The sphenoidal conchae (sphenoidal turbinated processes) are two thin, curved plates, situated at the anterior
and lower part of the body of the sphenoid. An aperture of variable size exists in
the anterior wall of each, and through this the sphenoidal sinus opens into the nasal
cavity.
Each is irregular in form, and tapers to a point behind, being broader and thinner in front.
Its upper surface is concave, and looks toward the cavity of the sinus; its under surface is convex, and forms part of the
roof of the corresponding nasal cavity.
Each bone articulates in front with the ethmoid, laterally with the palatine; its pointed posterior extremity is placed above the vomer, and is
received between the root of the pterygoid process laterally and the rostrum of the sphenoid
medially.
A small portion of the sphenoidal concha sometimes enters into the formation of the medial wall of the orbit, between the
lamina papyracea of the ethmoid in front, the
orbital plate of the palatine below, and the frontal bone above.
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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 As such, some of the information contained herein may be outdated.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.
|
Bones of head and neck: the cranium |
| Occipital |
Foramen magnum -
Squama occipitalis (Inion - Nuchal lines - Planum occipitale - Planum nuchale - Cruciform eminence - Internal occipital protuberance - Sagittal
sulcus - Internal occipital crest)
Lateral parts (Occipital
condyle - Hypoglossal canal - Condyloid
fossa - Condylar canal - Jugular process
- Jugular tubercle) - Basilar
part (Pharyngeal tubercle) |
| Parietal |
Parietal
eminence - Temporal line - Parietal
foramen |
| Frontal |
Squama frontalis
(Frontal suture - Frontal eminence -
Superciliary arches - Glabella - Supraorbital foramen - Zygomatic process
- Sagittal sulcus - Frontal crest -
Foramen cecum) - Pars orbitalis
(Ethmoidal notch - Lacrimal fossa -
Trochlear fovea - Posterior ethmoidal
foramen - Anterior ethmoidal foramen - Frontal sinus - Frontonasal duct) |
| Temporal |
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 (Facial canal - 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 - Petrosquamous suture) -
Tympanic part (Suprameatal
spine) - Zygomatic process |
| Sphenoid |
Body Superior
surface (Ethmoidal spine, Chiasmatic
groove, Optic foramen, Sella turcica,
Fossa hypophyseos, Middle clinoid
process, Dorsum sellae, Posterior
clinoid processes, Petrosal process, Clivus) - Lateral surface (Carotid groove -
Sphenoidal lingula) - Anterior surface (Sphenoidal sinuses) - Great wings
(Spine, 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
canal, Pterygoid hamulus) - Sphenoidal
conchae |
| Ethmoid |
Cribriform plate (Crista galli) - Perpendicular plate - Labyrinth
(Ethmoid sinus) - Lateral surface Lamina
papyracea - Uncinate process - Medial surface
Middle nasal concha - Superior meatus -
Superior nasal concha - Middle meatus |
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