Exam 3 (weeks 5 and 6) Flashcards
(199 cards)
Boundaries of the anterior abdominal wall
Superior: R/L costal margins and the xiphoid process.
inferior: line in either side between ASIS and pubic symphysis
Lateral: lines from the ASIS up
Posterior: lumbar paravertebral musculature
Subcostal plane
Most inferior parts of the costal cartilages (10th costal cartilage) and thru the body of L3
Transtubecular plane
lines through iliac tubercles at L5
Transpyloric plane (AKA)
“Addison’s Plane”
L1
halfway bettered the sternal notch and the pubic symphysis
through the pyloris and tips of the 9th costal cartilages and border of L1
Names of the 9 quadrants
right and left hypochondriac epigastric right and left lumbar umbilical right and left inguinal hypogastric
What two planes divide into 4 quadrants
transumbilical plane and the median plane
list the fascia and tissue in order from superficial to deep
Skin, Campers fascia (fatty fascia), Scarpa’s Fascia (membrenous), EO, IO, TA, Transversalis Fascia (endo-abdominal fascia), extraperitoneal fascia, parietal fascia
what is scarps fascia continuous with
the fascia lata of the thigh
External Oblique OINA and the fibers run…
fibers run medially and inferiorly
O: external surface ribs 5-12
I: linea alba, pubic crest, iliac crest, pubic symphysis
N: inferior 5 t-nerves, subcostal, iliohypogastric
A: flex and rotate the trunk, laterally rotate the trunk and compress the contents
Internal Oblique OINA and the fibers run…
fibers run superiorly and inferiorly
O: thoracolumbar fascia, anterior iliac crest and lateral 1/2 of the inguinal ligament
I: linea alba, pubic crest, inferior surface of ribs T10-12
N: inferior 5 t-nerves, subcostal, iliohypogastric
A: flex and rotate the trunk, laterally rotate the trunk and compress the contents
Transversus Abdominus OINA and the fibers run
fibers run horizontally and medially to the midline
O: thoracolumbar fascia, iliac crest, lateral 1/3 inguinal ligament, internal surfaces of costal cartilages 7-12
I: linea alba, pubic crest and pubic symphysis
N: inferior 5 t-nerves, subcostal, iliohypogastric
A: compress and support the abdominal viscera (and the IST complex)
Rectus abdominus OINA
-is the O+I superior or inferior
the origin is inferior, insertion is superior
O: pubic symphysis and crest
I: xiphoid process and costal cartilages 5-7
N: inferior 5 t-nerves, subcostal, iliohypogastric
A: flex the trunk and tense the abdominal wall
Does the EO or the IO rotate contralaterally or ipsilaterally
The EO rotates contralaterally and the IO rotates ipsilaterally
what gives you a six pack
the tendinous interdigitations of the RA
what supplies most of the anterior abdominal wall (blood)
superior epigastric artery
what is the posterior rectus sheath. what lives here
runs behind, posteriorly to the RA. this is where the superior epigastric artery lives
what happens at the arcuate line
all 3 aponeurosis are anterior to the Ra
the arcuate line is at the level of…
umbilicus
Above vs below the arcuate line
Above:
Anteriorly, all aponeurosis of the EO and 1/2 aponeurosis IO
Posteriorly, 1/2 aponeurosis of the IO and all the TA aponeurosis
Below:
Anteriorly, all three layers of the aponeurosis
posteriorly, thin fascia remains which prevents the RA from rubbing against the abdominal contents
linea alba
where the posterior and anterior walls meet and fuse
what is one of the functions of the abdominal wall
stability of the spine
Describe the abdominal and lateral raphe complex
the abdominal muscles contract and pull on the lateral raphe (because they are attached here). this pulls the multifidus and the erector spinae and will compress the compartment, which will have an amplifying effect on the compression
what is the innervation of the anterior abdominal wall
ventral primary rami of the inferior 5 t-nerves (T6-T11)
subcostal (T12)
iliohypogastric (L1)
ilioinguinal (L1)
What are these landmarks
T10
T7
L1
T10: umbilical
T7: xiphoid
L1: pubic