Crista galli

Upper part of the ethmoid bone of the skull

Crista galli
Ethmoid bone from above.
Ethmoid bone from behind.
Details
Part of	Perpendicular plate of the ethmoid bone
System	Skeletal
Identifiers
Latin	crista galli
TA98	A02.1.07.004
TA2	724
FMA	57442
Anatomical terms of bone [edit on Wikidata]

The crista galli (Latin: "crest of the rooster") is a wedge-shaped, vertical, midline upward continuation of the perpendicular plate of the ethmoid bone of the skull,^[1] projecting above the cribriform plate^[2] into the cranial cavity. It serves as an attachment for the membranes surrounding the brain.^[1]

Structure

Attachments

The falx cerebri (a fold of the dura mater surrounding the brain) attaches to the crista galli.^{[citation needed]}

Relations

The olfactory bulbs of the olfactory nerve lie on either side of the crista galli on top of the cribriform plate.^{[citation needed]}

Variation

The base of crista galli varies in height.^[2] A bifid crista galli may suggest intracranial extension of a nasal dermoid cyst.^[3]

References

^ ^a ^b Fehrenbach, Margaret J.; Herring, Susan W. (2017). Illustrated Anatomy of the Head and Neck (5th ed.). St. Louis: Elsevier. p. 57. ISBN 978-0-323-39634-9.
^ ^a ^b Hajiioannou, Jiannis; Owens, David; Whittet, Heikki B. (2010). "Evaluation of anatomical variation of the crista galli using computed tomography". Clinical Anatomy. 23 (4): 370–373. doi:10.1002/ca.20957. ISSN 1098-2353. PMID 20196125. S2CID 12865173.
^ Clark, W. D.; Bailey, B. J.; Stiernberg, C. M. (February 1985). "Nasal dermoid with intracranial involvement". Otolaryngology–Head and Neck Surgery. 93 (1): 102–104. doi:10.1177/019459988509300121. ISSN 0194-5998. PMID 3920605. S2CID 12407939.

External links

MedEd at Loyola Radio/curriculum/ENT/jay84a.jpg
Floor of the cranial cavity (close-up)^{[dead link]} - BioWeb at University of Wisconsin System
"Anatomy diagram: 34257.000-2". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2014-01-01.
Cross section image: skull/x-front—Plastination Laboratory at the Medical University of Vienna

Neurocranium of the skull

Occipital

Squamous part	external Inion/External occipital protuberance Occipital bun External occipital crest Nuchal lines Suprainiac fossa planes Occipital Nuchal internal Cruciform eminence Internal occipital protuberance Internal occipital crest Groove for transverse sinus
Lateral parts	Condyle Condyloid fossa Condylar canal Hypoglossal canal jugular Jugular process Jugular tubercle
Basilar part	Pharyngeal tubercle Clivus
Other	Foramen magnum Basion Opisthion

Parietal

Frontal

Squamous part	Frontal suture Frontal eminence external Superciliary arches Glabella foramina Supraorbital foramen Brow ridge Foramen cecum Zygomatic process internal Sagittal sulcus Frontal crest
Orbital part	Ethmoidal notch Fossa for lacrimal gland Trochlear fovea Frontal sinus Frontonasal duct

Temporal

Squamous part	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 (Aditus)
Petrous part	Carotid canal Facial canal Hiatus Internal auditory meatus Cochlear aqueduct 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 of 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 Supreme nasal concha Superior nasal concha Superior meatus Middle nasal concha Middle meatus
Labyrinth	Ethmoid sinus ethmoidal foramina Posterior Anterior