Maxillary artery

Artery: Maxillary artery
Plan of branches of maxillary artery. ("Internal maxillary" is horizonal at left center.)
Plan of branches of maxillary artery.
Latin	arteria maxillaris
Gray's	subject #144 559
Source	external carotid artery
Branches	1st part: anterior tympanic - deep auricular - middle meningeal - superior tympanic - accessory meningeal - inferior alveolar 2nd part: Posterior deep temporal artery - Pterygoid branches - masseteric - buccinator - Anterior deep temporal artery 3rd part: posterior superior alveolar - infraorbital - descending palatine - artery of the pterygoid canal - sphenopalatine
Vein	maxillary veins
Precursor	aortic arch 1

The maxillary artery (or internal maxillary artery in older texts) is an artery that supplies deep structures of the face. It comes just out behind the neck of the mandible.

Structure

Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries. Origin of maxillary artery is labeled.

The maxillary artery, the larger of the two terminal branches of the external carotid artery, arises behind the neck of the mandible, and is at first imbedded in the substance of the parotid gland; it passes forward between the ramus of the mandible and the sphenomandibular ligament, and then runs, either superficial or deep to the lateral pterygoid muscle, to the pterygopalatine fossa.

It supplies the deep structures of the face, and may be divided into mandibular, pterygoid, and pterygopalatine portions.

First portion

The first or mandibular portion passes horizontally forward, between the neck of the mandible and the sphenomandibular ligament, where it lies parallel to and a little below the auriculotemporal nerve; it crosses the inferior alveolar nerve, and runs along the lower border of the lateral pterygoid muscle.

Branches include:

• Deep auricular artery
• Anterior tympanic artery
• Middle meningeal artery
• Inferior alveolar artery which gives off its mylohyoid branch just prior to entering the mandibular foramen
• Accessory meningeal artery

Second portion

The second or pterygoid portion runs obliquely forward and upward under cover of the ramus of the mandible and insertion of the temporalis, on the superficial (very frequently on the deep) surface of the lateral pterygoid muscle; it then passes between the two heads of origin of this muscle and enters the fossa.

Branches include:

• Masseteric artery
• Pterygoid branches
• Deep temporal arteries (anterior and posterior)
• Buccal artery

Third portion

The third or pterygopalatine portion lies in the pterygopalatine fossa in relation with the pterygopalatine ganglion. This is considered the terminal branch of the maxillary artery.

Branches include:

• Sphenopalatine artery (Nasopalatine artery is the terminal branch of the Maxillary artery)
• Descending palatine artery
• Infraorbital artery
• Posterior superior alveolar artery
• Artery of pterygoid canal
• Pharyngeal artery

Nomenclature

• Formerly, the term "external maxillary artery" was used to describe what is now known as the facial artery (per Terminologia anatomica.) Currently, the term "external maxillary artery" is less commonly used, and the terms "internal maxillary artery" and "maxillary artery" are equivalent.

Mnemonic to remember branches: DAM I AM Piss Drunk, But Stupid Drunk I Prefer, Must Phone Alcoholics Anonymous

Additional images

Mandible. Outer surface. Side view.

Lateral head anatomy detail

Head anatomy anterior view

External links

• Maxillary+artery at eMedicine Dictionary
• lesson4 at The Anatomy Lesson by Wesley Norman (Georgetown University) (parotid4)
• SUNY Labs 27:12-0101 - "Infratemporal Fossa: Branches of the Maxillary Artery"
• Mnemonic at medicalmnemonics.com 935
• Overview at tufts.edu

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.