Anterior Abdominal Wall

Question 1

what type of structures are abdominal wall layers?

Answer 1

somatic structures

Question 2

abdominal wall layers are innervated with…

Answer 2

somatic sensory and motor

Question 3

superficial to deep layers of abdominal wall

Answer 3

skin
Camper’s fascia (fatty SF)
Scarpas’s fascia (membranous SF)
3 layers of muscle (external, internal transversus)
transversalis fascia
extraperitoneal fat
parietal peritoneum

Question 4

Camper’s fascia

Answer 4

-abdominal fat stored here
-loose irregular CT w/ adipocytes
-variable

Question 5

Scarpa’s fascia

Answer 5

VERY thin

Question 6

layers of muscle in abdominal wall

Answer 6

-skeletal
-broad, flat sheets

Question 7

transversalis fascia

Answer 7

just CT

Question 8

extraperitoneal fat

Answer 8

usually pretty thin

Question 9

parietal peritoneum

Answer 9

transparent serous membrane secretes & lubricates with fluid

Question 10

what structure is this?

Answer 10

linea alba

Question 11

what structure is this?

Answer 11

skin

Question 12

what structure is this?

Answer 12

superficial fascia fatty layer
(Camper’s fascia)

Question 13

what structure is this?

Answer 13

superficial fascia membranous layer
(Scarpa’s fascia)

Question 14

what structure is this?

Answer 14

parietal peritoneum

Question 15

what structure is this?

Answer 15

extraperitoneal fascia

Question 16

what structure is this?

Answer 16

transversalis fascia

Question 17

what structure is this?

Answer 17

transversus abdominis muscle

Question 18

what structure is this?

Answer 18

internal oblique muscle

Question 19

what structure is this?

Answer 19

external oblique muscle

Question 20

rectus abdominis muscle

Answer 20

-located at very front of abdominal wall on R & L side
-fibers run vertically
-about 3x as wide superiorly as inferiorly
-have 4 tendinous insertions into the superficial division of the rectus sheath (makes muscle more efficient)

Question 21

rectus abdominis muscle (O, I, A)

Answer 21

O: pubis
I: costal cartilages and xiphoid process
A: pulls rib cage down towards pubis flexion of trunk

Question 22

external oblique muscle (O, I, A)

Answer 22

O: ribs
I: xiphoid process down to pubic symphysis

*fibers run down & in

Question 23

aponeurosis

Answer 23

sheet-like tendon made of dense regular CT; extension of the muscle

Question 24

inguinal ligament

Answer 24

strong band of CT
*external band of aponeurosis

Question 25

internal abdominal oblique muscle

Answer 25

fan shaped
aponeurosis insertion: xiphoid process to pubic symphysis

Question 26

transversus abdominis muscle (O & I)

Answer 26

O: CT in back (thoracolumbar fascia) & inguinal ligament
I: xiphoid process to pubic symphysis (through aponeurosis)