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Information about Optic Foramen

Bone: Optic foramen
1: Foramen ethmoidale
2: Canalis opticus
3: Fissura orbitalis superior
4: Fossa sacci lacrimalis
5: Sulcus infraorbitalis
6: Fissura orbitalis inferior
7: Foramen infraorbitale
Base of the skull. Upper surface. (On the left, "Optic foramen" is the 12th label from the top.
Latinforamina optica
subject #35 147
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.

The optic foramen is the opening to the optic canal.

The left and right optic canals are 25mm apart posteriorly and 30mm apart anteriorly. They are funnel-shaped (narrowest anteriorly).

Additional images


The seven bones which articulate to form the orbit.

Sphenoid bone. Upper surface.

Medial wall of left orbit.

Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure.


See also

External links

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 As such, some of the information contained herein may be outdated.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.
Human cranial bones
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occipital bone: Foramen magnum | Squama occipitalis (Inion | Nuchal lines | Planum occipitale | Planum nuchale | Internal occipital protuberance | Sagittal sulcus | Internal occipital crest) | Lateral parts (Hypoglossal canal | Condyloid fossa | Condyloid canal | Jugular process | Jugular tubercle) | Basilar part (Pharyngeal tubercle) parietal bone: Parietal eminence | Temporal line | Parietal foramen frontal bone: Squama frontalis (Frontal suture | Frontal eminence | Superciliary arches | Glabella | Supraorbital foramen | Zygomatic process | Sagittal sulcus | Frontal crest | Foramen cecum) | Pars orbitalis (Frontal sinus | Frontonasal duct) temporal bone: Squama temporalis (Articular tubercle | Suprameatal triangle | Mandibular fossa | Petrotympanic fissure) | Mastoid portion (Mastoid foramen | Mastoid process | Mastoid notch | Occipital groove | Sigmoid sulcus | Mastoid antrum) | Petrous portion (Hiatus of the facial canal | Internal auditory meatus | Subarcuate fossa | Carotid canal | Aqueduct of cochlea | Jugular fossa | Inferior tympanic canaliculus | Mastoid canaliculus | Styloid process | Stylomastoid foramen | Jugular foramen | Petrosquamous suture) | Tympanic part (Suprameatal spine) | Zygomatic process sphenoid bone: Sphenoidal sinuses | Ethmoidal spine | Optic foramen | Sella turcica | Fossa hypophyseos | Dorsum sellae | Posterior clinoid processes | Carotid groove | Lingula sphenoidalis | Sphenoidal conchæ | Great wings (Spina angularis | Foramen rotundum | Foramen ovale | Foramen Vesalii | Foramen spinosum | Infratemporal crest | Sulcus tubae auditivae | Small wings | Superior orbital fissure | Anterior clinoid process | Optic foramen) | Pterygoid processes (Pterygoid fossa | Scaphoid fossa | Lateral pterygoid plate | Medial pterygoid plate | Pterygoid hamulus | Sphenoidal conchæ | Sphenoidal sinuses) ethmoid bone: Cribriform plate | Crista galli | Perpendicular plate | Labyrinth | Ethmoid sinus | Uncinate process | Middle nasal concha | Superior meatus | Superior nasal concha | Middle meatus
Facial bones
maxilla: Incisive fossa | Maxillary sinus | Incisive fossa | Canine fossa | Infraorbital foramen | Anterior nasal spine | Alveolar canals | Orbitofrontal cortex | Infraorbital canal | Pterygopalatine canal | Zygomatic process | Agger nasi | Anterior lacrimal crest | Alveolar process | Incisive foramen | Incisive canals | Foramina of Scarpa | Premaxilla | Anterior nasal spine lacrimal bone: Posterior lacrimal crest zygomatic bone: Zygomaticofacial foramen | Zygomaticotemporal foramen | Zygomaticoörbital foramina palatine bone: Pterygopalatine fossa | Pterygoid fossa | Horizontal plate | Posterior nasal spine | Perpendicular plate | Pterygopalatine canal | Sphenopalatine foramen | Pyramidal process | Orbital process | Sphenoidal process mandible: Symphysis menti | Mental foramen | Mylohyoid line | Ramus mandibulae | Mandibular foramen | Mandibular canal others: nasal bone | inferior nasal conchae | vomer bone
composite structures
Cranial sutures: Coronal | Lambdoidal | Occipitomastoid | Parietomastoid | Sphenofrontal | Sphenoparietal |Sphenosquamosal | Sphenozygomatic |Squamosal | Zygomaticotemporal | Zygomaticofrontal | Frontal/Metopic | Sagittal | Frontoethmoidal | Petrosquamous | Sphenoethmoidal | Sphenopetrosal Asterion | Nasion | Pterion | Dacryon | Inferior orbital fissure
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Foramina of the skull (and canals and fissures)
Foraminacecum - ethmoidal (anterior, posterior) - incisive - jugular - lacerum - magnum - mandibular - mastoid - mental - optic - orbital (infraorbital, supraorbital) - ovale - palatine (greater, lesser) - parietal - rotundum - sphenopalatine - spinosum - stylomastoid - zygomaticofacial - zygomaticotemporal
Canalscarotid - condylar - hypoglossal - incisive - pterygoid
Fissuresorbital (inferior, superior) - petrotympanic
otherexternal acoustic meatus - internal acoustic meatus - cribriform plate
Ethmoidal foramina can refer to:
  • anterior ethmoidal foramen
  • posterior ethmoidal foramen

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The superior orbital fissure is a foramen in the skull, although strictly it is more of a cleft, lying between the lesser and greater wings of the sphenoid bone.

