What is located in infratemporal fossa?
The infratemporal fossa contains the mandibular nerve, the inferior alveolar nerve, the lingual nerve, the buccal nerve, the chorda tympani nerve, and the otic ganglion.
What is infratemporal region?
The infratemporal fossa is an irregular space at the lateral aspect of the skull. As its name suggests, it is situated just inferior to the temporal fossa and deep to the ramus of the mandible. The temporal and infratemporal fossae communicate with each other through the opening deep to the zygomatic arch.
Why is the infratemporal fossa important?
Nerves coursing through and around the infratemporal fossa are responsible for providing a vast majority of sensory and motor function to the lower face and other important structures such as the dura mater.
Where is the Infratemporal space?
It is located posterior to the maxilla, between the lateral pterygoid plate of the sphenoid bone medially and by the base of skull superiorly. The term is derived from infra- meaning below and temporal which refers to the temporalis muscle.
What does infratemporal mean?
Medical Definition of infratemporal : situated below the temporal fossa.
What nerve goes through the infratemporal fossa?
The mandibular nerve enters the infratemporal fossa and passes through the foramen ovale in the sphenoid bone, and divides at that point into a smaller anterior and a larger posterior trunk. The main trunk gives off two branches at this point.
Which muscle travels within the infratemporal fossa?
The infratemporal fossa is a wedge-shaped space deep to the masseter muscle and the underlying ramus of the mandible. Structures that travel between the cranial cavity, neck, pterygopalatine fossa, and floor of the oral cavity, floor of the orbit, temporal fossa, and superficial regions of the head pass through it.
What is fossa in anatomy?
Fossa - A shallow depression in the bone surface. Here it may receive another articulating bone or act to support brain structures. Examples include trochlear fossa, posterior, middle, and anterior cranial fossa.
What is Infratemporal space infection?
Infratemporal space infection is a rare but serious sequel of odontogenic infection. The diagnosis is difficult due to non spe-cific signs and symptoms. Diabetes mellitus as a definitive risk factor for odontogenic infections needs more consideration during clinical procedures.
What is infratemporal surface?
The infratemporal surface is convex, directed backward and lateralward, and forms part of the infratemporal fossa. It is separated from the anterior surface by the zygomatic process and by a strong ridge, extending upward from the socket of the first molar tooth.
How do you expose the infratemporal fossa during dissection?
The infratemporal fossa is usually exposed through either a retro- or preauricular incision. Ultimately, the incision extends inferiorly to the medial border of the sternocleidomastoid muscle to provide vascular control of the internal carotid artery (ICA), external carotid artery (ECA), and internal jugular vein (Fig.
What separates the infratemporal from the pterygopalatine fossa?
The pterygomaxillary fissure is located between the anterior and posterior wall of the pterygopalatine fossa. It communicates with the infratemporal fossa and transmits the posterior superior alveolar nerve and the maxillary artery.
What is infratemporal surface?
The infratemporal surface is convex, directed backward and lateralward, and forms part of the infratemporal fossa. It is separated from the anterior surface by the zygomatic process and by a strong ridge, extending upward from the socket of the first molar tooth.
What are the muscles of the infratemporal region?
The muscles of the infratemporal fossa include the inferior portion of the temporalis muscle, the medial pterygoid and lateral pterygoid muscles. Lying either superficial or deep to the lateral pterygoid muscle, there's the pterygoid venous plexus and the maxillary artery.
What is Infratemporal space infection?
Infratemporal space infection is a rare but serious sequel of odontogenic infection. The diagnosis is difficult due to non spe-cific signs and symptoms. Diabetes mellitus as a definitive risk factor for odontogenic infections needs more consideration during clinical procedures.
What is Infratemporal crest?
Medical Definition of infratemporal crest : a transverse ridge on the outer surface of the greater wing of the sphenoid bone that divides it into a superior portion that contributes to the formation of the temporal fossa and an inferior portion that contributes to the formation of the infratemporal fossa.
What is the last vascular structure in the infratemporal fossa?
The last vascular structure within the infratemporal fossa is the pterygoid venous plexus.
What is the infratemporal fossa?
The infratemporal fossa, or IT fossa for short, is one of the most important spaces in the head, which acts as a conduit for neurovascular structures entering and exiting the cranial cavity. It contains vital structures such as the maxillary artery and mandibular nerve.
What are the structures of the infratemporal fossa?
Now, the important structures within the infratemporal fossa include muscles, vessels and nerves.
Which artery parallels the venous plexus?
This way, the tributaries of the venous plexus parallel the branches of the maxillary artery . Something to keep in mind about this plexus is its multiple routes of drainage.
Which artery passes anteriorly and inferiorly alongside the buccal nerve?
Third, the buccal artery passes anteriorly and inferiorly alongside the buccal nerve, to supply the buccal fat pat, buccal oral mucosa, and the buccinator muscle.
Which nerve splits into the inferior alveolar, auriculotemporal, lingual, buccal?
The mandibular nerve splits within the infratemporal fossa into branches that include the inferior alveolar, auriculotemporal, lingual, buccal, masseteric, and deep temporal nerves.
Where does the artery originate?
