Maxillary Nerve Territory

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Questions and Answers

Which nerve does the V2 give off when entering into the PPF?

Zygomatic nerve (correct)

Posterior superior alveolar nerve

Lacrimal nerve

Greater palatine nerve

What is the function of the mucosal branches of the PSAN?

Innervate the upper premolars and anterior teeth

Innervate the maxillary sinus mucosa

Enter the alveolar canals at the tuberosity

Distribute to the mucosa of the upper vestibular sulcus (correct)

Which nerve courses above the zygomatic nerve in the orbit?

Posterior superior alveolar nerve

Greater palatine nerve

Zygomatic nerve

Lacrimal nerve (correct)

What is the function of the dentosinusal branches of the PSAN?

Innervate the upper molars and parodontium Signup and view all the answers

What is the pathway of the zygomatic nerve after exiting the zygomatic canal?

Gives off sensory branches to the skin in the zygomatic region and the skin of the temple Signup and view all the answers

What is the function of the anastomosis between the lacrimal and zygomatic nerves?

To allow postganglionic parasympathetic fibres of the PPG to reach the lacrimal gland Signup and view all the answers

What is the origin of the lacrimal nerve?

V1 Signup and view all the answers

Where do the dentosinusal branches of the PSAN extend to?

Lateral antral canal and Wood Jones’ canalis sinuosus Signup and view all the answers

What is the branch of the maxillary nerve that gives off a meningeal branch before exiting through the foramen rotundum?

V2 Signup and view all the answers

What is the function of the pterygopalatine nerves in the pterygopalatine fossa?

They are sensory nerves that carry sensory fibres Signup and view all the answers

Which branch of the PPG courses through the palatovaginal canal to distribute in the nasopharyngeal mucosa?

Pharyngeal branch Signup and view all the answers

What is the name of the nerve that descends on the septum as a branch of the posterior-superior-medial nasal branch?

Scarpa's nasopalatine nerve Signup and view all the answers

Which of the following nerves courses with the lesser palatine arteries through the lesser palatine canals and foramina?

Lesser palatine nerve Signup and view all the answers

What is the distribution of the greater palatine nerve?

It is distributed to the mucosa of the hard palate up to the level of the upper canine Signup and view all the answers

What is the location of the orbital branch of the PPG?

It is distributed to the orbital apex and orbits the periosteum and ethmoid air cells Signup and view all the answers

What is the name of the canal through which the greater palatine nerve descends?

Greater palatine canal Signup and view all the answers

Study Notes

Maxillary Nerve (V2) Territory

Before exiting through the foramen rotundum, V2 gives off a meningeal branch.
In the pterygopalatine fossa (PPF), V2 is united to the pterygopalatine ganglion (PPG) by pterygopalatine nerves, which are sensory nerves.

Pterygopalatine Ganglion (PPG) Branches

Pharyngeal branch of the PPG courses through the palatovaginal canal to distribute in the nasopharyngeal mucosa.
Orbital branches of the PPG ascend into the orbital apex and are distributed to the orbital periosteum and ethmoid air cells.
Posterior-superior nasal branches of the PPG enter the nasal fossa through the sphenopalatine foramen and are divided into:
- Postero-superior-lateral nasal branches (PSL) for the mucosa in the posterior part of the lateral nasal wall.
- Postero-superior-medial nasal branches (PSM) for the postero-superior mucosa on the nasal septum.
- One of the PSM branches descends on the septum as Scarpa's nasopalatine nerve (NPN), which will continue through the nasopalatine canal to innervate the hard palate's anterior mucosa at the upper incisors and canine level.

Palatine Nerves

Lesser palatine nerves course with the lesser palatine arteries through the lesser palatine canals and foramina to distribute sensory fibers to the mucosa of the soft palate.
Greater palatine nerve descends into the greater palatine canal and foramen and continues beneath the mucosa of the posterior hard palate, distributing to the mucosa on the palatal vault up to the level of the upper canine.

Other Branches of V2

Zygomatic nerve: emerges from the PPF, courses on the lateral wall of the orbit, and enters the zygomatic canal into the zygomatic bone. It gives sensory branches to the skin in the zygomatic region and the skin of the temple (anterior skin of the temporal region).
Posterior superior alveolar nerves (PSAN): emerge above the tuberosity of the maxilla, descend and branch on the tuberosity, and distribute to:
- Mucosa of the upper vestibular sulcus at the level of the posterior teeth.
- Maxillary sinus mucosa through dentosinusal branches.
- Upper molars and parodontium through dentosinusal branches.
- Upper premolars and anterior teeth through the lateral antral canal and Wood Jones' canalis sinuosus.

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Description

This quiz covers the territory of the maxillary nerve, including its branches and pathways in the pterygopalatine fossa and nasopharynx.