Regional Anatomy - Triangles of the Neck

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1. Main content of the submental triangle

  • parotid lymph nodes --> filter lymph draining from floor of the mouth and parts of the tongue
  • Submental lymph nodes --> filter lymph draining from floor of mouth and parts of tongue
  • digastric lymph nodes --> filter lymph draining from floor of mouth and parts of tongue
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2. Borders of the occipital triangle

  • Anterior- trapezius, Posterior- omohyoideus, inferior- sternocleidmastoid, floor- splenius capitis, levator scapulae and scalene medius and posterior
  • Anterior- sternocleidomastoid, Posterior- trapezius, inferior- omohyoideus, floor- splines captious, elevator scapulae and scalene medium and posterior
  • Anterior- omohyoidues, Posterior- sternocleidomastoid, inferior- trapezius, floor- splenius capitis, levator scapulae and scalene medius and posterior

3. Contents of the Muscular triangle

  • Contains: no vessels, infrahyoid muscles, the pharynx, the thyroid and parathyroid
  • contains: no vessels, Suprahyoid muscles, the larynx, the thyroid and parathyroid
  • Contains: blood vessels, infrahyoid muscles, the pharynx, the thyroid and parathyroid

4. Borders of the posterior triangle

  • Anterior- Posterior border of the sternocleidomastoid, Posterior- Anterior border of the trapezius muscle, Inferior- middle 3rd of the clavicle
  • Anterior- Anterior border of the sternocleidomastoid, Posterior- posterior border of the sternocleidomastoid, Inferior- middle 3rd of the clavicle
  • Anterior- posterior border of the sternocleidomastoid, Posterior- anterior portion of the sternocleidomastoid, inferior- the first third of the clavicle

5. The muscles within the infrahyoid group

  • Sternohyoid, Sternothyroid, stylohyoid & sternocleidomastoid
  • Sternohyoid, omohyoid, sternothyroid & thyrohyoid
  • Sternohyoid, Sternothyroid, thyrohyoid, stylohyoid
  • sternohyoid, digastic, geniohyoid & mylohyoid

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