Let’s quickly run through six of the most important ones. First, the artery originates within the mass of the lateral pterygoid muscle, moves laterally and passes through the mandibular notch to enter the deep surface of the masseter muscle, which it supplies.
What is the infratemporal fossa?
Anatomical terminology. The infratemporal fossa is an irregularly shaped cavity, situated below and medial to the zygomatic arch. It is not fully enclosed by bone in all directions, and it contains superficial muscles that are visible during dissection after removing skin and fascia: namely, the lower part of the temporalis muscle, ...
Which nerve gives off the lateral pterygoid muscle?
The mandibular nerv e gives off four nerves to the four muscles of mastication in the infratemporal fossa. These are the masseteric nerve to masseter muscle, the deep temporal nerve to temporalis muscle, the lateral pterygoid nerve to lateral pterygoid muscle, and the medial pterygoid nerve to medial pterygoid muscle. It also gives branches to mylohyoid muscle, the anterior belly of digastric muscle, the tensor veli palatini muscle, and tensor tympani muscle .
Which nerve enters the infratemporal fossa from the middle cranial fossa?
Mandibular nerve which is the third branch of the trigeminal nerve (CN V 3 ), also known as the "inferior maxillary nerve" or nervus mandibularis, enters infratemporal fossa from middle cranial fossa through foramen ovale.
Which branch of the trigeminal nerve is transmitted by the foramen ovale?
superiorly, by the greater wing of the sphenoid below the infratemporal crest, and by the under surface of the temporal squama, containing the foramen ovale, which transmits the mandibular branch of the trigeminal nerve, and the foramen spinosum, which transmits the middle meningeal artery.
Which wing of the sphenoid transmits the mandibular branch of the trige?
superiorly, by the greater wing of the sphenoid below the infratemporal crest, and by the under surface of the temporal squama, containing the foramen ovale, which transmits the mandibular branch of the trigeminal nerve, and the foramen spinosum, which transmits the middle meningeal artery.
Which branch of the trigeminal nerve is located below the infratemporal crest?
Its boundaries may be defined by: superiorly, by the greater wing of the sphenoid below the infratemporal crest, and by the under surface of the temporal squama, containing the foramen ovale, which transmits the mandibular branch of the trigeminal nerve, and the foramen spinosum, which transmits the middle meningeal artery.
What are the internal vessels of the maxillary artery?
Vessels. The internal maxillary vessels, consisting of the maxillary artery originating from the external carotid artery and its branches. Infratemporal fossa. Internal maxillary branches found within the infratemporal fossa including the. middle meningeal artery.
What is the infratemporal fossa?
The infratemporal fossa is the space between the skull base, lateral pharyngeal wall, and the ramus of mandible . The fossa is actually open to the neck posteroinferiorly and in doing so has no true anatomical floor. The fossa communicates with the temporal fossa via the space deep to the zygomatic arch, with the pterygopalatine fossa via ...
How does the temporal fossa communicate with the temporal fossa?
The fossa communicates with the temporal fossa via the space deep to the zygomatic arch, with the pterygopalatine fossa via the pterygomaxillary fissure, and with the middle cranial fossa via the foraminae ovale and spinosum. The lateral pterygoid forms the foundation whereupon all other contents of the fossa are related.
Which pterygoid forms the foundation whereupon all other contents of the fossa are?
The lateral pterygoid forms the foundation whereupon all other contents of the fossa are related. The branches of the mandibular nerve and the attachments of the medial pterygoid lie deep to the lateral pterygoid while the maxillary artery lies superficial to it.
What is the ISBN for Imaging of the Head and Neck?
2. Imaging of the Head and Neck. Thieme. (2012) ISBN:3131505311. Read it at Google Books - Find it at Amazon
Where is the buccal branch of the mandibular nerve located?
Between the two heads of the lateral pterygoid emerges the buccal branch of the mandibular nerve. The lingual and inferior alveolar branches of the mandibular nerve lie below the inferior border of the lateral pterygoid.
What is the mandible part of?
Note that the mandible is the part of the fossa and forms its lateral wall. The list of terms: Fossa infratemporalis. – Infratemporal fossa . Ramus mandibulae. – Ramus of mandible. Foramen mandibulare. – Mandibular foramen. Arcus zygomaticus.
What is the Ramus mandibulae?
Ramus mandibulae. – Ramus of mandible. Lamina lateralis processus pterygoidei ossis sphenoidalis. – Lateral pterygoid plate of the sphenoid bone. The location of the infratemporal fossa relative to other structures of the skull base. Note that the mandible is the part of the fossa and forms its lateral wall.
Which point is missed out?
The point which usually is missed out is that the pterygopalatine fossa is the part of the fossa infratemporalis. Therefore the infratemporal fossa is directly bordered ( temporal fossa & basis cranii externa) or connects via openings ( basis cranii interna, orbit & nasal cavity) almost all other skull compartments.
Which fissure connects with the orbit?
inferior orbital fissure connects with the orbit. oval and spinous foramina connect with the intracranial cavity. sphenopalatine foramen connects with the nasal cavity. The latter is not observable directly, as it is in the deep of the pterygomaxillary fissure. The list of terms: Fossa infratemporalis.
