| superior border of petrous part of temporal bone |
The margin that separates the anterior and posterior surfaces of the petrous part of the temporal bone and the lateral part of the middle cranial fossa from the posterior cranial fossa.
Synonym: margo superior partis petrosae ossis temporalis, crest of petrous part of temporal bone.
(05 Mar 2000) |
| occipital border of parietal bone |
The posterior margin of the parietal bone that articulates with the occipital squama.
Synonym: margo occipitalis ossis parietalis.
(05 Mar 2000) |
| occipital border of temporal bone |
That part of the temporal bone that articulates with the occipital squama.
Synonym: margo occipitalis ossis temporalis.
(05 Mar 2000) |
| lambdoid border of occipital bone |
<anatomy> The margin of the occipital squama that articulates with the parietal bones in the lambdoid suture.
Synonym: margo lambdoideus squamae occipitalis, lambdoid margin of occipital bone.
(05 Mar 2000) |
| frontal border of parietal bone |
The margin of the parietal bone that articulates with the frontal bone.
Synonym: margo frontalis ossis parietalis.
(05 Mar 2000) |
| sphenoid |
1. Wedge-shaped; as, a sphenoid crystal.
2. <anatomy> Of or pertaining to the sphenoid bone.
<anatomy> Sphenoid bone, an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several foetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosphenoid, Presphenoid.
Origin: Gr.; a wedge + form: cf. F. Sphenoide.
1. <chemistry> A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.
2. <anatomy> The sphenoid bone.
Source: Websters Dictionary
(01 Mar 1998) |
| sphenoid crest |
A vertical ridge in the midline of the anterior surface of the sphenoid bone that articulates with the perpendicular plate of the ethmoid bone.
Synonym: crista sphenoidalis.
(05 Mar 2000) |
| sphenoid process |
The posterior and smaller of the two processes at the extremity of the vertical plate of the palatine bone; processus sphenoidalis cartilaginis septi nasi, processus posterior cartilaginis septi nasi.
Synonym: processus sphenoidalis, sphenoid process.
(05 Mar 2000) |
| sphenoid process of septal cartilage |
The tapering extension of the septal cartilage that lies between the perpendicular plate of the ethmoid and the vomer.
Synonym: processus posterior cartilaginis septi nasi, processus sphenoidalis cartilaginis septi nasi, sphenoid process of septal cartilage.
(05 Mar 2000) |
| sphenoid sinus |
One of the paired paranasal sinuses, located in the body of the sphenoid bone and communicating with the highest meatus of the nasal cavity on the same side.
(12 Dec 1998) |
| sphenoid sinusitis |
Inflammation of the sphenoid sinus. This condition usually is accompanied by pansinusitis and may present itself in an acute or chronic form.
(12 Dec 1998) |
| bone within a bone |
<radiology> STOP heavy metal, S: sickle cell disease, T: Thorotrast, O: osteopetrosis, P: Paget's disease, heavy metals, hypervitaminosis D
(12 Dec 1998) |
| bilateral medial orbital ecchymoses |
<clinical sign, ophthalmology> The appearance of the eyes produced by subconjunctival haemorrhage and/or periorbital ecchymosis.
Synonym: bilateral medial orbital ecchymoses.
(21 Jun 2000) |
| cephalo-orbital index |
The ratio of the cubic content of the two orbits to that of the cranial cavity multiplied by 100.
(05 Mar 2000) |
| granuloma, plasma cell, orbital |
A distinctive, chronic inflammatory reaction in the orbital tissues of the eye, of unknown aetiology, that may closely resemble a neoplasm and often becomes bilateral. Symptoms include exophthalmos and congestion of the lids with oedema. When limitation of ocular motility also occurs, it is sometimes called orbital myositis.
(12 Dec 1998) |
