Infraorbital artery

Infraorbital artery
Infraorbital artery
	Plan of branches of internal maxillary artery. (Infraorbital at far right.)
	Left orbicularis oculi, seen from behind. (Infraorbital labeled at lower left.)
Details
Source	Maxillary artery
Branches	Orbital branches ; anterior superior alveolar arteries
Identifiers
Latin	Arteria infraorbitalis
TA98	A12.2.05.078
TA2	4447
FMA	49767
	Anatomical terminology

The infraorbital artery is a small[1] artery in the head that arises from the maxillary artery and passes through the inferior orbital fissure to enter the orbit, then passes forward along the floor of the orbit, finally exiting the orbit through the infraorbital foramen to reach the face.

Anatomy

Origin

The infraorbital artery arises from the maxillary artery; it often arises in conjunction with the posterior superior alveolar artery.[2] It may be considered a continuation of the third part of the maxillary artery[1] and continues the direction of the maxillary artery.

Course

It passes anterior-ward to enter the orbit through the inferior orbital fissure.[2] In the orbit,[2][1] it courses along the floor of the orbit[1] with the infraorbital nerve first along the infraorbital groove and then the infraorbital canal.[2] It exits the orbit (with the infraorbital nerve) through infraorbital foramen to reach the face,[1] beneath the infraorbital head of the levator labii superioris muscle.

Branches

While in the canal, it gives off:

Orbital branches - assist in supplying the inferior rectus and inferior oblique and the lacrimal sac.
Anterior superior alveolar artery - supplies upper/maxillary canine and incisor teeth.[1]
Middle superior alveolar artery - upper/maxillary canine and incisor teeth.[1] May be absent.[2][1]

On the face, some branches pass upward to the medial angle of the orbit and the lacrimal sac, anastomosing with the angular artery, a branch of the facial artery; others run toward the nose, anastomosing with the dorsal nasal branch of the ophthalmic artery; and others descend between the levator labii superioris and the levator anguli oris, and anastomose with the facial artery, transverse facial artery, and buccal artery.

The four remaining branches arise from that portion of the maxillary artery which is contained in the pterygopalatine fossa.

Additional images

Branches of the maxillary artery.

Diagram showing the origins of the main branches of the carotid arteries.
Bloodvessels of the eyelids, front view.

References

Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). Elsevier Australia. pp. 363–364. ISBN 978-0-7295-3752-0.
Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 653. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)

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

External links

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

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[:022-1] Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). Elsevier Australia. pp. 363–364. ISBN 978-0-7295-3752-0.

[:224-2] Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 653. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)