Anterior ethmoidal foramen

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Bone: Anterior ethmoidal foramen
File:Foramen ethmoidale anterius.PNG
Base of the skull. Upper surface. (On the left, "Anterior ethmoidal foramen" is the 7th label from the right.)

1 Foramen ethmoidale, 2 Canalis opticus, 3 Fissura orbitalis superior, 4 Fossa sacci lacrimalis, 5 Sulcus infraorbitalis, 6 Fissura orbitalis inferior, 7 Foramen infraorbitale
Latin	foramen ethmoidale anterius
Gray's	subject #47 190
Dorlands / Elsevier	f_12/12373034

Lateral to either olfactory groove are the internal openings of the anterior and posterior ethmoidal foramina (or canals).

The anterior ethmoidal foramen, situated about the middle of the lateral margin of the olfactory groove, transmits the anterior ethmoidal vessels and the nasociliary nerve; the nerve runs in a groove along the lateral edge of the cribriform plate to the slit-like opening above mentioned.

Additional images

Frontal bone. Inner surface.
Left maxillary sinus opened from the exterior.
The ophthalmic artery and its branches.

External links

Norman/Georgetown lesson3 (orbitforamina) (#5)

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e

Bones of head and neck: the cranium of the skull

Occipital

Squama	external (Inion/External occipital protuberance, Nuchal lines) - planes (Occipital, Nuchal) - internal (Cruciform eminence, Internal occipital protuberance, Sagittal sulcus, Internal occipital crest)
Lateral parts	Condyle (Condyloid fossa, Condylar canal) - Hypoglossal canal - jugular (Jugular process, Jugular tubercle)
Basilar part	Pharyngeal tubercle
Other	Foramen magnum

Parietal

Parietal eminence - Temporal line - Parietal foramen

Frontal

Squama	Frontal suture - Frontal eminence - external (Superciliary arches, Glabella) - foramina (Supraorbital, Cecum) - Zygomatic process - internal (Sagittal sulcus, Frontal crest)
Orbital part	Ethmoidal notch - Lacrimal fossa - Trochlear fovea - Frontal sinus - Frontonasal duct

Temporal

Squama	Articular tubercle - Suprameatal triangle - Mandibular fossa - Petrotympanic fissure - Zygomatic process
Mastoid part	Mastoid foramen - Mastoid process (Mastoid cells) - Mastoid notch - Occipital groove - Sigmoid sulcus - Mastoid antrum (Entrance)
Petrous part	Carotid canal - Facial canal (Hiatus) - Internal auditory meatus - Aqueduct of cochlea - Stylomastoid foramen fossae (Subarcuate fossa, Jugular fossa) - canaliculi (Inferior tympanic, Mastoid) - Styloid process - Petrosquamous suture (note: ossicles in petrous part, but not part of temporal bone)
Tympanic part	Suprameatal spine

Sphenoid

Surfaces	Superior surface: Sella turcica (Dorsum sellae, Tuberculum sellae, Hypophysial fossa, Posterior clinoid processes) - Ethmoidal spine - Chiasmatic groove - Middle clinoid process - Petrosal process - Clivus Lateral surface: Carotid groove - Sphenoidal lingula Anterior surface: Sphenoidal sinuses
Great wings	foramina (Rotundum, Ovale, Vesalii, Spinosum) - Spine - Infratemporal crest - Sulcus for auditory tube
Small wings	Superior orbital fissure - Anterior clinoid process - Optic canal
Pterygoid processes	fossae (Pterygoid, Scaphoid) - pterygoid plates (Lateral, Medial) - Pterygoid canal - Hamulus
Other	Body - Sphenoidal conchae

Ethmoid

Plates	Cribriform plate (Crista galli, Olfactory foramina) - Perpendicular plate
Surfaces	Lateral surface Orbital lamina - Uncinate process Medial surface Superior nasal concha - Superior meatus - Middle nasal concha - Middle meatus
Labyrinth	Ethmoid sinus - ethmoidal foramina (Posterior, Anterior)

v • d • e Foramina of the skull (and canals, fissures, meati, and hiati)
Anterior cranial fossa	to Orbit: ethmoidal foramina (anterior, posterior) to Nasal cavity: olfactory foramina (CN-I) - foramen cecum
Middle cranial fossa	to Orbit: optic canal (CN-II) - superior orbital fissure (CN-III,IV,V1,VI) to Pterygopalatine fossa: foramen rotundum (CN-V2) - pterygoid canal to Infratemporal fossa: foramen ovale (CN-V3) - foramen spinosum/carotid canal other: foramen lacerum - hiatus for greater petrosal nerve - hiatus for lesser petrosal nerve - sphenoidal emissary foramen
Posterior cranial fossa	internal auditory meatus/facial canal/stylomastoid foramen (CN-VII,VIII) - jugular foramen (CN-IX,X,XI) - foramen magnum (CN-XI) - hypoglossal canal (CN-XII) - condylar canal - mastoid foramen
Orbit	to Nasal cavity: nasolacrimal canal to Face: supraorbital (notch, foramen) - infraorbital (foramen, groove) - zygomatic foramen (-facial, -temporal) to Pterygopalatine fossa: inferior orbital fissure
Pterygopalatine fossa	to Nasal cavity: sphenopalatine foramen to Oral cavity: greater palatine canal/greater palatine foramen - lesser palatine canals/lesser palatine foramina to Infratemporal fossa: pterygomaxillary fissure to Nasopharynx: palatovaginal canal
Nasal cavity	to Oral cavity: incisive canals - incisive foramen
Other	external acoustic meatus - mandibular foramen - mental foramen - parietal foramen - petrotympanic fissure - semilunar hiatus