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	Dorsum (biology) - Wikipedia, the free encyclopedia
		In lepidoptera, the dorsum also refers to the trailing edge of the wing (the leading edge is called the costa).
		Dorsum and dorsally are derivatives of this word and refer to anatomical structures that are either toward the back (backbone) or off the back side of an animal.
		Examples of this include the dorsal fin, dorsal root ganglion, dorsal root, dorsal nerve, dorsum sellae, dorsal arch, dorsalis pedis arteries, dorsal ramus, dorsal scales, dorsal respiratory group, dorsal venous arch, and dorsiflexion among others.
	en.wikipedia.org /wiki/Dorsum_(biology) (203 words)

	Sella turcica - Wikipedia, the free encyclopedia
		The Sella turcica (literally Turkish saddle) is a saddle-shaped depression in the sphenoid bone at the base of the human skull.
		The seat of the saddle is known as the hypophyseal fossa which holds the pituitary gland.
		The dorsum sellae is terminated laterally by the posterior clinoid processes.
	en.wikipedia.org /wiki/Sella_turcica (134 words)

	Microanatomy of the Sellar Region
		The relation of the chiasm to the sella is an important determinant of the ease with which the pituitary fossa may be exposed by the transfrontal surgical route.
		The normal chiasm overlies the diaphragma sellae and the pituitary, the prefixed chiasm overlies the tuberculum sellae, and the postfixed chiasm overlies the dorsum sellae.
		Computed tomography of the sella is routinely used to define the relation of the septa to the floor of the sella for trans-sphenoidal surgery.
	www.pituitaryadenomas.com /microanatomysellar.htm (2209 words)

	II. Osteology. 5a. 5. The Sphenoid Bone. Gray, Henry. 1918. Anatomy of the Human Body.
		On either side of the dorsum sellæ is a notch for the passage of the abducent nerve, and below the notch a sharp process, the petrosal process, which articulates with the apex of the petrous portion of the temporal bone, and forms the medial boundary of the foramen lacerum.
		Behind the dorsum sellæ is a shallow depression, the clivus, which slopes obliquely backward, and is continuous with the groove on the basilar portion of the occipital bone; it supports the upper part of the pons.
		The orbital plate and that part of the sphenoid which is found in the temporal fossa, as well as the lateral pterygoid plate, are ossified in membrane (Fawcett) 34.
	www.bartleby.com /107/35.html (2775 words)

	Bridging and Dimensions of Sella Turcica in Subjects Treated by Surgical-orthodontic Means or Orthodontics Only (Site not responding. Last check: 2007-10-31)
		A sella turcica bridge was identified as a continuous band of bony tissue extending from the anterior cranial fossa to the posterior cranial fossa.
		The sella turcica is an important anatomical structure for cephalometric assessment because of its central landmark, sella, a saddle-shaped area of bone located in the middle cranial fossa.
		The sella turcica lies on the intracranial surface of the body of the sphenoid and consists of a central pituitary fossa bounded anteriorly by the tuberculum sellae and posteriorly by the dorsum sellae.
	www.arabmedmag.com /issue-15-05-2005/dentistry/main01.htm (2523 words)

	AANS.org \| Education and Meetings \| AANS Scientific Journals \| Neurosurgical Focus
		The bone of the dorsum sellae is drilled away from within the excavated cavernous sinus.
		The transcavernous removal of the posterior clinoid process and a portion of the dorsum sellae extended the exposure proximally along the BA and widened the operative field, allowing enough room to clip the aneurysm in all cases and to place a temporary clip on the proximal BA in Cases 1, 2, and 6.
		At transsphenoidal exploration, a hole was found in the dorsum sellae at the level of the floor of the sella turcica.
	www.aans.org /education/journal/neurosurgical/october98/5-4-p2.asp?ShowMenu=false&ShowPrint=false (3069 words)

	The brain and cranial cavity (Site not responding. Last check: 2007-10-31)
		Identify the pituitary gland (hypophysis cerebri) in the cranial cavity and the dural diapphragma sellae.
		The sphenoid ridges (of the lesser wings of the sphenoid) and the anterior border of the groove for the optic chiasm separate the anterior and posterior cranial fossa.
		The middle and posterior cranial fossa are separated by the petrous ridges and the dorsum sellae in the midline.
	www.umanitoba.ca /faculties/medicine/anatomy/disjv16.htm (1573 words)

