Cribriform plate

Cribriform plate
Bone: Cribriform plate
Gray149.png
Ethmoid bone from above.
Latin lamina cribrosa ossis ethmoidalis
Gray's subject #36 153

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 rooster'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.

Pathology

A fractured cribriform plate can result in cerebrospinal fluid leaking into the nose and loss of sense of smell.

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 As such, some of the information contained within it may be outdated.

v · d · eBones of head and neck: the neurocranium of the skull (TA A02.1.01–07, GA 2.129–155)
Occipital
Other
Parietal
Frontal
Ethmoidal notch · Fossa for lacrimal gland · Trochlear fovea · Frontal sinus · Frontonasal duct
Temporal
Sphenoid
Surfaces
fossae (Pterygoid, Scaphoid) · pterygoid plates (Lateral, Medial) · Pterygoid canal · Hamulus
Other
Ethmoid
Plates
Surfaces
Ethmoid sinus · ethmoidal foramina (Posterior, Anterior)

M: BON/CAR

anat(c/f/k/f, u, t/p, l)/phys/devp/cell

noco/cong/tumr, sysi/epon, injr

proc, drug(M5)

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Look at other dictionaries:

  • cribriform plate — n 1) the horizontal plate of the ethmoid bone perforated with numerous foramina for the passage of the olfactory nerve filaments from the nasal cavity called also lamina cribrosa 2) LAMINA DURA * * * see ethmoid bone * * * fascia cribrosa …   Medical dictionary

  • cribriform plate — noun : the horizontal plate of the ethmoid bone perforated with numerous foramina for the passage of the olfactory nerve filaments from the nasal cavity …   Useful english dictionary

  • cribriform plate — noun In the human skull, a sieve like region of the ethmoid bone (which separates the nasal cavity from the brain) …   Wiktionary

  • cribriform plate — see ethmoid bone …   The new mediacal dictionary

  • Кость Решетчатая (Ethmoid Bone, Cribriform Plate) — кость мо гового отдела черепа, которая входит в состав переднего отдела основания черепа и главным образом лицевого черепа, участвуя в образовании стенок глазниц и носовой полости. Решетчатая пластинка решетчатой кости (cribriform plate)… …   Медицинские термины

  • cribriform plate of ethmoid bone — lamina cribrosa ossis ethmoidalis …   Medical dictionary

  • Cribriform — Crib ri*form (kr?b r?f?rm), a. [L. cribrum sieve + form: cf. F. cribriforme.] Resembling, or having the form of, a sieve; pierced with holes; as, the cribriform plate of the ethmoid bone; a cribriform compress. [1913 Webster] {Cribriform cells}… …   The Collaborative International Dictionary of English

  • Cribriform cells — Cribriform Crib ri*form (kr?b r?f?rm), a. [L. cribrum sieve + form: cf. F. cribriforme.] Resembling, or having the form of, a sieve; pierced with holes; as, the cribriform plate of the ethmoid bone; a cribriform compress. [1913 Webster]… …   The Collaborative International Dictionary of English

  • Cribriform — (Latin for perforated ) can refer to: Cribriform plate Fascia cribrosa Cribriform mesenchyme This disambiguation page lists articles associated with the same title. If an internal link led you here …   Wikipedia

  • cribriform foramina — foramina cribrosa ossis ethmoidalis [TA] the openings in the cribriform plate of the ethmoid bone for passage of the olfactory nerves. Called also olfactory foramina …   Medical dictionary

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