Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Anterolateral Abdominal Wall Muscles (Ex. III) Flashcards Preview

Gross Anatomy '15 Ex. III > Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Anterolateral Abdominal Wall Muscles (Ex. III) > Flashcards

Flashcards in Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Anterolateral Abdominal Wall Muscles (Ex. III) Deck (3)
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1

internal oblique

O: deep layer of thoracolumbar fascia; intermediate line of iliac crest; ASIS; iliopsoas fascia
I: lower borders of ribs 10-12; A and P layers of linea alba
Inn: intercostal nn. (T7-T12); iliohypogastric n.; ilioinguinal n.
A: ipsilaterally laterally flexes trunk and contralaterally rotates; bilaterally flexes trunk, compresses abdomen, and stabilizes pelvis

2

transversus abdominis

O: inner surfaces of costal cartilages of ribs 7-12; deep layer of thoracolumbar fascia; iliac crest; inner lip of ASIS; iliopsoas fascia
I: linea alba; pubic crest
Inn: intercostal nn. (T7-T12); iliohypogastric n.; ilioinguinal n.
A: ipsilaterally rotates trunk; bilaterally compresses abdomen

3

external oblique

O: outer surface of ribs 5-12
I: linea alba; pubic tubercle; A iliac crest
Inn: intercostal nn. (T7-T12)
A: ipsilaterally laterally flexes trunk and contralaterally rotates; bilaterally flexes trunk, compresses abdomen, and stabilizes pelvis

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