arterial supply of these regions
what is the superior rectal artery continuation of?
the terminal continuation of the inferior mesenteric artery
course of travel of superior rectal artery?
It crosses the left common iliac artery and descends in the mesentery of the sigmoid colon
what does the superior rectal artery give rise to?
branches that supply the rectum
