Anterior Triangle Of The Neck Short Essay Question And Answers

Anterior Triangle Of The Neck Short Essay Question And Answers

Describe the boundaries and contents of carotid triangle of neck (or) Name four branches of external carotid artery given in the carotid triangle (or) Lingual artery (or) Name the muscles forming the floor of carotid triangle.
Answer:

Carotid Triangle:

Boundaries:

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Contents:

1. Arteries:

1. Common carotid artery:
   • It enters the canal at its inferior angle & ascends upwards
   • It terminates in the center of the triangle by bifurcating into the internal & external carotid arteries
   • At its termination it presents a carotid sinus & a carotid body
     Carotid sinus:
   • It is fusiform dilatation
   • It act as a baroreceptor
     Carotid body:
   • It is a small oval structure situated close to the posterior wall of the carotid sinus
   • It acts as a chemoreceptor
2. External carotid artery:
   • It arises from the common carotid artery in the triangle & lies anteromedially
   • It gives out following branches in triangle

3. Internal carotid artery:

• • It lies posterolaterally
  • It doesn’t give any branches in the carotid triangle

2. Veins:

1. Internal jugular vein
   • It is located near the posterior angle of the triangle lying lateral to the internal & common carotid arteries
2. Common facial vein drains into internal jugular vein
3. Pharyngeal veining in the internal jugular vein
4. Lingual vein terminates in the internal jugular vein

3. Nerves:

1. Vagus nerve
2. Superior laryngeal branch of the vagus
   • It divides into external & internal laryngeal nerves
3. Spinal accessory nerve
   • Runs backwards over the internal jugular vein
4. Hypoglossal nerve
   • Runs forward over external & internal carotid arteries
5. Sympathetic chain
   • Runs posterior to the carotid sheath

4. Carotid sheath with its contents:

• It contains

1. 1. Common carotid artery
   2. Internal carotid artery
   3. Internal jugular vein
   4. Vagus nerve

5. Lymph nodes:

• The carotid triangle contains deep cervical lymph node
• This includes
  1. Jugulodigastric node
  2. Juguloomohyoid node