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Information about Cribiform Plate

Bone:
Ethmoid bone from above.
Latinlamina cribrosa ossis ethmoidalis
subject #36 153
Dorlands/Elsevier l_02/12476029
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.

Projecting upward from the middle line of this plate is a thick, smooth, triangular process, the crista galli, so called from its resemblance to a cock's comb.

The long thin posterior border of the crista galli serves for the attachment of the falx cerebri.

Its anterior border, short and thick, articulates with the frontal bone, and presents two small projecting alæ, which are received into corresponding depressions in the frontal bone and complete the foramen cecum.

Its sides are smooth, and sometimes bulging from the presence of a small air sinus in the interior.

On either side of the crista galli, the cribriform plate is narrow and deeply grooved; it supports the olfactory bulb and is perforated by foramina for the passage of the olfactory nerves. The foramina in the middle of the groove are small and transmit the nerves to the roof of the nasal cavity; those at the medial and lateral parts of the groove are larger—the former transmit the nerves to the upper part of the nasal septum, the latter those to the superior nasal concha.

At the front part of the cribriform plate, on either side of the crista galli, is a small fissure which is occupied by a process of dura mater.

Lateral to this fissure is a notch or foramen which transmits the nasociliary nerve; from this notch a groove extends backward to the anterior ethmoidal foramen.

Additional images


Base of the skull. Upper surface.

Roof, floor, and lateral wall of left nasal cavity.

Nerves of the orbit. Seen from above.


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 As such, some of the information contained herein may be outdated.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
The ethmoid bone (from Greek ethmos, "sieve") is a bone in the skull that separates the nasal cavity from the brain. As such, it is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction.
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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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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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The ethmoid bone (from Greek ethmos, "sieve") is a bone in the skull that separates the nasal cavity from the brain. As such, it is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction.
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The nasal cavity (or nasal fossa) is a large air-filled space above and behind the nose in the middle of the face.

Function

The nasal cavity conditions the air to be received by the areas of the respiratory tract.
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In anatomy, a process (Latin: processus) is a projection or outgrowth of tissue from a larger body.

Examples

Examples of processes include:
  • the mastoid process
  • the xyphoid process

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The crista galli (Latin: "crest of the cock") is a median ridge of bone that projects from the cribriform plate of the ethmoid bone.

It is where the falx cerebri attaches anteriorly to the skull.
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rooster, cock or cockerel is a male chicken (Gallus gallus), the female being a hen. The original term is "cock", from Old English cocc, but this term tends to be avoided these days due to its use in sexual slang.
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The falx cerebri, so named from its sickle-like form, is a strong, arched fold of dura mater which descends vertically in the longitudinal fissure between the cerebral hemispheres.
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Ala may refer to:
  • Ala (demon), a female demon in the Serbian and Bulgarian mythology.
  • Ala (mythology), a goddess in the Igbo mythology.
  • Latin for "wing":
  • Ala (brachiopod), a brachiopod genus with prominent "wings".

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Foramen cecum (from the Latin meaning blind) can refer to:
  • Foramen cecum (frontal bone)
  • Foramen cecum (tongue)
  • Foramen cecum (medulla oblongata)

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The olfactory bulb is a structure of the vertebrate forebrain involved in olfaction, the perception of odors.

Anatomy

In most vertebrates, the olfactory bulb is the most rostral (forward) part of the brain.
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In anatomy, a foramen is any opening.

Examples

Skull

See Foramina of skull

Other

  • the apical foramen is the hole at the tip of the root of a tooth.
  • the foramen ovale (heart) is a hole between the venous and arterial sides of the fetal heart.

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A nerve is an enclosed, cable-like bundle of axons (the long, slender projection of a neuron). Neurons are sometimes called nerve cells, though this term is technically imprecise since many neurons do not form nerves, and nerves also include the glial cells that
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The nasal septum separates the left and right airways in the nose, dividing the two nostrils.

It is depressed by the Depressor septi nasi muscle.

Composition

The fleshy external end of the nasal septum is sometimes also called columella.
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superior nasal concha.

See also

  • Nasal concha

Additional images



Ethmoid bone from the right side.

Horizontal section of nasal and orbital cavities.

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The dura mater (from the Latin "hard mother"), or pachymeninx, is the tough and inflexible outermost of the three layers of the meninges surrounding the brain and spinal cord. (The other two meningeal layers are the pia mater and the arachnoid mater.
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The nasociliary nerve is a branch of the ophthalmic nerve. It is intermediate in size between the two other main branches of the ophthalmic nerve, the frontal nerve and the lacrimal nerve, and is more deeply placed.
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Medical University of Vienna , formerly the faculty of medicine of the University of Vienna, became an independent university on January 1, 2004. The independence of medical schools from the structure of "general" universities was part of a larger reform of the Austrian university
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eMedicine is an online clinical medical knowledge base that was founded in 1996 by Scott Plantz and Richard Lavely, two medical doctors. It was sold to WebMD in January 2006.
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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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