Arteries and innervation of anterior abdominal wall Flashcards
Superior Epigastric A
anastomoses with Inferior epigastric a. in rectus abdominis muscle
branches from internal thoracic
deep arterial supply
Inferior Epigastric A
branches from external iliac a
anastomoses with superior epigastric a. in rectus abominis m
deep arterial supply
Musculophrenic A
arises from internal thoracic a, runs along costal margin
deep branch
posterior intercostal a 10-11 and subcostal a
arise from thoracic aorta, lie between transversus abdominis and internal oblique
enter rectus sheath to anastomose with epigastric arteries
Lumbar arteries
abdominal counterparts to intercostal
four on each side L1-L4
deep branch
Deep Circumflex A.
arises from external iliac a.
anastomoses with lower intercostal a.s by ascending branch
deep branch
superficial circumflex iliac a.
arise from femoral a., run in superficial fascia
superficial epigastric a
goes to umbilical region
arises from femoral a
runs in superficial fascia
external pudendal a
goes to suprapubic, pubic, and genital regions
arises from femoral a
superficial blood supply
superficial drainage of of skin and subcutaneous tissue, general of superior region
drain superiorly to axillary vein via thoracic and thoracoepigastric veins
caput medusa
distended paraumbilical veins inside camper’s fatty tissue
superficial drainage of of skin and subcutaneous tissue, general of inferior region
drains inferiorly to femoral v through tributaries
deep draining of muscular wall
tributaries of subclavian
tributaries of IVC
tributaries of external iliac
tributaries of azygous
subclavian receive:
musculophrenic and superior epigastric v
IVC receives
lumbar veins
external iliac receives
inferior epigastric
deep circumflex iliac
azygous system
posterior intercostal and subcostal
Sensory dermatomes
T7-T11
arise from intercostal n
Sensory dermatomes
T12
subcostal n
Sensory dermatomes
L1-L4
originate from lumbar plexus
Thoracoabdominal intercostal nerves arise from ____ vertebra
T7-T12
Thoracoabdominal intercostal nerves
innvervates rectus abdominis
supplies skin, muscles, and parietal peritoneum
branch to form lateral cutaenous branches
arise at about anterior axillary line
pierce abdominal muscles to reach dermis
L1-L4
lumbar ns
T12
subcostal n
T7-T11
intercostal ns
T7 is ___regions
xiphoid region
T10 is ____region
umbilical region
L1 is ____ region
inguinal fold region
where in general do anterior abdominal wall muscles lie?
between abdominal internal oblique and transversus abdominis
they pierce rectus sheath to innervate rectus abdominis muscles
what in general do anterior abdominal wall muscles innervate?
rectus muscle, skin, and PARIETAL PERITONEUM
L1 and L2 are part of the
lumbar plexus
Iliohypogastric n
L1
sometimes involves T12
ilioinguinal n.
L1
genitofemoral n. L1 and L2
genitofemoral n.
L1 and L@
iliohypograstric n
L1 and sometimes T12
exits posterior abdominal wall between quadratus lumborum and psoas m.
enters abdominal wall and runs between muscles- exits to become cutaneous
LATERAL cutaneous branch
ANTERIOR cutaneous branch (supplies suprapubic region)
ilioinguinal n
L1
exists posterior abdominal wall between quadratus lumborum and posas m.
enters inguinal canal. emerges through superifical inguinal ring
supplies groin, thigh, scrotum/labium major
Genitofemoral nerve
L1 and L2
Exits posterior wall THROUGH psoas m.
runs between psoas and peritoneum
Genital branch of genitofemoral nerve
externs inguinal canal through the deep inguinal ring and exists the inguinal canal through the superifical inguinal ring
innervates cremaster muscle or is cutaneous to the labium majus
femoral n.
exits inferior to the inguinal ligament
cutaneous to the femoral triangle area
Iliohypogastric n: pierces what muscle, runs between what two muscles, sends a branch where, communicates with whom, and terminates where
what major cord does it run down?
pierces internal oblique and superior to the ASIS
runs between IO and EO muscles
sends a lateral branch to the skin of the gluteal region
innervates anterolateral abdominal muscles
communicates with iliioinguinal n.
runs on surface of spermatic cord or round ligament of uterus
emerges through superficial inguinal ring
terminates as anterior cutaneous branches to hypogastric (suprapubic regions)
Ilioinguinal n
runs on the surface of what cord
emerges where
supplies innervation to what structures
surface of spermatic cord or round ligament of uterus
emerges from superficial inguinal ring
supplies skin of groin and scrotum/labium majus
genitofemoral n.
L1/L2
exits intervertebral forament and runs through the psoas m.
divides into genital branch and femoral branch either within the muscle or after emerging from the muscle
genital branch runs through
deep inguinal ring, passes through inguinal canal and emerges through the superficial ring
genital branch supplies innervation to whom
to cremaster m. and skin of scrotum in men
genital branch supplies the skin of the labia majora in females
femoral branch of the genitofemoral nerves exits what
innervates what
the abdomen inferior to the inguinal ligament, sometimes through the femoral seath
femoral branch supplies the skin of the thigh over the femoral triangle
umbilical hernia: in infants
involves umbilicus
scar of umbilicus does not heal over completely
usually heals on its own spontaneously
small and wider transversely
umbilical hernia: in adults
results from weakened abdominal wall around umbilicus
more common in women
requires surgical repair
usually superior to umbilical scar
