Muscles of the Back and Trunk

  1. Muscle ... Origin ... Insertion ... Action

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    • Muscle - Rectus Abdominis
    • Origin - Pubic Crest
    • Insertion - Xiphoid Process of the Sternum and 5th, 6th, 7th Cartilages of the Ribs
    • Action - Flexion of the Trunk and Compression of Abdominal Contents
  2. Muscle ... Origin ... Insertion ... Action

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    • Muscle - Internal Oblique
    • Origin - Inguinal Ligament, Iliac Crest, Lumbar Fascia
    • Insertion - Conjoint Tendon, Linea Alba (through the abdominal aponeurosis), and Lower 3 Ribs
    • Action - Lateral Flexion and Rotation (when one side contracts), Compresses the Abdomen
  3. Muscle ... Origin ... Insertion ... Action

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    • Muscle - External Oblique
    • Origin - Lower 8 Ribs
    • Insertion - Anterior Half of Iliac Crest and Linea Alba (through the abdominal aponeurosis)
    • Action - Lateral Flexion and Rotation (when one side contracts), Compresses the Abdomen
  4. Muscle ... Origin ... Insertion ... Action

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    • Muscle - Transverse Abdominis
    • Origin - Anterior Iliac Crest, Lateral Inguinal Ligament, Thoracolumbar Fascia, Cartilage of Lower 6 Ribs
    • Insertion - Abdominal Aponeurosis to Linea Alba
    • Action - Compresses the Abdomen
Author
islayinnes
ID
163888
Card Set
Muscles of the Back and Trunk
Description
Anterior Muscles of the Back and Trunk and their Actions
Updated