Items tagged “pm”
206 results found
Article
Anterior choroidal artery
The anterior choroidal artery (AChA) supplies several crucial anatomical structures of the brain important for vision and motor control. Identification of AChA is important because of its strategic and extensive area of supply as well as large variations in the territorial distribution.
Gross a...
Article
Splenial artery
The splenial artery (or posterior pericallosal artery) arises most commonly from the parieto-occipital branch of the posterior cerebral artery. It represents an important potential collateral supply from the posterior to anterior cerebral arteries via the pericallosal artery. When a sizable dire...
Article
Anterior ethmoidal foramen
The anterior ethmoid foramen is a small opening in the ethmoid bone. It is the anatomical border of the anterior and posterior ethmoid air cells. It transmits the anterior ethmoidal artery, vein and nerve.
The anterior ethmoid foramen is situated 25 mm away from the lacrimal crest, 12 mm anteri...
Article
Condylar canal
The condylar canal, or canalis condylaris, is a skull base canal in the posterior cranial fossa, located in the condylar fossa. It is the largest of the emissary foramina of the skull 1.
Summary
location: in the condylar fossa of the posterior cranial fossa, posterior to the occipital condyles...
Article
Foramen lacerum
The foramen lacerum (plural: foramina lacera) is a triangular opening located in the middle cranial fossa formed by the continuation of the petrosphenoidal and petroclival fissures. Thus, it is a gap between bones, alternatively termed the sphenopetroclival synchondrosis, rather than a true for...
Article
Foramen ovale (skull)
Foramen ovale (plural: foramina ovalia) is an oval shaped opening in the middle cranial fossa located at the posterior base of the greater wing of the sphenoid bone, lateral to the lingula and foramen lacerum, medial to foramen spinosum. It transmits the mandibular division of the trigeminal ner...
Article
Foramen rotundum
The foramen rotundum (plural: foramina rotunda) is located in the middle cranial fossa, inferomedial to the superior orbital fissure at the base of greater wing of the sphenoid bone. Its medial border is formed by lateral wall of sphenoid sinus. It runs downwards and laterally in an oblique path...
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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 (usuall...
Article
Cribriform plate
The cribriform plate (less commonly also called the lamina cribrosa of the ethmoid bone) is a sieve-like structure between the anterior cranial fossa and the nasal cavity. It is a part of ethmoid bone and supports the olfactory bulb, which lies in the olfactory fossa. It is perforated by foramin...
Article
Stylomastoid foramen
The stylomastoid foramen is a rounded opening at the inferior end of the facial canal. It is located on the inferior surface of the petrous temporal bone, between the base of the styloid process and the mastoid process of the temporal bone. It transmits the facial nerve and stylomastoid artery (...
Article
Sphenopalatine foramen
The sphenopalatine foramen connects the nasal cavity and the pterygopalatine fossa, transmitting the nasopalatine nerve, posterior superior nasal nerves, and sphenopalatine artery and vein.
Gross anatomy
It is formed at the junction of the sphenopalatine incisure (palatine bone) with the sphen...
Article
Greater palatine foramen
The greater palatine foramen is the opening in the posterior hard palate of the greater palatine canal, which is formed between the articulation of maxillary bone and the greater palatine sulcus of palatine bone. The canal is also known as the pterygopalatine canal. A small accessory canal branc...
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Incisive foramen
The incisive foramen (also known as nasopalatine foramen or anterior palatine foramen) is the oral opening of the nasopalatine canal. It is located in the maxilla in the incisive fossa, midline in the palate posterior to the central incisors, at the junction of the medial palatine and incisive s...
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Inferior orbital fissure
The inferior orbital fissure (IOF) lies in the floor of the orbit inferior to the superior orbital fissure and it is bounded superiorly by the greater wing of sphenoid, inferiorly by maxilla and orbital process of palatine bone and laterally by the zygomatic bone. It opens into posterolateral as...
Article
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 si...
Article
Lesser palatine foramina
The lesser palatine foramina are 2 small foramina representing the openings in the hard palate of the lesser palatine canal (which is a small accessory canal arising form the greater palatine canal). They are located in the posterior palatine bone posterior to the greater palatine foramen and po...
Article
Mastoid foramen
The mastoid foramen is a variably-present foramen as well as being variable in its size, number and position. Most commonly, it is located near the posterior margin of the mastoid process, within the temporo-occipital suture.
Epidemiology
According one publication the prevalence was as follows...
Article
Optic canal
The optic canal is a cylindrical canal running obliquely through the lesser wing of sphenoid bone near the base where it joins the body of sphenoid. It transmits the optic nerve and ophthalmic artery (and its associated sympathetic fibers). The optic canal opens into the skull base at the optic ...
Article
Pterygomaxillary fissure
The pterygomaxillary fissure is a triangular shaped lateral opening of pterygopalatine fossa.
Gross anatomy
It is located in the medial aspect of the temporal fossa and is formed by the divergence of the maxilla from the lateral pterygoid plate of the sphenoid bone 3. It connects the infratemp...
Article
Infratemporal fossa
The infratemporal fossa is a complex space of the face that lies posterolateral to the maxillary sinus, below the skull base, and between the pharyngeal sidewall and mandibular ramus. It overlaps with the masticator space and prestyloid parapharyngeal space.
Gross anatomy
The infratemporal fos...
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