What passes through the foramen spinosum?
The foramen spinosum (plural: foramina spinosa) is located in the posteromedial part of greater wing of sphenoid bone posterolateral to foramen ovale which connects the middle cranial fossa with the infratemporal fossa. It transmits the middle meningeal artery, middle meningeal vein, and (usually) the nervus spinosus.
Where is foramen spinosum?
The foramen spinosum is located in the skull base and transmits the middle meningeal artery and meningeal branch of the mandibular nerve [1]. It is also a passageway for the venous component that connects the cavernous sinus with the pterygoid venous plexus.
Where is maxillary artery?
The maxillary artery arises posterior to the mandibular neck, traverses the parotid gland, and passes forward between the sphenomandibular ligament and ramus of the mandible. It then runs a superficial course lateral to the lateral pterygoid muscle.
What is nervous Spinosum?
The nervus spinous (plural: nervi spinosi), also known as the meningeal branch of the mandibular nerve, is a branch of the mandibular division of the trigeminal nerve which innervates the dura of the middle cranial fossa.
What surrounds the Crista Galli?
The falx cerebri (a fold of the dura mater surrounding the brain) attaches to the crista galli. The olfactory bulbs of the olfactory nerve lie on either side of the crista galli on top of the cribriform plate.
Why foramen spinosum is called?
The foramen spinosum was first described by the Danish anatomist Jakob Benignus Winslow in the 18th century. It is so-named because of its relationship to the spinous process of the greater wing of the sphenoid bone.
What comes off the maxillary artery?
It passes through the sphenopalatine foramen and enters the nasal cavity. Here it gives off its posterior lateral nasal branches. Crossing the inferior surface of the sphenoid, the sphenopalatine artery ends on the nasal septum giving off the posterior septal branches.
What are Pterygoids?
Pterygoid muscles. The pterygoid muscles are two of the four muscles of mastication, located in the infratemporal fossa of the skull. These muscles are: lateral pterygoid and medial pterygoid. The primary function of the pterygoid muscles is to produce movements of the mandible at the temporomandibular joint.
What gives off the maxillary artery?
Branches from the 3rd (pterygopalatine) segment It passes through the sphenopalatine foramen and enters the nasal cavity. Here it gives off its posterior lateral nasal branches. Crossing the inferior surface of the sphenoid, the sphenopalatine artery ends on the nasal septum giving off the posterior septal branches.
What divides the maxillary artery?
The maxillary artery is divided into three portions by its relation to the lateral pterygoid muscle: first (mandibular) part: posterior to lateral pterygoid muscle (five branches) second (pterygoid or muscular) part: within lateral pterygoid muscle (five branches)
Why is it called foramen spinosum?