GI - Class 1 Flashcards
What are the two imaginary lines used to divide the abdomen in 4 quadrants?
Transumbilical plane
Median plane
What are the imaginary lines used to divide the abdomen into 9 regions?
Two horizontal:
subcostal plane and trans tubercular plane
Two vertical:
right and left midclavicular planes
Name a few organs in the right hypochondriac
Liver, gallbladder, right kidney
Name a few organs in the epigastric
stomach, pancreas, duodenum
Name a few organs in the left hypochondriac
spleen, left kidney, pancreas
Name a few organs in the right lumbar
liver, ascending colon, gallbladder
Name a few organs in the umbilical
umbilicus, small intestine, duodenum
Name a few organs in the left lumbar
descending colon, left kidney
Name a few organs in the right iliac
appendix, caecum
Name a few organs in the hypogastric region
urinary bladder, sigmoid colon, female reproductive organs
Name a few organs in the left iliac
descending colon, sigmoid colon
What are the five bilaterally paired muscles in the anterolateral abdominal wall?
3 flat muscles: external oblique, internal oblique and transversus abdominis
2 vertical muscles: rectus abdominis and pyramidalis
What is the action and innervation of the external oblique muscle?
compresses and supports abdominal viscera, flex and rotate trunk.
innervate by thoraco-abdominal nerves (anterior rami of T7-T11)
subcostal nerve
What is the action and innervation of the internal oblique muscle?
compresses and supports abdominal viscera, flex and rotate trunk.
innervate by thoraco-abdominal nerves (anterior rami of T7-T11)
subcostal nerve
first lumbar nerve
What is the action and innervation of the transversus abdominis muscle?
compresses and supports abdominal viscera.
innervate by thoraco-abdominal nerves (anterior rami of T7-T11)
subcostal nerve
first lumbar nerve
What is the action and innervation of the rectus abdominis muscle?
flexes trunk (lumbar vertebrae) compresses abdominal viscera, stabilises and controls tilt of pelvis(antilordosis) innervate by thoraco-abdominal nerves (anterior rami of T7-T11) subcostal nerve
What is the rectus sheath?
formed by the interlaced aponeurosis of the flat abdominal muscles enclosed in the rectus abdominis and the pyramidalis.
What is the arcuate line?
demarcates the transition between the posterior rectus sheath covering the superior three quarters of the rectus abdominis proximally and the transversalis fascia covering the inferior quarter.