Abdominal Wall (lec 7)

Question 1

Common functions of the abdominal wall muscles

Answer 1

• Bilateral: flexion of spine
• Compression of
  abdominal organs
• Forced expiration

Question 2

the anterior abdominal wall muscles converge into _?

Answer 2

linea alba

Question 3

number of layers of muscles on the abdominal wall

Answer 3

3

Question 4

origin of the external oblique

Answer 4

outer surface of ribs 5-12

Question 5

insertion of the external oblique

Answer 5

linea alba, pelvis (pubic tubercle, iliac crest)

Question 6

fiber orientation of the external oblique (dotted arrows)

Answer 6

sup./post. to inf./ant.

Question 7

additional functions of the external oblique

Answer 7

ipsilateral trunk flexion, some
contralateral trunk rotation

Question 8

origin of the internal oblique

Answer 8

thoracolumbar fascia, iliac crest, anterior
superior iliac spine

Question 9

insertion of the intrernal oblique

Answer 9

inferior border of ribs 10-12, xiphoid, linea
alba, pelvis (pubic tubercle, iliac crest

Question 10

fiber orientation of the internal oblique

Answer 10

variable, superior
half at right angles to external oblique.

Question 11

additional functions of the internal oblique

Answer 11

ipsilateral trunk flexion,
ipsilateral trunk rotation

Question 12

origin of the tranversus abdominis

Answer 12

thoracolumbar fascia, iliac
crest, inner cartilage of T6-T12

Question 13

insertion of the tranversus abdominis

Answer 13

linea alba, pubic crest

Question 14

fiber orientation of the transversus abdominis

Answer 14

transverse, horizontal

Question 15

additional function of the transversus abdominis

Answer 15

none? But esp.
important for compressing abdominal
contents (defecation/micturition, and
during birth)

Question 16

origin of the rectus abdominis (abs)

Answer 16

Ribs 5-7, and xiphoid

Question 17

insertion of the rectus abdominis

Answer 17

pubic crest and symphysis

Question 18

fiber orientation of the rectus abdominis

Answer 18

superior-inferior (vertical)

Question 19

number of tendinous insertions (abs)

Answer 19

3 (occ.4)

Question 20

funciton of the rectus abdominis

Answer 20

compression of abdominal
contents and trunk flexion

Question 21

what’s happen when there’s no more aponeurosis against viscera

Answer 21

area of wickness

Question 22

linea semilunaris

Answer 22

convergence of
oblique/transversus aponeuroses
on rectus abdominis

Question 23

what’s create the six-pack

Answer 23

Tendinous intersections of rectus
abdominis

Question 24

innervation of the abdominal wall

Answer 24

anterior rami T7-L1

Question 25

function of the muscles of posterior abdominal wall

Answer 25

• Primary function at the lower limb
• Assists in
  lumbar flexion
• Bilateral function – extension of lumbar spine
• Unilateral function – lateral flexion (ipsilateral)

Question 26

function of the