	[No title]
		The lateral expanded part of the middle cranial fossa is bounded in front by the great wing of the sphenoid (alisphenoid), behind by the front of the petrous part of the temporal (periotic) and laterally by the squamous part of the temporal (squamosal).
		At the apex of the petrous bone and at the side of the dorsum sellae is the middle lacerated foramen (c), already noticed, and running inward to this from an aperture in the petrous bone is a groove for the great superficial petrosal nerve which is overlaid by the Casserian ganglion of the filth nerve.
		The posterior cranial fossa is pentagonal in outline, having an anterior border formed by the dorsum sellae, two antero-lateral borders, by the upper borders of the petrous bones, and two posterolateral curved borders, by the grooves for the lateral sinuses (fig.
	encyclopedia.jrank.org /correction/edit?content_id=65284&locale=en (905 words)

	Endotext.com - Neuroendocrinology, Hypothalamus, And Pituitary - Radiotherapy for Pituitary and Hypothalamic Tumours
		The sella turcica is a shallow depression in the sphenoid bone bounded anteriorly and inferiorly by the sphenoid sinus, laterally by the cavernous sinuses, posteriorly by the dorsum sellae and superiorly by the diaphragma sellae and suprasellar cistern [Figure 1].
		The diaphragma sellae is a thin dural membrane overlying the sella that is fenestrated to allow passage of the infundibulum.
		MR accurately demonstrates meningiomas arising within the cavernous sinus, from the clinoid process, or from the diaphragma sellae in the sella and suprasellar region.
	www.endotext.org /neuroendo/neuroendo4/neuroendo4.htm (2213 words)

	II. Osteology. 5d. The Interior of the Skull. Gray, Henry. 1918. Anatomy of the Human Body.
		Behind the tuberculum sellæ is a deep depression, the sella turcica, containing the fossa hypophyseos, which lodges the hypophysis, and presents on its anterior wall the middle clinoid processes.
		It is formed by the dorsum sellæ and clivus of the sphenoid, the occipital, the petrous and mastoid portions of the temporals, and the mastoid angles of the parietal bones; it is crossed by the occipitomastoid and the parietomastoid sutures, and lodges the cerebellum, pons, and medulla oblongata.
		It is separated from the middle fossa in and near the median line by the dorsum sellæ of the sphenoid and on either side by the superior angle of the petrous portion of the temporal bone.
	www.bartleby.com /107/47.html (4384 words)

	Sphenoid bone - Biocrawler (Site not responding. Last check: 2007-10-31)
		Behind the chiasmatic groove is an elevation, the tuberculum sellæ; and still more posteriorly, a deep depression, the sella turcica, the deepest part of which lodges the hypophysis cerebri and is known as the hypophyseal fossa.
		Behind the dorsum sellae is a shallow depression, the clivus, which slopes obliquely backward, and is continuous with the groove on the basilar portion of the occipital bone; it supports the upper part of the pons.
		Until the seventh or eighth month of fetal life the body of the sphenoid consists of two parts: one in front of the tuberculum sellæ, the presphenoid, with which the small wings are continuous; the other, comprising the sella turcica and dorsum sellæ, the postsphenoid, with which are associated the great wings, and pterygoid processes.
	www.biocrawler.com /encyclopedia/Sphenoid (2810 words)

	Anatomy I
		The diaphragma sella is a small circular fold of dura mater that forms the roof for sella turcica, a small opening in its center allows passage of the stalk of the pituitary gland.
		On the interior of the base of the skull, observe the middle cranial fossa, sella turcica, anterior and posterior clinoid processes, tuberculum sellae and dorsum sellae.
		Be aware of the fact that the floor of sella turcica forms the roof of the sphenoid sinus.
	www.med.uottawa.ca /medweb/demo_site/undergrad/webct/lectures/curriculum_endo/e_endo2_lab01.htm (1087 words)

