Intratemporal Course Of The Facial Nerve

Intratemporal Course Of The Facial Nerve

Question 1. Submandibular Ganglion
Answer:

• It is a ganglion of parasympathetic system
• It rests on Hyoglossus muscle

Submandibular Ganglion Relations:

• Above-Lingual nerve
• Below- Deep part of Submandibular gland

Submandibular Ganglion Roots:

Submandibular Ganglion Functions:

• Supply the Sublingual, Submandibular & anterior lingual glands

Question 2. Intrapetrous part of facial nerve
Answer:

• At the bottom of the meatus, sensory & motor roots of facial nerve fuses to form a single trunk, which lies in petrous temporal bone
• In the facial canal
• The course is divided into three parts

1. 1. First part- Directed above the vestibule
   2. Second part- present above the promontory
   3. Third part- Lies behind the promontory
      • First bend is sharp called genu
      • Second bend is gradual

• Extracranial course
  • Exits skull via stylomastoid foramen

Question 3. List the branches of facial nerve soon after its emergence through the stylomastoid foramen
Answer:

• Posterior auricular
• Digastric
• Stylohyoid