Anatomy W9 - Infraorbital Nerve and the G&L Palatine Nerves Flashcards
Where does the maxillary nerve branch into the posterior superior alveolar nerve?
Branches in the pterygopalatine fossa before the maxillary nerve enters the orbit and becomes the infraorbital nerve.
What is the main continuation of the maxillary nerve called?
The infraorbital Nerve
Name the branches of the infraorbital nerve within the maxillary sinus.
Middle superior alveolar nerve (sometimes not present)
Anterior superior alveolar nerve
When does the maxillary nerve become the infraorbital nerve?
When it enters the orbit via the inferior orbital fissure
Where does the maxillary nerve enter the orbit to become the infraorbital nerve?
The inferior orbital fissure
What does the infraorbital nerve supply?
The lower eyelid The front of the cheek The side of the nose The upper lip The gums of the incisors
Where does the infraorbital nerve leave the face?
The infraorbital foramen
Name the branches of the infraorbital nerve on the face
The lacrimal branch - lower eyelid
The nasal branch - side of the nose
The labial branch - upper lip & gums
Why would a clinician Use a superior alveolar nerve block?
If there is infection present in the maxilla
What nerve does the G&L palatine nerves branch from?
The maxillary nerve
What does the greater palatine nerve supply?
The posterior 2/3rds of the hard palate
- nasopalatine nerve supplies the ant 1/3rd.
What does the lesser palatine nerve supply?
The soft palate
Describe where the lesser palatine nerves branch from.
The lesser palatine nerves branch off of the greater palatine nerve before the GPN enters the hard palate via the greater palatine foramen.
Why is the greater palatine nerve rarely given a block injection?
Since the mucosa of the palate is bound tightly to the bony palate = sore injection
Risk of the lesser palatine nerves being anaesthetised = anaesthetised soft palate which is required for swallowing.
