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Muscles of Body
Origin, Insertion, Action
| Muscle | Origin | Insertion | Action |
|---|---|---|---|
| External Intercostals | OUTER surface of Ribs | Inferior Rib | ELEVATES the Ribs |
| Internal Intercostals | INNER surface of INFERIOR Ribs & Costal Cartilage | SUPERIOR Rib & Costal Cartilage | DEPRESSES the Ribs |
| External Abdominal Oblique | LOWER 8 Ribs | Linea Alba, Iliac Crest | COMPRESSES Abdomen; FLEXES, ROTATES Vertebral Column |
| Internal Abdominal Oblique | Iliac Crest, Lumbodorsal Fascia | Linea Alba, LOWER Ribs | COMPRESSES Abdomen; FLEXES, ROTATES Vertebral Column |
| Rectus Abdominis | Pubis | Costal Cartilages, Xiphoid Process | COMPRESSES Abdomen; FLEXES Vertebral Column |
| Transverse Abdominis | Iliac Crest, LOWER Costal Cartilages | Linea Alba | COMPRESSES Abdomen |
| Erector Spinae Group | Iliac Crest/Ribs, Vertebrae INFERIOR to Insertion | Ribs, Vertebrae SUPERIOR to origin --> Mastoid Process - Temporal | EXTENDS Vertebral Column, Head |