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msviolet_26
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Scalenus anterior
- O: transverse processes of C3-C6
- I: inner border of 1st rib
- N: ventral rami C4,5,6
- A: elevates 1st rib, flexes neck laterally; acting unilaterally, felse and rotates cervical spine to the opposite side.
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Scalenus Medius
- O: transverse processes of C2-C7
- I: superior surface of 1st rib
- N: ventral rami C3,4,5,6,7,8
- A: elevates 1st rib, flexes neck laterally
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Scalenus Posterior
- O: transverse processes of C4-C6
- I: superior surface of 2nd rib
- N: ventral rami C6,7,8
- A: elevates 2nd rib
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 Sternocleidomastoid
- O: sternal head - manubrium of sternum; clavicular head - medial end of clavicle
- I: mastoid process
- N: spinal accessory & C2, C3
- A: bilateral: flexes neckunilateral: tilts head laterally, rotates face to opposite side
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Rectus Abdominis
- O: pubic symphisis & pubic crest
- I: xiphoid process, 5th to 7thcostal cartilage
- N: ventral rami of inferior 6thoracic nerves
- A: flexes trunk,compresses abdominal viscera
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External abdominal oblique
- O: external surface inferiorborders of 5th to 12th ribs
- I: anterior ½ iliac crest,linea alba,pubic tubercle
- N: inferior 6 thoracic nerves& subcostal nerve
- A: flexes and rotates trunk,compresses abdominal viscera
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Internal abdominal oblique
- O: iliac crest,thoracolumbar fascia,inguinal ligament
- I: inferior borders of ribs 10-12,linea alba,pubic bone
- N: ventral rami of inferior sixthoracic & first lumbar nn.
- A: flexes and rotates trunk,compresses abdominal viscera
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Transversus Abdominus
- O: internal surfaces of 7th to12th costal cartilages,thoracolumbar fascia,iliac crest,inguinal ligament
- I: linea alba,pubic crest
- N: ventral rami of inferior sixthoracic & first lumbar nn.
- A: compresses abdominal viscera
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