Posterior Abdominal Wall and Pelvic Cavity Flashcards
Nerve to Transversus Abdominis
Iliohypogastric
Nerve to Quadratus Lumborum
Ventral Rami of T12-L4
Nerve to Psoas Major
Lumbar Plexus L1-L3
Nerve to Iliacus
Femoral
Nerve that runs on ANT surface of QL
T12/Subcostal
Name the two nerves that arise from L1 Nerve
Iliohypogastric (larger) & Ilioinguinal
Nerve associated with Meralgia paresthetica?
Lateral Femoral Cutaneous Nerve (L2-L3)
Name the two nerves that arise from Genitofemoral Nerve?
Genital branch (passes through inguinal ring) & Femoral branch (passes under inguinal ring)
Destination of genital branch of genitofemoral nerve?
Males= cremaster m.
Females= skin of mons, labia majora
Name the two nerves arising from L2-L4
Obturator N. and Femoral N.
True pelvis is…
below the pelvic brim/inlet
True pelvis wall muscles
Obturator internus (covered by obturator fascia) & Piriformis
Obturator fascia creates what line
Arcus tendineus (gives rise to levator ani)
Other names for pelvic floor
Pelvic diaphragm and levator ani
Innervation of Levator ani
Pudendal Plexus (S3, sometimes S3&5)
Levator ani is subdivided into what muscles
Pubococcygeus, puborectalis, iliococcygeus, and pubovaginalis in females
Pelvic diaphragm components
Levator ani & coccygeus
Common iliac artery bifurcates into internal and external iliac arteries, Internal iliac artery bifurcates into anterior and posterior trunks. What are the branches off posterior iliac A.?
Iliolumbar (further divides to lumbar branches, psoas and QL branches and iliac branches), Lateral sacral (branches enter sacral foramina to vertebral canal), Superior gluteal (terminal branch leaving via greater sciatic foramen to piriformis, obturator internus and all gluteal muscles)
The anterior trunk of internal iliac artery branches into…
Obturator, umbilical (sup and middle vesical to bladder), uterine, vaginal, inferior vesical, middle rectal, internal pudendal and inferior gluteal arteries
What are the two terminating branches of the anterior trunk of internal iliac artery?
Internal pudendal and Inferior gluteal (larger of the two)
Venous return of internal iliac
iliolumbar veins participate in formation of ascending lumbar veins, to azygos (right) or hemiazygos (left), to IVC
Cruciate anastomosis of lower extremities include…
Inferior gluteal a., 1st perforating branch, lateral and medial femoral circumflex a.