Abdominal Wall and Cavity Flashcards
What is the inferior border of the abdominal cavity?
the pelvic outlet
What is the superior border of the abdominal cavity?
the diaphragm
The inguinal ligament connects what two structures?
the anterior superior iliac spine and the pubic tubercule
What is the iliac crest?
the superolateral margin of the greater pelvis
What is the lower segment of the sterum called?
the xiphoid process
What is the linea alba?
a fibrous structure that runs down the midline of the abdominal wall
What is the semilunar line?
a tendenous intersection on either side of the rectus abdominis
What vertebral level does the transumbilical plane lie at?
a horizontal plane between the level of L3/L4
At what vertebral level is the umbilicus?
L3/L4
The abdomen is divided into four quadrants by what two planes?
the median plane and transumbilical planes create what clinical tool?
The abdomen can be divided into 9 regions using what vertical planes?
either the semilunar lines or midclavicular planes
What two horizontal lines can be used to divide the abdomen into 9 regions?
transpyloric plane with transtubercular plane
The interspinous plane intersects what structure?
the anterior superior iliac spine
Where is the transtubercular plane?
line that passes through the iliac tubercles
The transpyloric plane sits at what vertebral level?
L1
The semilunar line serves as the lateral border to what muscle group?
the rectus abdominus muscle
The lateral abdominal wall has what three muscle layers?
- external oblique
- internal oblique
- transversus abdominus
The superficial fascia that lies on the abdominal wall can be divided into what two portions?
- Camper (fat)
- Scarpa (membranous)
Where is Scarpa’s fascia found?
halfway between the umbilicus and pubic crest and down
The external oblique muscles originate from where?
the external surfaces of ribs 5-12
Which lateral abdominal wall muscles run superior-lateral to inferior-medial?
the external oblique muscle
The rectus abdominis sheath is formed by what structures?
the aponeurosis of the lateral wall muscles
The inguinal ligament is formed by what?
the inferior edge of the external oblique muscle aponeurosis
The internal oblique muscle runs in which direction?
- inferior-lateral to superior-medial in the superior region
- almost perfectly lateral-medial in the middle and inferior region