MSK 25 - Anterior Abdominal Wall and Inguinal Region

Question 1

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Question 2

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Question 5

What organs are found in each of the 9 abdominal regions?

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Question 6

The superficial fascia of the ______, _______, and _________ are all continuous.

Answer 6

Thorax, abdomen, and perineum

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Question 9

Facts to know about camper’s fascia.

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Question 10

Facts to know about Scarpa’s fascia.

Answer 10

• Deeper and more membranous than camper’s fascia
• Continues from abdomen into the thigh and fuses with the fascia lata
• Attached firmly to linea alba, pubic symphyses, ischiopubic ramus, posterior perineal membrane
• Continues into perineum as Colles’ fascia (superficial perineal fascia)

Question 11

List the muscles of the lateral abdominal wall, their actions, and innervations.

Answer 11

External Oblique - bilateral action is the anterior flexion of the trunk. Unilateral action is lateral trunk flexion and rotation. Innervated by T7-T12

Internal Oblique - bilateral action is the anterior flexion of the trunk, Unilateral action is lateral trunk flexion and rotation. Innervated by T7-T12 and L1

Transverses Abdominus - action is to compress and support abdominal viscera. Innervated by T7-T12 and L1

Question 12

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Question 13

Facts to know about the external obliques.

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Question 16

Facts to know about the internal obliques.

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Question 17

What and where is the arcuate line?

Answer 17

The arcuate line of the abdomen is a horizontal line that demarcates the lower limit of the posterior layer of the rectus sheath. The arcuate line occurs about 1/2 of the distance from the umbilicus to the pubic crest, but this varies from person to person

Question 18

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Question 19

Facts to know about the transverses abdominus

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Question 20

List the muscles of the anterior abdominal wall, their actions, and innervations.

Answer 20

Rectus abdominis - actions are flexion and tense abdominal wall. Innervated by segmental nerves of T7-T12.

Pyramidalis - acts to tense the linea alba. Innervated by T12

Question 21

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Question 25

Between which layers do the nerves of the abdominal wall travel?

Answer 25

Between the internal oblique and transversus abdominis

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Question 28

Facts to know about the rectus sheath

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Question 31

What are the anterior abdominal wall ligaments that are embryonic remnants?

Answer 31

Median ligament Lateral ligament Medial ligament

Question 32

What are the borders of Hesselbach's triangle?

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Question 33

Explain how the abdominal wall muscles and diaphragm can be used in concert.

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Question 35

Describe the location of the following abdominal incisions: median, para-median, pfanneenstiel, McBurney's point, Linea semilunaris, and Kocher.

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Question 37

What are the boundaries of the inguinal canal?

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Question 38

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Question 39

What important structures pass through the inguinal canal in males? Females? Both?

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Question 43

Describe the two types of inguinal hernias and their common causes.

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