Jan29 M3-Anatomy Lecture 1 Flashcards
extraperitoneal fatty tissue location
between peritoneum and transversalis fascia
7 layers of the anterior abdomen
skin, superficial fascia, deep fascia, anterolateral wall muscles, transversalis fascia, extraperitoneal fatty tissue, peritoneum
superficial fascia components
Camper’s fascia (superficial fatty)
Scarpa’s fascia
(deep membranous)
deep fascia def
fascia coating/covering every muscle in the body
external oblique runs in what direction
hands in pockets.
starts on rib cage.
external oblique: 2 target places where it joins in the bottom
- inguinal ligament (free lower edge), connected to legs fascia
- anterior superior iliac spine (ASIS)
external oblique: midline extensions + name
beyond midclavicular line, going to midline is only deep fascia. aponeurosis
pubic tubercle location
bottom of linea alba (midline)
where 2 bands of external oblique fascia end up going
extend to pubic tubercle
bump on the hip: what it corresponds to
anterior superior iliac spine
internal oblique muscle limited to where and extensions
muscle doesn’t go medially under the ribs (between the costal margins (infrasternal angle)) and is mostly on the side
still aponeurosis
transversus abdominis direction and fascia
horizontal. fascia extending to midline
rectus abdominis covers name and origin
rectus sheath: formed by fascias of external oblique, internal oblique and transversalis abdominis
rectus abdominis origin and insertion and direction
starts on costal cartilage of costal margin. goes down to pubic crest (near pubic tubercles and pubic symphysis)
how many pubic tubercles and pubic crests and where
- inguinal ligament extends to pubic tubercle
- pubic crest is from pubic tubercle to midline
3 non muscular delineations of the rectus abdominis
- linea alba (middle forward extension of sheaths)
- linea semilunaris (sides)
- tendinous intersections
tendinous intersections attach to what structure anteriorly
rectus sheath
composition of the rectus sheath right below the xiphoid process (at costal margin level)
deep fascia of EO (external oblique) goes on top of rectus abdominis and makes anterior rectus sheath
rectus sheath composition in the middle of the abdomen
anterior: EO + half IO deep fascia
posterior: half of IO, TA, transversalis fascia (TF)
lower sheath (low abdomen) composition
anterior: EO + all IO + TA (transversus abdominis)
posterior: TF (transversalis fascia)
vessels feeding the rectus abdominis: location in relation to rectus sheath
between rectus abdominis and posterior rectus sheath
arcuate line def
(lower edge of posterior rectus sheath) transition line below umbilicus where no more posterior rectus sheath
below arcuate line, what is posterior to rectus abdominis
transversalis fascia
blood supply to the rectus abdominis
- superior epigastric arteries (from internal thoracic arteries)
- inferior epigastric arteries (from external iliac artery)
branchings after abdominal aorta
2 common iliacs. each gives external iliac (becomes femoral artery in the leg) and internal iliac (to the pelvis)