Structures passing through


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Near the middle of the posterior part of the orbital surface of the maxilla is the infraorbital groove (or sulcus), for the passage of the infraorbital vessels and nerve.
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The lateral wall and the floor of the orbit are separated posteriorly by the inferior orbital fissure which transmits the maxillary nerve and its zygomatic branch, the infraorbital vessels, and the ascending branches from the sphenopalatine ganglion.
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infraorbital foramen, the end of the infraorbital canal; it transmits the infraorbital artery, vein, and infraorbital nerve.

External links

  • Norman/Georgetown cranialnerves ( V )
  • SUNY Labs 29:os-0506 (closeup)
  • SUNY Figs

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Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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The sphenoid bone (from Greek sphenoeides, "wedgelike") is a bone situated at the base of the skull in front of the temporals and basilar part of the occipital bone.

The sphenoid bone somewhat resembles a butterfly or bat with its wings extended.
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Optic Nerve may be a reference to:
  • Optic nerve, the anatomical structure;
  • Optic Nerve (comic), the comic book series;
  • Optic Nerve (1998), the seminal release from the Irish hip hop act known as Exile Eye; or

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The ophthalmic artery is a branch of the internal carotid artery which supplies branches to supply the eye and other structures in the orbit.

Branches

The branches of the ophthalmic artery are often subdivided into an orbital group and an ocular group [1] .
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In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated.

It can also mean the skin which surrounds the eye of a bird.

In the adult human, the volume of the orbit is 30 ml, of which the eye occupies 6.5 ml.
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The sphenoid bone (from Greek sphenoeides, "wedgelike") is a bone situated at the base of the skull in front of the temporals and basilar part of the occipital bone.

The sphenoid bone somewhat resembles a butterfly or bat with its wings extended.
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bone location foramen vessels nerves
frontal - supraorbital foramen supraorbital artery, supraorbital vein supraorbital nerve
frontal anterior cranial fossa foramen cecum emissary veins to superior sagittal sinus -
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The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City.
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University of Michigan, Ann Arbor (U of M, UM or simply Michigan) is a coeducational public research university in the state of Michigan. The university was founded in 1817 in Detroit, about 20 years before the territory of Michigan officially became a state,
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The Pennsylvania State University (commonly known as Penn State) is a state-related, land-grant university. The University has 24 campuses throughout the U.S. state of Pennsylvania, including a virtual World Campus.
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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skull is normally made up of 22 bones. Except for the mandible, all of the bones of the skull are joined together by sutures, synarthrodial (immovable) joints formed by bony ossification, with Sharpey's fibres permitting some flexibility.
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The occipital bone, a saucer-shaped membrane bone situated at the back and lower part of the cranium, is trapezoid in shape and curved on itself. It is pierced by a large oval aperture, the foramen magnum, through which the cranial cavity communicates with the vertebral canal.
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In anatomy, in the occipital bone, the foramen magnum (Latin: 'great hole') is one of the several oval or circular apertures in the base of the skull (the foramina), through which the medulla oblongata (an extension of the spinal cord) enters and exits the skull vault.
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The squama of the occipital bone, situated above and behind the foramen magnum, is curved from above downward and from side to side.

External surface

The external surface
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The inion is the most prominent projection of the occipital bone at the lower rear part of the skull. The ligamentum nuchae and trapezius muscle attach to it.

The term external occipital protuberance (protuberantia occipitalis externa
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The nuchal lines are four curved lines on the external surface of the occipital bone:
  • The upper, often faintly marked, is named the highest nuchal line, and to it the galea aponeurotica is attached.

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planum occipitale (or occipital plane), and is covered by the Occipitalis muscle.

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.
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planum nuchale (or nuchal plane), is rough and irregular for the attachment of several muscles.

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.
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internal occipital protuberance.

See also

  • external occipital protuberance

External links

  • Roche Lexicon - illustrated navigator, at Elsevier 34257.000-2
  • Diagram at uni-mainz.

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sagittal sulcus, the edges of which unite below to form a ridge, the frontal crest; the sulcus lodges the superior sagittal sinus, while its margins and the crest afford attachment to the falx cerebri.

It also is part of the parietal, and occipital bones.
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internal occipital crest; it bifurcates near the foramen magnum and gives attachment to the falx cerebelli; in the attached margin of this falx is the occipital sinus, which is sometimes duplicated.
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occipital bone: Foramen magnum | Squama occipitalis (Inion | Nuchal lines | Planum occipitale | Planum nuchale | Internal occipital protuberance | Sagittal sulcus | Internal occipital crest) | Lateral parts (Hypoglossal canal | Condyloid fossa | Condyloid canal | Jugular process |
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The hypoglossal canal is a bony canal in the occipital bone of the skull that transmits the hypoglossal nerve from its point of entry near the medulla oblongata to its exit from the base of the skull near the jugular foramen.
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