Origin, Insertion, Action

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Muscle

Origin

Insertion

Action

External Intercostals

OUTER surface of Ribs

Inferior Rib

ELEVATES the Ribs

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Internal Intercostals

INNER surface of INFERIOR Ribs & Costal Cartilage

SUPERIOR Rib & Costal Cartilage

DEPRESSES the Ribs

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External Abdominal Oblique

LOWER 8 Ribs

Linea Alba, Iliac Crest

COMPRESSES Abdomen; FLEXES, ROTATES Vertebral Column

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Internal Abdominal Oblique

Iliac Crest, Lumbodorsal Fascia

Linea Alba, LOWER Ribs

COMPRESSES Abdomen; FLEXES, ROTATES Vertebral Column

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Rectus Abdominis

Pubis

Costal Cartilages, Xiphoid Process

COMPRESSES Abdomen; FLEXES Vertebral Column

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Transverse Abdominis

Iliac Crest, LOWER Costal Cartilages

Linea Alba

COMPRESSES Abdomen

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Erector Spinae Group

Iliac Crest/Ribs, Vertebrae INFERIOR to Insertion

Ribs, Vertebrae SUPERIOR to origin --> Mastoid Process - Temporal

EXTENDS Vertebral Column, Head

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Created by: kristel387