	Anatomical variants in the floor of the third ventricle; implications for endoscopic third ventriculostomy -- Morota et ... (Site not responding. Last check: 2007-10-31)
		Note that the rest of the anterior part of the floor of the third ventricle (between the dorsum sellae and mamillary body) was hanging down over the basilar artery and pons (small arrow heads).
		The pituitary gland coloured orange was directly in the bottom of the pituitary fossa between the optic chiasm and dorsum sellae.
		The presence and development of hydrocephalus, empty sella, and persistence of an infundibular recess seem to be interrelated.
	jnnp.bmjjournals.com /cgi/content/full/69/4/531 (1516 words)

	Cranial Fossae
		Lateral portion of dorsum sella surmounted by posterior clinoids.
		• The bony floor is formed by the dorsum sellae and the clivus of the sphenoid, the occipital bone, the petrous and mastoid temporal bone, and the parietal bone.
		Separated from middle fossa in the midline by the dorsum sellae and on either side by the grooved superior margin of the petrous bone.
	www.ucsf.edu /nreview/02.4-Anatomy-Cranium/CranialFossae.html (529 words)

	Middle and posterior cranial fossa : Contents, boundaries and clinical importance.
		In the centre, floor is formed by the sella tursica of body of sphenoid.
		Te sella tursica is named for its resemblance of the Turkish saddle with its anterior tuberculum sella, central fossa and posterior dorsum sella.
		Anteriorly the fossa is bounded by the superior border of the petrous part of temporal bone and dorsum sallae.
	www.welovelmc.com /books/anatomy/cranialcavity1.htm (532 words)

	Article Figures and Tables
		The PCP and dorsum sellae are drilled to expose the basilar dura (F).
		The optic chiasm usually is found over the diaphragma sellae in most cases (A and B), but in some cases it may be prefixed (one of 10 specimens in this study) or postfixed (none of the specimens in this study).
		Note that drilling the posterior clinoid process and the dorsum sellae did not add much to the angle of exposure.
	www.thejns-net.org /jns/issues/v97n1/fig_tab/n0970151_f5.html (1504 words)

	THE INTERIOR OF THE CR... - Online Information article about THE INTERIOR OF THE CR...
		wall-like dorsum sellae, at the sides of which are the posterior clinoid processes (5, 4).
		sella, for sedla; it is not derived directly from Lat.
		apex of the petrous bone and at the side of the dorsum sellae is the middle lacerated foramen (c), already noticed, and See also:
	encyclopedia.jrank.org /TAV_THE/THE_INTERIOR_OF_THE_CRANIUM.html (1254 words)

	MEDSTUDENTS-NEUROANATOMY (Site not responding. Last check: 2007-10-31)
		The body of the sphenoid bone contains in this fossa the prechiasmatic sulcus (which contains the optic chiasma) and the sella turcica (it resembles a premedieval turkish saddle), composed by the tuberculum sellae, hypophyseal fossa, posterior clinoid process and the dorsum sellae.
		The middle cranial fossa is limited posteriorly by the superior angle of the petrous portion of the temporal bone and the dorsum sellae centrally.
		From defore backward in the sphenoid bone is the superior orbital fissure, foramen rotundum, foramen ovale and foramen spinosum.
	www.medstudents.com.br /basic/neuran/neuran1.htm (557 words)

	AANS.org \| Education and Meetings \| AANS Scientific Journals \| Neurosurgical Focus
		Using midline sagittal MR imaging, we measured the length from the synchondrosis to the top of the dorsum sellae as constituting the basisphenoidal part of the clivus, and the length from the synchondrosis to the basion as the basioccipital portion.
		The sphenooccipital synchondrosis was clearly visible in 14 of 20 patients with adult-type Chiari malformation and in 25 of 44 normal control subjects who underwent MR imaging, although it was not demonstrated by x-ray tomography (Table 1).
		Of the individuals with a clearly visualized sphenooccipital synchondrosis, the top of the dorsum sellae, which was defined as the top of the clivus, was clearly demonstrated in the MR images of 10 patients in the Chiari group and 10 in the control group.
	www.aans.org /education/journal/neurosurgical/nov96/1-5-p1.asp (3812 words)

	The diaphragma sellae: its relationship to the configuration of the pituitary gland -- Sage et al. 145 (3): 703 -- ...
		The diaphragma sellae: its relationship to the configuration of the pituitary gland -- Sage et al.
		The diaphragma sellae: its relationship to the configuration of the pituitary gland
		In 46 specimens the diaphragma sellae was complete.
	intl-radiology.rsnajnls.org /cgi/content/abstract/145/3/703 (248 words)

