Anatomy 2 - Skull Foramina
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What is the foramen caecum, and what passes through it?
The frontal crest of the frontal bone ends below in a small notch which is converted into a foramen, the foramen cecum (or foramen caecum), by articulation with the ethmoid.
The emissary vein passes through it.
What is the cribriform plate?
- The cribriform plate of the ethmoid bone
- (horizontal lamina) is received into the ethmoidal notch of the frontal bone and roofs in the nasal cavities.
The Olfactory Nerve (Cranial Nerve 1) passes through it.
What is the optic canal?
The optic foramen is the opening to the optic canal.
The optic nerve (cranial nerve 2) and the ophthalmic artery pass though this.
What is the superior orbital fissure?
The superior orbital fissure is a foramenin the skull, although strictly it is more of a cleft, lying between the lesser and greater wings of the sphenoid bone.
The oculomotor nerve (3) the trochlear nerve (4), The ophthalmic division of the trigeminal nerve (5) [frontal/nasociliary/lacrimal], and the adbucent nerve (6) pass through this.
What is the foramen rotundum?
The foramen rotundum is a circular hole in thesphenoid bone that connects the middle cranial fossa and the pterygopalatine fossa.
The maxiallary division of the trigeminal nerve (5) passes through this
What is the foramen ovale?
At the base of the skull the foramen ovale (Latin: oval window) is one of the larger of the several holes (the foramina) that transmit nerves through the skull. The foramen ovale is situated in the posterior part of the sphenoid bone, posterolateral to the foramen rotundum.
The mandibular division of the trigeminal nerve (5) passes through this.
What is the foramen spinosum?
The foramen spinosum is one of two foraminalocated in the base of the human skull, on thesphenoid bone. It is situated just anterior to the spine of the sphenoid bone, and just lateral to theforamen ovale.
The middle meningeal artery,middle meningeal vein, and the meningeal branch of the mandibular nerve pass through the foramen.
What is the foramen lacerum?
The foramen lacerum (Latin for lacerated piercing) is a triangular hole in the base of theskull located between the sphenoid, apex of petrous temporal and basilar part of occipital.
- A plug of cartilage and fibrous tissue passes through this.
What is the carotid canal?
The carotid canal is the passage way in thetemporal bone through which the internal carotid artery enters the middle cranial fossa from the neck.
The internal carotid artery passes through this.
What is the internal acoustic meatus?
The internal auditory meatus (also meatus acusticus internus, internal acoustic meatus,internal auditory canal, internal acoustic canal, or IAC) is a canal in the petrous part of the temporal bone of the skull, on each side, and serves as the passageway for the cranial nerves.
The facial nerve (7), the vestibulocochlear nerve (8) and the labyrinthine artery run through this.
What is the jugular foramen?
The jugular foramen is a large aperture in thebase of the skull. It is located behind the carotid canal and is formed in front by the petrous portion of the temporal, and behind by the occipital;
The glossopharyngeal nerve (9), the vagus nerve (10), the accessory nerve (11) and the internal jugular vein pas through this.
What is the hypoglossal canal?
The hypoglossal canal is a bony canal in the occipital bone of the skull.
The hypoglossal nerve (12) passes through this.
What is the mandibular canal?
In human anatomy, the mandibular canal is a canal within the mandible that contains the inferior alveolar nerve, inferior alveolar artery, and inferior alveolar vein.
What is the mental foramen?
The mental foramen is one of two holes ("foramina") located on the anterior surface of themandible. It permits passage of the mental nerve and vessels.
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