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ANA126 > abdominal wall > Flashcards

abdominal wall Flashcards

1
Q

origin and insertion of rectus abdominis

A

o - pubic crest
i - costal cartilage ribs 5-7, xiphoid process

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2
Q

actions of rectus abdominis

A

flexion of lumbar spine
compresses abdominal contents

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3
Q

innervation of rectus abdominis, external oblique, internal oblique, transversus abdominis

A

thoracic spinal nerves

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4
Q

origin and insertion of external oblique

A

o - lower 8 ribs
i - iliac crest and linea alba

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5
Q

actions of external oblique

A

bi - flex lumbar spine
uni- rotation and side flex to same side

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6
Q

origin and insertion of internal oblique

A

o - lumbodorsal fascia, iliac crest, inguinal ligament
i - costal cartilage lower 3 ribs, linea alba

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7
Q

actions of internal oblique

A

bi - flexion of lumbar spine
uni - rotation and side flex

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8
Q

origin and insertion of transversus abdominis

A

o - costal cartilage lower 6 ribs, lumbodorsal fascia, iliac crest, inguinal ligament
i - linea alba

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9
Q

actions of transversus abdominis

A

-increase abdominal pressure
-support back
-decreases waist circumference

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10
Q

what is the fibre direction of the abdominal muscles

A

rectus abdominis - straight up-down
external oblique - downward
internal oblique - upward
transversus abdominis - horizontal

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11
Q

what is the rectus abdominis sheath

A

apeneurosis that belongs to the oblique muscles that surrounds the rectus abdominis muscle

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12
Q

layer arrangement of rectus abdominis sheath above the umbilicus

A

anterior of rectus abdominis muscle - whole layer from external oblique and half layer internal oblique
posterior to rectus abdomins muscle - half layer from internal oblique and whole layer of transversus abdominis

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13
Q

layer arrangement of rectus sheath below the umbilicus

A

anterior to rectus abdominis muscle - whole layer from external oblique, internal oblique, and transversus abdominis
posterior to rectus abdominis muscle - none

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14
Q

why is there no rectus abdominis sheath posterior to the muscles below the umbilicus

A

need blood supply to get to organs

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15
Q

what is the inguinal ligament formed by and where does it attach

A

-formed by free edge of oblique and transversus fascia rolling up
-attaches to pubic tubercle and superior iliac spine

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16
Q

what is the inguinal canal formed by

A

roll up of inguinal ligament

17
Q

what is contained in the inguinal canal

A

men - spermatic cord
women - round ligament

ANA126 (40 decks)

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