	Abducens Nerve (Site not responding. Last check: 2007-10-31)
		These cells give rise to axons that course ventrally and exit the brain at the junction of the pons and the pyramid of the medulla.
		The nerve of each side then travels anteriorly where it pierces the dura lateral to the dorsum sellae.
		The nerve continues forward and bends over the ridge of the petrous part of the temporal bone and enters the cavernous sinus.
	www.meddean.luc.edu /lumen/MedEd/GrossAnatomy/h_n/cn/cn1/cn6.htm (146 words)

	Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus V: Skeletal System: SphenoidBone
		The superior part of the dorsum sellae may be a separate bone or it may be joined to the petrous portion of the temporal bone.
		the floor of the sellae may be concave (58% of patients), flat (32-35%), or convex (9.5%).
		A bridge of bone joining the anterior and posterior clinoid processes is reported to occur in 5% of individuals studied.
	www.anatomyatlases.org /AnatomicVariants/SkeletalSystem/Text/SphenoidBone.shtml (3295 words)

	Figure 43-10 (Site not responding. Last check: 2007-10-31)
		In C, the lesser wings of the sphenoid bone and the petrous portions of the temporal bones delimit the cranial fossae.
		The dorsum sellae appears as a white band between the shadows of the temporal lobes.
		Between the cerebellar hemispheres, the fourth ventricle is visible as a dark, inverted U. (Courtesy of Giovanni Di Chiro, M.D., Bethesda, Maryland.) In D, the approximate planes of section are indicated.
	www.dartmouth.edu /~humananatomy/figures/chapter_43/43-10.HTM (130 words)

	[No title]
		Dorsum definition - Medical Dictionary definitions of popular...
		The upper (dorsal) surface of the head or body.
		This image shows how the wind is eroding the material of Gordii Dorsum.
	www.howstuffworks.com /search2.php?pg=&server=www.howstuffworks.com&terms=dorsum (109 words)

	Post-natal size and morphology of the sella turcica. Longitudinal cephalometric standards for Norwegians between 6 and ...
		The length, depth, and diameter of the sella turcica was measured
		The length of the sella turcica was almost constant throughout
		The morphology of the sella turcica was assessed and five different
	ejo.oxfordjournals.org /cgi/content/abstract/26/6/597 (387 words)

	[No title] (Site not responding. Last check: 2007-10-31)
		The patient also had a unilateral optic neuropathy and the examination disclosed complete bitemporal hemianopsia.
		Midline basilar skull fractures that traversed the midclivus through the sella turcica floor, dorsum sellae, and sphenoid were present.
		MRI did not identify intracranial hemorrhage as the cause of the visual field defect.
	www.eyenet.gr /periodiko/sept97/annals18eng.html (100 words)

	Evaluation of Platybasia with MR Imaging -- Koenigsberg et al. 26 (1): 89 -- American Journal of Neuroradiology
		and dorsum sellae connecting a line along the clivus.
		This method uses different landmarks—the angle formed by a line extending across the anterior cranial fossa to the tip to the dorsum sellae with a second, connecting line drawn along the posterior margin of the clivus.
		fossa, the dorsum sellae, and the clivus are clearly identifiable
	www.ajnr.org /cgi/content/full/26/1/89 (1638 words)

	case21ans (Site not responding. Last check: 2007-10-31)
		The lateral film of his sella turcica shows enlargement of the sella
		MRI scans of his brain show a mass with both solid and cystic components.
		The solid component, in the sella turcica, has calcification (red arrow), which appears
	www.medicine.cmu.ac.th /dept/radiology/pedrad/case35ans.htm (66 words)

	Interior of the Skull, Cranial Meninges and Related Vasculature
		Use a skull to locate where the specializations of the dura are attached.
		In one or two sentences describe each of the following: a) Tentorium cerebelli; b) Falx cerebri; c) Diaphragma sellae.
		"Turkish saddle"; roughly equivalent to the hypophyseal fossa; area between the tuberculum sellae and the posterior clinoid processes
	anatomy.uams.edu /anatomyhtml/cranialcavity.html (2863 words)

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