Sunday, May 28, 2023

Upper teeth palatal mucosa supplied by.. Nasopalatine nerve



Upper teeth palatal mucosa supplied by?

  • A- Nasopalatine nerve***
  • B- Anterior palatine nerve.
  • C- Both.
  • D- Post superior alveolar nerve.

Nervus nasopalatinus:

collateral branch of the upper maxillary nerve that emerges from the upper maxillary medium at the time it penetrates into the maxillary pterigo fossa.

It often originates divided into two or three fillets, which are directed downwards and somewhat inside, reaches the sphenopalatine ganglion, passing through its outer face or in front of it.

Apparently it ends in this ganglion, to the point that certain authors describe it with the name of descending root of the palatine sphenoid ganglion. Actually, the sphenopalatine nerve only sends to the ganglion, some fibers that are called roots of the sphenopalatine ganglion.

Most sphenopalatine nerve fibers have no more than simple contiguity relationships with the ganglion.
Synonyms: Scarpa's nasopalatine nerve; Scarpa's nerve.

 Nasopalatine nerve:

a branch from the pterygopalatine ganglion, passing through the sphenopalatine foramen, crossing to and then down the nasal septum, and through the incisive foramen to supply the mucous membrane of the hard palate.

Course and distribution: the nerves are branches of the pterygopalatine ganglion, suspended by the ganglionic branches of the maxillary division of the trigeminal nerve.

The nerves are distributed to the hard and soft palate, nasal cavity and tonsils.
They have two branches. Branches: greater palatine nerve and lesser palatine nerves.

Root: sensory nuclei of trigeminal nerve extending from the spinal nucleus in the upper cervical region through the pontine nucleus (at floor of fourth ventricle), to the midbrain (mesencephalic nucleus).