Posterior superior nasal nerves

Posterior Superior Nasal Nerves

The Posterior Superior Nasal Nerves are a group of nerves that supply the posterior and superior parts of the nasal cavity. They are branches of the Pterygopalatine ganglion, which is itself a part of the Maxillary nerve (the second branch of the Trigeminal nerve).

Anatomy

The Posterior Superior Nasal Nerves originate from the Pterygopalatine ganglion, which is located in the Pterygopalatine fossa. From there, they ascend into the nasal cavity, where they provide sensory innervation to the posterior and superior parts of the nasal cavity, including the superior nasal concha and the sphenoidal sinus.

Function

The primary function of the Posterior Superior Nasal Nerves is to provide sensory innervation to the nasal cavity. This includes the sensation of pain, temperature, and touch. They also play a role in the reflexive responses of the nasal cavity, such as sneezing.

Clinical significance

Damage to the Posterior Superior Nasal Nerves can result in a loss of sensation in the nasal cavity. This can lead to a variety of symptoms, including a reduced sense of smell (anosmia), nasal congestion, and recurrent sinus infections. In severe cases, it can also lead to a condition known as atrophic rhinitis, which is characterized by a dry and crusty nasal cavity.

See also

• Nasal cavity
• Pterygopalatine ganglion
• Maxillary nerve
• Trigeminal nerve

References

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  Gray's Anatomy illustration of the posterior superior nasal nerves