Week 5

Question 1

Obliquus Externus Abdominis

Answer 1

O: external surfaces of lower 8th ribs
I: linea alba
- pubic tubercle
- anterior half of iliac crest
Function:
- flex the trunk
- contralateral rotation of the trunk
- compresses the abdominal contents
Intercostal nerves (T7-T12)

Question 2

Obliquus internus abdominis

Answer 2

O:
- lateral 1/3 of inguinal ligament
- anterior 2/3 of iliac crest
- thoracolumbar fascia
I: linea alba and lower 3 ribs
Function:
- flexion of trunk
- ipslateral rotation of trunk
- compresses the abdominal contents
Intercostal nerves T6-L1

Question 3

Transversus abdominis muscle

Answer 3

O:
- inguinal ligament
- iliac crest
- thoracolumbar fascia
- cartilages of the lower 6 ribs
I:
- linea alba
Function: compresses the abdominal contents
Intercostal nerves T6-L1

Question 4

Rectus Abdominis

Answer 4

O: pubic crest and symphysis pubis
I: xiphoid process and cartilages of ribs 5-7
Function:
1. flexion of trunk
2. posterior tilt of pelvis
3. Compresses the abdominal contents
Intercostal nerves (T6-T12)

Question 5

Layers of the abdominal wall

Answer 5

1. skin
2. camper’s fascia
3. scarpa’s fascia
4. rectus sheath
5. transversalis fascia
6. extraperitoneal fat
7. parietal peritoneum

Question 6

camper’s fascia

Answer 6

fatty layer
- thick superficial layer of adipose and areolar connective tissue
- more prominent under the belly button

Question 7

scarpa’s fascia

Answer 7

deep membranous layer

Question 8

rectus sheath

Answer 8

protective covering over rectus abdominus and composed of 3 flat muscles: external oblique, internal oblique, and transversus abdominus

Question 9

arcuate line

Answer 9

located 1/2 of the distance between umbilicus and pubic symphysis

Question 10

difference between the rectus sheath superior to the arcuate line and inferior

Answer 10

superior - the anterior lamina is full aponeurosis of external oblique and anterior half of the aponeurosis of the internal oblique
the posterior lamina is the posterior half of the aponeuroses of the internal oblique and full aponeurosis of transversus abdominis

Inferior - the anterior lamina - aponeurosis of all 3 abdominal muscles
there is no posterior layer

Question 11

Layers of the anterolateral abdominal wall

Answer 11

1. skin
2. camper’s fascia
3. scarpa’s fascia
4. external oblique muscle
5. internal oblique muscle
6. transversus abdominis muscle
7. transversalis fascia
8. extraperitoneal fat
9. parietal layer of peritoneum

Question 12

Quadratus Lumborum

Answer 12

O: iliac crest and iliolumbar ligament
I: Rib 12 and TPs of L1-L4
function:
- extension of trunk
- lateral flexor of trunk
- fixes rib 12 during inspiration
ventral rami of spinal nerves T12 and L1-4

Question 13

Psoas Major

Answer 13

O: bodies and TPS of L1-L5
I: lesser trochanter of femur
function:
- flexion of thigh
- lateral rotation of thigh
- flexion of trunk
- lateral flexion of trunk
Lumbar plexus (L1.L2,L3)

Question 14

Iliacus

Answer 14

O: iliac fossa and sacral ala
I: lesser trochanter of femur
function: flexion of thigh and lateral rotation of thigh
femoral nerve

Question 15

inguinal canal

Answer 15

oblique canal downward and medial ward on top of the inguinal ligament
- contains the spermatic cord

Question 16

superficial inguinal ring

Answer 16

a triangular gap in the external oblique aponeurosis

Question 17

deep inguinal ring

Answer 17

oval shape opening in the fascia transversalis

Question 18

conjoint tendon

Answer 18

formed by the fusion of the lowest aponeurotic fibers of the internal oblique and of the transversus abdominis muscles

Question 19

what are the 2 skeletal system?

Answer 19

axial and appendicular skeleton

Question 20

how many bones in the axial skeleton

Answer 20

80 bones

Question 21

how many bones in the appendicular skeleton

Answer 21

126 bones

Question 22

define the axial skeleton

Answer 22

lies along the longitudinal axis

Question 23

define the appendicular skeleton

Answer 23

upper and lower limbs and pelvic and pectoral girdles