wednesday muscles (muscles of the abdominal wall)

Question 1

origin of the external oblique (1)

Answer 1

external inferior border of lower ribs

Question 2

insertion of external obliques (2)

Answer 2

linea alba, iliac crest

Question 3

action of external oblique

Answer 3

both contract:
compress abdomen and flex vertebral column
one contracts: lateral rotation

Question 4

what is the inguinal ligament

Answer 4

spans distance between body of pubis and anterior superior iliac spine

Question 5

origin of the internal obliques (3)

Answer 5

iliac crest, lumbar facia, inguinal ligament

Question 6

insertion of the internal oblique (3)

Answer 6

linea alba, lower ribs and costal cartilage of ribs 8-10

Question 7

action of internal obliques

Answer 7

synergistic with external obliques (flex vertebral column and laterally rotates trunk)

Question 8

origin of transverse abdominis (5)

Answer 8

iliac crest, lumbar facia, costal cartilage of lower ribs, inguinal ligament

Question 9

insertion of transverse abdominis (2)

Answer 9

linea alba and pubic crest

Question 10

action of transverse abdominis

Answer 10

compresses abdomen

Question 11

origin of rectus abdominis (1)

Answer 11

pubic symphysis

Question 12

insertion of rectus abdominis (2)

Answer 12

xiphoid and inferior surface of ribs

Question 13

action of rectus abdominis

Answer 13

flexes vertebral column and compresses abdomen

Question 14

what is the linea alba

Answer 14

a thin band of connective tissue that runs down the front of the abdomen, separates the left and right sides of rectus abdominis

Question 15

the thing that runs down the abdomen and separates the L and R sides of rectus abdominis

Answer 15

linea alba

Question 16

what is the linea semilunaris

Answer 16

the vertical, curved structure that runs along the lateral edges of the rectus abdominis muscle. (outside of the abs)

Question 17

the vertical, curved structure that runs along the lateral edge of the rectus abdominis, the ‘outside border’ of the abs

Answer 17

linea semilunaris

Question 18

what is the rectus sheath

Answer 18

the fibrous compartment that contains the rectus abdominis muscle and the pyramidalis muscle

Question 19

the fibrous compartment that contains the rectus abdominis muscle and the pyramidalis muscle

Answer 19

the rectus sheath

Question 20

tendinous intersections

Answer 20

the ab dividers but lengthwise