EN | DE | PT Contact How to study Login Register

Infratemporal Fossa - want to learn more about it?

Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.

Sign up for your free Kenhub account today and join over 931,206 successful anatomy students.

“I would honestly say that Kenhub cut my study time in half.” – Read more. Kim Bengochea Kim Bengochea, Regis University, Denver

Infratemporal Fossa

The infratemporal fossa is a space that exists below the temporal fossa. When seen on the skull without the soft tissues, these two anatomical landmarks can be seen to communicate with one another. 

The fossa is shaped irregularly and is situated below and medial to the zygomatic arch. It is not fully enclosed by bone. The infratemporal fossa serves as the passageway for many neurovascular structures. In addition to this, it contains superficial muscles like the inferior portion of the temporalis muscle, the lateral pterygoid muscle and the medial pterygoid muscle.

Key Facts
Borders Superior: greater wing of the sphenoid bone
Inferior: medial pterygoid muscle
Anterior: maxilla
Posterior: styloid and condylar processes
Medial: sphenoid and palatine bones
Lateral: ramus and coronoid processes of the mandible
Content Muscles: temporalis, lateral pterygoid, medial pterygoid 
Vessels: maxillary artery, pterygoid venous plexus
Nerves: mandibular, posterior superior alveolar, chorda tympani, lesser petrosal nerves; otic ganglion
Vascularization Branches of the maxillary artery grouped into mandibular, pterygoid and pterygopalatine parts
Innervation Branches of the maxillary and mandibular nerves

This article will discuss the anatomy and content of the infratemporal fossa.

Borders

The fossa is bordered superiorly by the greater wing of the sphenoid bone at the level of the foramina ovale and spinosum. Inferiorly, there is no bony anatomical structure to limit it, but there is the medial pterygoid muscle that runs anteriorly to attach to the mandible. The maxilla forms the anterior border of the cavity and the styloid and condylar processes make up the posterior barricade. Medially, the sphenoid and the palatine bones form a vertical bony rest and laterally the ramus and coronoid process cover the fossa's opening.

Contents

The following anatomical structures pass through the infratemporal fossa:

Blood Supply

The vascular supply of the infratemporal fossa comes singularly from the maxillary artery. The branches have been divided into three sections for clarity and are categorized according to the anatomical structure closest to them, including the:

  • mandibular part
  • the pterygoid part
  • the pterygopalatine part
Recommended video: Maxillary artery
Maxillary artery and its branches.

The first part, which is the mandibular part, contains several arterial branches, such as the deep auricular, the anterior tympanic, the middle and accessory meningeal arteries and the inferior alveolar artery. The branches pass between the mandible and the sphenomandibular ligament.

The second part, otherwise known as the pterygoid part, contains vessels that pass obliquely and anterosuperiorly between the mandibular ramus and the temporalis muscle. The list of vascular constituents includes the anterior and posterior deep temporal artery, the masseteric artery, the pterygoid artery and the buccal artery.

Lastly, the pteryogopalatine, or third, part is that which holds the posterior superior alveolar artery that runs from the infratemporal fossa to the pterygopalatine fossa via the pterygomaxillary fissure.

Venous drainage is managed solely by the pterygoid plexus which is most dense in and around the infratemporal fossa.

Maxillary artery - lateral-left view

Innervation

The infratemporal fossa is densely innervated due to the large amount of musculature and vessels that pass through it and that are situated adjacently. The maxillary nerve and the mandibular nerve contribute their branches, with the mandibular nerve providing nerves from both its anterior and posterior divisions. The anterior division contains the masseteric nerve, the anterior and posterior deep temporal, the medial and lateral pterygoid nerves and the buccal nerve. Meanwhile, the posterior division includes the auriculotemporal nerve, the lingual nerve, the inferior alveolar nerve and the mylohyoid nerve.

The maxillary nerve gives a single branch known as the posterior superior alveolar nerve. Other nervous structures are mentioned above in the contents of the fossa save the parasympathetics of the parotid gland, which can be found deep in the most medial part of the fossa.

Highlights

The infratemporal fossa is a space that exists below the temporal fossa. Its borders include:

  • Superiorly - greater wing of the sphenoid bone
  • Inferiorly - medial pterygoid muscle
  • Anteriorly - maxilla
  • Posteriorly - styloid and condylar processes
  • Medially - sphenoid and palatine bones
  • Laterally - ramus and coronoid process of the mandible

The following anatomical structures pass through the infratemporal fossa:

The vascular supply comes from the maxillary artery, while the innervation is via the branches of the mandibular and maxillary nerves.

Infratemporal Fossa - want to learn more about it?

Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.

Sign up for your free Kenhub account today and join over 931,206 successful anatomy students.

“I would honestly say that Kenhub cut my study time in half.” – Read more. Kim Bengochea Kim Bengochea, Regis University, Denver

Show references

References:

  • Neil S. Norton, Ph.D. and Frank H. Netter, MD, Netter’s Head and Neck Anatomy for Dentistry, 2nd Edition, Elsevier Saunders, Chapter 7 Temporal and Infratemporal Fossae, Page 210 to 222.
  • Frank H. Netter, Atlas der Anatomie, 5th Edition (Bilingual Edition: English and German), Saunders, Kapitel 1, Tafel 55.

Author:

  • Dr. Alexandra Sieroslawska

Illustrators:

  • Skull - lateral-left view - Yousun Koh
  • Temporalis muscle - lateral-left view - Yousun Koh
  • Lesser petrosal nerve - lateral-left view - Paul Kim
  • Maxillary artery - lateral-left view - Paul Kim
  • Mandibular nerve - lateral-left view - Paul Kim
  • Maxillary nerve - lateral-left view - Paul Kim
© Unless stated otherwise, all content, including illustrations are exclusive property of Kenhub GmbH, and are protected by German and international copyright laws. All rights reserved.

Related diagrams and images

Posterior and lateral skull

Anterior view of the skull

Continue your learning

Article (You are here)
Other articles
Show 16 more articles
Well done!

Register now and grab your free ultimate anatomy study guide!

Create your free account.
Start learning anatomy in less than 60 seconds.