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Muscles of abdominal wall and ribs

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Muscle
Origin
Insertion
Action
External oblique   R's 5-12   iliac crest, linea alba   compresses abdomen, rotation of vertebral column  
🗑
Internal oblique   iliac crest, inguinal ligament, lumbodorsal fascia   linea alba, xiphoid process, inferior ribs   compresses abdomen, rotation of vertebral column  
🗑
Transversus abdominis   iliac crest, inguinal ligament, lumbodorsal fascia & cartilages of R's 6-12   linea alba, pubis   compressess abdomen  
🗑
External intercostals   inferior border of each rib   superior border of the rib below   elevates rib  
🗑
Internal intercostals   superior border of each rib   inferior border of the rib above   depresses rib  
🗑


   

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Created by: Erinlei
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