Anterior Abdominal Wall Flashcards
Boundaries of the abdominal wall
Superior- right, and left costal margins, xiphisternal joint
Inferior- a line on either side, connecting that ASIS to the pubic symphysis
Lateral- vertical lines, ascending from the ASIS on each side
Posterior- lumbar paravertebral musculature
How was the abdomen divided?
Four planes and nine regions
Subcostal plane
Line through the most inferior points of the coastal cartilage, 10th coastal cartilage
the line passes through the body of L3 vertebrae
Transtubercular plane
Line passes through the iliac tubercles at the level of the L5 vertebrae
Sagittal plane
Clavicular lines extends inferior from the mid clavicle to the mid inguinal point
Transpyloric plane
Addisons plane
Imaginary horizontal plane located halfway between the suprasternal notch of the manubrium and the upper border of the pubic symphysis
Usually cuts through the pylorus of the stomach and the tips of the costal cartilages and the lower border of L5 vertebrae
It lies, roughly a hands breath between the sternum for midway between the zippy sternum and the umbilicus
Transpyloric plane transects…
Fundus of the gallbladder
Neck of the pancreas
Origins of the superior mesenteric artery
Hepatic portal vein
Root of a transverse Mesocolon
Duodenal Jejunum Junction
Highlight of the kidneys
Upper region
R hypochondriac
Epigastric
L hypochondriac
Middle region
R lumbar
Umbilical
L lumbar
Lower region
R inguinal
Hypogastric
L inguinal
Transumbilical plane
Left to right
Makes 4 quadrants with median plane
Median plane
Superior to inferior
Making 4 quadrants with transumbilical plane
Right upper quadrant
Liver
Gallbladder
Right suprarenal gland
Right kidney
Ascending colon superior part
Left upper quadrant
Spleen
Stomach
Pancreas body and tail
Left kidney
Transverse colon left half
Descending colon superior part
Right lower quadrant
Cecum
Vermiform appendix
Right ovary
Right ureter
Most of ileum
Left lower quadrant
Sigmoid colon
Descending colon inferior part
Left ovary
Left ureter
Left spermatic cord
External abdominal oblique
O- external surface of the 5th to 12th ribs
I- linea alba, pubic crest, iliac crest, pubic symphysis
N-inferior, five thoracic nerves and subcostal nerve T12 and iliohypogastric nerve
A- flex and rotate trunk, laterally rotate the trunk compress abdominal contents
Fibers travel medially and inferiorly
Internal abdominal oblique
O- thoracolumbar fascia anterior iliac crest lateral half of inguinal ligament
I- linea alba pubic crest ribs 10 to 12 inferior surface .
N- lower five thoracic nerves, subcostal, iliohypogastric nerve
A- flex and rotate the trunk, laterally rotate the trunk compress abdominal contents
Fibers run medially and superiorly
Transversus abdominis
O- thoracolumbar fascia (lateral Raphae), iliac crest, lateral 1/3 of the inguinal ligament, internal surface of the coastal cartilage is seven to 12
I- linea alba pubic crest pubic synthesis
N- lower, five thoracic nerves, subcostal, and Illiohypogastric nerves
A- compress and support abdominal viscera
(Pull on lateral raphae and cinch down or tighten up two layers of thoracolumbar fascia to compress the spinal muscles and provide this hydraulic amplifier effect)
Rectus abdominis
O- pubic symphysis pubis crest
I- xiphoid process fifth and seventh costal cartilages
N- lower, five thoracic nerves, subcostal, and Illiohypogastric nerves
A- flexes trunk and tenses anterior abdominal wall
Rectus sheath
Dense, fibrous sheath enclosing the rectus abdominous muscle
Formed by fusion of aponeuroses of the abdominal muscles
Rectus sheath Above the level of the umbilicus
Anteriorly- external abdominal oblique aponeurosis, and half of internal abdominal oblique aponeurosis
Posteriorly - half of internal abdominal oblique I’m gonna roses and aponeurosis of transversus abdominis
The anterior and posterior walls meet and fuse in the anterior median line called the linea alba
Rectus sheath Below the level of the umbilicus
Anteriorly- aponeuroses of all three muscles now passing anteriorly over the rectus abdominous with no facia from the muscles passing posteriorly
Posteriorly - thin, fascial film remains posteriorly that protects the rectus abdominous from rubbing against the abdominal contents
The point of transition were all three upper neuroses pass entirely, is marked by the arcuate line
Innervation of the anterior abdominal wall
Ventral primary rami of thoracic spinal nerves of T6 to T11
Ventral primary ramus of T12 subcostal nerve
Illiohypogastric and Ilioinguinal nerves from ventral primary ramus of L1