The sphenopalatine artery (nasopalatine artery) is an artery of the head, commonly known as the artery of epistaxis.^[1] It passes through the sphenopalatine foramen to reach the nasal cavity. It is the main artery of the nasal cavity.^[2]

The sphenopalatine artery is a branch of the maxillary artery which passes through the sphenopalatine foramen into the cavity of the nose, at the back part of the superior meatus. Here it gives off its posterior lateral nasal branches.

Crossing the under surface of the sphenoid, the sphenopalatine artery ends on the nasal septum as the posterior septal branches. Here it will anastomose with the branches of the greater palatine artery.

The sphenopalatine artery is the artery responsible for the most serious, posterior nosebleeds (also known as epistaxis). It can be ligated surgically or blocked under image guidance with minimally invasive techniques by interventional radiologist using tiny microparticles to control such nosebleeds.

• Kiesselbach's plexus

This article incorporates text in the public domain from page 562 of the 20th edition of Gray's Anatomy (1918)

• lesson4 at The Anatomy Lesson by Wesley Norman (Georgetown University) (infratempfossaart)
• lesson9 at The Anatomy Lesson by Wesley Norman (Georgetown University) (nasalseptumart)