Where Is The Pterygopalatine Fossa Located?

The pterygopalatine fossa contains fat and the following neurovascular structures: pterygopalatine ganglion. maxillary artery (terminal portion), and its branches including the descending palatine artery. emissary veins.

What exits the pterygopalatine fossa?

The main trunk of the maxillary nerve leaves the pterygopalatine fossa via the infraorbital fissure. Here, it enters the infraorbital canal of the maxilla and exits below the orbit in the infraorbital foramen to contribute to the sensory innervation of the face (figures 2.0 & 2.1).

How big is the pterygopalatine fossa?

The pterygopalatine fossa can be assimilated to an inverted square-based pyramid. Its size varies depending on the development of the maxillary and sphenoid sinuses and is approximately 2 cm in height and 1 cm at the base.

What are the openings of the Pterygopalatine fossa?

The posterior wall of the pterygopalatine fossa has several openings such as the foramen rotundum, the pterygoid canal and the pharyngeal canal. The foramen rotundum forms a communication between the middle cranial fossa and the pterygopalatine fossa and it conducts only one structure – the maxillary nerve.

What is pterygopalatine?

The pterygopalatine (sphenopalatine) ganglion is one of four small parasympathetic ganglia found in the head. … Although it is described as being a parasympathetic ganglion, it also carries sympathetic and sensory fibers to the nasal, oral and pharyngeal regions of the head.

Where does the maxillary artery enter the Pterygopalatine fossa?

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 …

What is the function of the Pterygopalatine fossa?

The pterygopalatine fossa (PPF) is a small, clinically inaccessible, fat-filled space located in the deep face that serves as a major neurovascular crossroad between the oral cavity, nasal cavity, nasopharynx, orbit, masticator space, and the middle cranial fossa.

What are the pterygopalatine nerves?

The pterygopalatine ganglion gives rise to the following nerves: the nasopalatine nerve, the lesser palatine nerve, the greater palatine nerve, the posterior superior lateral nasal nerves, the posterior inferior lateral nasal nerves, and pharyngeal nerve.

What is scaphoid fossa?

Medical Definition of scaphoid fossa

: a shallow oval depression that is situated above the pterygoid fossa on the pterygoid process of the sphenoid bone and that provides attachment for the origin of the tensor veli palatini muscle.

What lies in pterygoid fossa?

The lateral and medial pteryoid plates (of the pterygoid process of the sphenoid bone) diverge behind and enclose between them a V-shaped fossa, the pterygoid fossa. This fossa faces posteriorly, and contains the medial pterygoid muscle and the tensor veli palatini muscle.

What is Pterygomaxillary fossa?

The pterygomaxillary fossa is found posterior to the maxillary sinus and inferior to the sphenoid bone and orbital process of the palatine bone. It is lateral to the perpendicular plate of the palatal bone and anterior to the base of the pterygoid process and to the anterior surface of the greater wing of the sphenoid.

What structure communicates the infratemporal fossa with 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 forms the pterygopalatine ganglion?

The PPG is the largest of the peripheral parasympathetic ganglia. It is formed by the cell bodies of postganglionic parasympathetic neurons and resides in the PPF just below the maxillary nerve to which it connects by short ganglionic branches.

What passes through the Pterygomaxillary fissure?

The pterygomaxillary fissure transmits the posterior superior alveolar nerve, a branch of maxillary division of the trigeminal nerve from the pterygopalatine fossa to the infratemporal fossa. Terminal branches of the maxillary artery also enter the fissure.

What is Infraorbital foramen?

The infraorbital foramen is located in the maxillary bone. It is the anterior opening of the infraorbital canal, which is the anterior continuation of the infraorbital groove, which course through the floor of the orbit. The canal may reside entirely in the maxillary sinus, suspended from the sinus roof by a mesentery.

What passes through inferior orbital fissure?

It transmits the: infra-orbital nerve (from the maxillary division of trigeminal nerve) zygomatic nerve (from the maxillary division of trigeminal nerve) a branch of the inferior ophthalmic vein and several emissary veins connecting it to the pterygoid venous plexus.

What passes through the Vidian Canal?

It transmits the nerve of pterygoid canal, (Vidian nerve), the artery of the pterygoid canal (Vidian artery), and the vein of the pterygoid canal (Vidian vein).

What goes through the infratemporal fossa?

The following anatomical structures pass through the infratemporal fossa: the temporalis muscle. the lateral pterygoid muscle. … the pterygoid venous plexus.

Where is the otic ganglion?

The otic ganglion is a small peripheral parasympathetic ganglion residing immediately below the foramen ovale. It is related topographically to the mandibular nerve but is functionally related to the glossopharyngeal nerve.

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