face, nasal

Nasal cavity – blood supply

  • Sphenopalatine a.
    • largest branch of the 3rd part of the maxillary a. as it courses into the pterygopalatine fossa
    • bifurcates into septal and lateral nasal wall branches
    • courses with the nasopalatine n., a branch of V2
    • anastomoses anteriorly with branches from anterior and posterior ethmoidal aa. from ophthalmic a. in the orbit
    • anastomoses anterior-inferiorly with greater palatine a. (a branch of descending palatine a. from the maxillary a.) within the incisive foramen of the hard palate
face, nasal

Nasal cavity – innervation

  • V1 ophthalmic branch of trigeminal n. (GSA)
    • anterior ethmoidal branches course through ethmoidal air cells onto the lateral nasal wall and nasal septum
    • innervation to mucosae of superior nasal cavity
  • V2 maxillary branch of trigeminal n. (GSA)
    • nasopalatine n. courses with sphenopalatine a. to innervate┬ámucosae of inferior nasal cavity
    • infraorbital n. gives off lateral nasal branches to alae of vestibule
  • VII facial n. (GVE)
    • parasympathetic innervation to mucosal seromucous glands of nasal sinuses
    • uses pterygopalatine ganglion as point of synapse