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Human Anatomy: Muscle Groups


Human Anatomy



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Muscle Function & Other Pertinent Medical Information
- EXTERNAL INTERCOSTALS -
ORIGIN: Inferior border of ribs as far back as posterior angles
INSERTION: Superior border of ribs below, passing obliquely downwards and backwards
ACTION: Fix intercostal spaces during respiration. Assists forced inspiration by elevating ribs
NERVE: Muscular collateral branches of intercostal nerves






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