Tributaries Of External And Internal Jugular Veins

Tributaries Of External And Internal Jugular Veins

Question 1. Ansa cervicalis
Answer:

Ansa cervicalis is a thin nerve loop lying embedded in the anterior wall of the carotid sheath

Ansa cervicalis Formation: It is formed by

1. Superior root also called descendens hypoglossi
   • Derived from first cervical nerve
   • C1 & C2 joins hypoglossal nerve to form it
   • Descends between internal carotid artery & common carotid artery
2. Inferior root
   • Derived from second & third cervical nerve
   • Descends & winds around internal jugular vein & joins superior root

Ansa cervicalis Distribution:

1. Superior root
   • Superior belly of omohyoid
2. Inferior root
   • Sternohyoid, sternothyroid, inferior belly of omohyoid

Question 2. Name four tributaries of external jugular vein
Answer:

• The posterior external jugular vein
• Transverse cervical vein
• Suprascapular vein
• Anterior jugular vein

Question 3. Name the tributaries of internal jugular vein
Answer:

• Inferior petrosal sinus
• Common facial vein
• Lingual vein
• Pharyngeal vein
• Superior thyroid vein
• Middle thyroid vein