INNERVATION OF THE NASAL CAVITY

Question 1

what are the sensory innervations of the nasal cavity?

Answer 1

olfactory 
-anterior ethmoidal n
--internal nasal n
--external nasal n
*SVA SSA
trigeminal 
-ophthalmic n
--nasociliary n (GSA)
---anterior and posterior (GSA) ethmoidal n
----external nasal n
----internal nasal n (GSA)
-maxillary branch
--posterior nasal n (superior, middle and inferior) GSA
--nasopalatine n (GSA)
--descending palatine
---lesser palatine n
---greater palatine n
---alveolar branch
----superior/inferior anterior alveolar n
----posterior superior alveolar branch

Question 2

what is the motor innervation of the nasal cavity?

Answer 2

facial n

• greater petrosal n (GVE,SVA)
• –pterygopalatine ganglion
• –pterygoid canal or Vivian canal

Question 3

describe the pterygopalatine ganglion?

Answer 3

autonomic motor; postganglionic sympathetic ganglion; GVE for secretion; sits in pterygopalatine fossa

remember that preganglionic parasympathetic fibers synapse here

Question 4

what are contents of the pterygoid canal?

Answer 4

pterygopalatine ganglion
greater petrosal n
deep petrosal n branches
part of carotid plexus that makes the superior cervical plexus