Triangles of neck

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Across
  1. 4. fascial sheath covering IJV, vagus and carotids
  2. 6. N.S of inferior belly of omohyoid
  3. 10. cranial part of accessory n goes along with this CN
  4. 12. vertically disposed muscle of floor of posterior triangle
  5. 13. IJV joins this vein to form the brachiocephalic v
  6. 14. smaller subdivision of posterior triangle
  7. 16. this triangle contains no significant structures
  8. 17. fascia attaching inferior belly of omohyoid to clavicle
  9. 19. fascial carpet of posterior triangle
  10. 20. this name comes from the Greek word for heavy sleep
Down
  1. 1. ligament that subdivides digastric triangle
  2. 2. total branches of external carotid a
  3. 3. anterior belly of digastric is derived from which arch
  4. 5. thickest cutaneous nerve in the body
  5. 7. point point on the posterior border of SCM where 4 cutaneous nerves emerge
  6. 8. CN X,XI,XII are seen in this triangle
  7. 9. the first loop of facial artery is to enclose
  8. 11. accessory this is the true content of the posterior triangle
  9. 15. this is the tubular prolongation of the prevertebral fascia
  10. 18. the part of the brachial plexus visible in the posterior triangle