Anatomy (PNS) · MU Sofia

197. Maxillary nerve (V2).

Covers the maxillary nerve (V2), the purely sensory middle division of the trigeminal nerve, following its course from the trigeminal ganglion through the cavernous sinus, foramen rotundum and pterygopalatine fossa to the infraorbital canal, where it becomes the infraorbital nerve. Lists its branches in order: meningeal, zygomatic with its two terminal branches, posterior superior alveolar, lesser and greater palatine, then middle and anterior superior alveolar nerves, and the three facial branches of the infraorbital nerve.

Inside: 2 sections · 2 labelled pictures · 10 flashcards · 2 min

Topic 18 of 44 in the MU Sofia syllabus for Anatomy (PNS) (Medicine, Year 2). The free AceMed note covers it in 2 sections, about 219 words (2 min of reading), with 10 flashcards.

In this note

  1. MAXILLARY NERVE [V₂]
  2. Course :

MAXILLARY NERVE [V₂]

The maxillary nerve (V2) is the seconed (middle) division of the trigeminal ganglion.

  • Purely sensory, providing innervation to various regions of the face, including the upper jaw, cheek & part of the nose.

Course :

  • From the trigeminal (1) ganglion the maxillary n. moves forward in the lateral wall of the cavernous (2) sinus (inferiorly to the opthalmic nerve) wich is located in the middle cranial fossa.
  • It will leaves the middle cranial fossa to the foramen (3) rotundum (a bony opening in the sphenoid bone).
  • Then passes through the pterygopalatine (4) fossa, and gives rise to several branches.
  • The maxillary n. then enters through infraorbital (5) fissure to the infraorbital (6) canal, and continues as Infraorbital nerve.
  • The infraorbital n. then emerges to the face through the infraorbital (7) foramin.
  1. 1. Meningeal br. - it gives it before exit the middle cranial fossa.
  • In pterygopalatine fossa :
  1. 2. Zygomatic br. - enter the orbit through infraorbital fissure.
  • ↳ communicate with lacrimal n.
  • ↳ Gives 2 terminal branches:
  1. 1.2. Zygomaticofacial n.
  2. 2.2 Zygomaticotemporal n.
  3. 3. Post. Superior alveolar. (PSA)
  4. 4. Lesser palatine n.
  5. 5. Greater palatine n.
  • In infraorbital canal :
  1. 6. Middle superior alveolar n. (MSA)
  2. 7. Anterior superior alveolar n. (ASA)

The infraorbital nerve gives 3 terminal branches on face:

  1. 8. Inferior palpebral.
  2. 9. Lateral nasal.
  3. 10. Superior labia.

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