2 - muscles of anterior abdominal wall

Question 1

name 4 muscles of ant abdomen wall?

Answer 1

external oblique
internal oblique
transversus abdominis
rectus abdominis

Question 2

action of the external obliques?

Answer 2

flex and rotate trunk

Question 3

action of the internal obliques?

Answer 3

flex and rotate trunk

Question 4

action of the transversus abdominis?

Answer 4

compress + support abdominal viscera

Question 5

action of the rectus abdominis?

Answer 5

flex trunk

stabilize and control tilt of the pelvis

Question 6

innervation of the external obliques?

Answer 6

anterior rami T7-11 nerves

subcostal n

Question 7

innervation of the internal obliques?

Answer 7

anterior rami T7-11 nerves
subcostal n
1st lumbar nerve

Question 8

innervation of the transversus abdominis?

Answer 8

anterior rami T7-11 nerves
subcostal n
1st lumbar nerve

Question 9

innervation of the rectus abdominis?

Answer 9

subcostal n

anterior rami T7-12 spinal n

Question 10

which muscles appear to be straight vertical composition and lies anterior to other muscles?

Answer 10

rectus abdominis

Question 11

which muscles appear to go diagonally up the way from the midline?

Answer 11

transversus abdominis

Question 12

what is the white covering that lie on top of the muscles?

Answer 12

rectus sheath

Question 13

what is the rectus sheath?

Answer 13

formed by aponeuroses of transverse abdominis, external and internal obliques

Question 14

what is aponeurosis?

Answer 14

sheet of white fibrous tissue

Question 15

how does sheath work above the umbilicus?

Answer 15

goes around (i.e. above and below) muscles

Question 16

how does sheath work below the umbilicus?

Answer 16

only goes above the muscles

Question 17

vertebral level of umbilicus?

Answer 17

L3/4

Question 18

dermatome of umbilicus?

Answer 18

T10

Question 19

which throacic spinal segments innervate the anterior abdominal wall?

Answer 19

T7-12