Ethmoid bone

Jump to navigation Jump to search

Template:Infobox Bone

WikiDoc Resources for Ethmoid bone


Most recent articles on Ethmoid bone

Most cited articles on Ethmoid bone

Review articles on Ethmoid bone

Articles on Ethmoid bone in N Eng J Med, Lancet, BMJ


Powerpoint slides on Ethmoid bone

Images of Ethmoid bone

Photos of Ethmoid bone

Podcasts & MP3s on Ethmoid bone

Videos on Ethmoid bone

Evidence Based Medicine

Cochrane Collaboration on Ethmoid bone

Bandolier on Ethmoid bone

TRIP on Ethmoid bone

Clinical Trials

Ongoing Trials on Ethmoid bone at Clinical

Trial results on Ethmoid bone

Clinical Trials on Ethmoid bone at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Ethmoid bone

NICE Guidance on Ethmoid bone


FDA on Ethmoid bone

CDC on Ethmoid bone


Books on Ethmoid bone


Ethmoid bone in the news

Be alerted to news on Ethmoid bone

News trends on Ethmoid bone


Blogs on Ethmoid bone


Definitions of Ethmoid bone

Patient Resources / Community

Patient resources on Ethmoid bone

Discussion groups on Ethmoid bone

Patient Handouts on Ethmoid bone

Directions to Hospitals Treating Ethmoid bone

Risk calculators and risk factors for Ethmoid bone

Healthcare Provider Resources

Symptoms of Ethmoid bone

Causes & Risk Factors for Ethmoid bone

Diagnostic studies for Ethmoid bone

Treatment of Ethmoid bone

Continuing Medical Education (CME)

CME Programs on Ethmoid bone


Ethmoid bone en Espanol

Ethmoid bone en Francais


Ethmoid bone in the Marketplace

Patents on Ethmoid bone

Experimental / Informatics

List of terms related to Ethmoid bone

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


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.


The ethmoid bone consists of four parts:


The ethmoid articulates with fifteen bones:


The ethmoid bone is very delicate and is easily injured by a sharp upward blow to the nose, such as a person might suffer by striking an automobile dashboard in a collision. The force of a blow can drive bone fragments through the cribiform plate into the meninges or brain tissue. Such injuries are often evidenced by leakage of cerebrospinal fluid into the nasal cavity, and may be followed from the nasal cavity to the brain.

Sagittal section of the skull. Ethmoid bone is labeled with white

Blows to the head can also shear off the olfactory nerves that pass though the ethmoid bone and cause anosmia, an irreversible loss of the sense of smell and a great reduction in the sense of taste (most of which depends on smell). This not only deprives life of some of its pleasures, but can also be dangerous, as when a person fails to smell smoke, gas, or spoiled food.

Fracture of the lamina papyracea, the lateral plate of the ethmoid labyrinth bone, permits communication between the nasal cavity and the ipsilateral orbit through the inferomedial orbital wall, resulting in orbital emphysema. Increased pressure within the nasal cavity, as seen during sneezing, for example, leads to temporary exophthalmos.

Role in magnetoception

Some birds and other migratory animals have deposits of biological magnetite in their ethmoid bones which allow them to sense the direction of the Earth's magnetic field. Humans have a similar magnetite deposit, but it is believed to be vestigial. [2]

Additional images

See also

External links

Template:Gray's Template:OrbitalBones Template:Cranium

ar:عظم غربالي ca:Etmoide de:Siebbein it:Osso etmoide lv:Sietiņkauls lt:Akytkaulis nl:Zeefbeen simple:Ethmoid bone sl:Sitka uk:Ґратчаста кістка

Template:WikiDoc Sources