What's the difference between anterior and presphenoid?

Definition:

(a.) Before in time; antecedent.
(a.) Before, or toward the front, in place; as, the anterior part of the mouth; -- opposed to posterior.

Example Sentences:

(1) The adjacent gauge was separated from the ischemic segment by one large nonoccluded diagonal branch of the left anterior descending artery.
(2) In 1 of the 3, anterior capsular detachment was also demonstrated radiographically and confirmed surgically.
(3) Content of cyclic nucleoside monophosphates was decreased in all the eye tissues in experimental toxico-allergic uveitis as well as penetration of cAMP into the fluid of anterior chamber of the eye.
(4) The article describes an unusual case with development of a right anterior mediastinal mass after bypass surgery with internal mammary artery grafts.
(5) A topographic relationship was recognized between the MM and the anterior thalamic nuclei.
(6) When the eye was dissected into anterior uveal, scleral, and retinal complexes, prostaglandin D2 was formed in the highest degree in all the complexes, whereas prostaglandin E2 and F2 alpha formation was specific to given ocular regions.
(7) Small pieces of anterior and posterior quail wing-bud mesoderm (HH stages 21-23) were placed in in vitro culture for up to 3 days.
(8) A neonate without external malformation had undergone removal of a nasopharyngeal mass containing anterior and posterior pituitary tissue.
(9) In the course of the syndrome development blood vessel permeability was increased in the anterior chamber of the eye.
(10) For the case described by the author primary tearing of the chiasma due to sudden applanation of the skull in the frontal region with burstfractures in the anterior cranial fossa is assumed.
(11) An opening wedge osteotomy is then directed posterior-dorsal to anterior-plantar, to effectively plantarflex the posterior aspect of the calcaneus.
(12) Anterior borderzone brachial paralysis (ABBP) is a hemodynamic ischemic syndrome of the watershed zone between the anterior and middle cerebral arteries.
(13) Studies were conducted to evaluate the effects of acute (24 h) thermal stress on anterior pituitary function in hens.
(14) Histologic examination of the anterior and posterior chambers and the vitreous led to a diagnosis of endophthalmitis caused by Coccidioides immitis infection.
(15) The temperature increased from the anterior to the posterior region on both buccal and lingual sides of both arches.
(16) For this purpose the blood flow velocity in the internal carotid artery, basilar cerebral artery and the anterior cerebral artery was measured by pulsed Dopplersonography before and 5-10 min after i.v.
(17) The 2A8 clone, a normal diploid rat anterior pituitary cell strain, was investigated by immunocytochemistry to determine the cell types into which the clonal cells differentiated in vivo and in vitro.
(18) Accordingly, the present studies were conducted to determine whether acute OVX-induced FSH hypersecretion can be elicited in an animal model in which the anterior pituitary gland is isolated from diencephalic chemical signals, and if so, whether the hypersecretion could be abated by the FSH-suppressing protein, follistatin.
(19) Eight cases of calcification following anterior dislocation of the head of the radius are described.
(20) A case of dissecting hematoma involving the left main, left anterior descending, and left circumflex coronary arteries is described in a patient who had received vigorous closed-chest cardiac resuscitation.

Presphenoid

Definition:

(a.) Situated in front of the sphenoid bone; of or pertaining to the anterior part of the sphenoid bone (i. e., the presphenoid bone).
(n.) The presphenoid bone.

Example Sentences:

(1) The canal represents the impression left by the remnants of the sphenoidal synchondrosis between the presphenoid and postsphenoid.
(2) Dams from the groups receiving restricted food on gestation days 6 to 15 had increased resorptions, and the progeny had delayed ossification of the skeleton with cleft palate accompanied by delayed ossification of the presphenoid bone.
(3) Chondrogenesis of the nasal septal cartilage started at the 13th embryonic day, premaxillary and vomerin bone formation at the 14th embryonic day and endochondral bone formation of the septo-presphenoid area at the 17th embryonic day.
(4) The odontocete larynx, however, lies rostral to the level of the atlas and extends to the presphenoidal synchondrosis.
(5) The presphenoid exhibits signal intensity characteristics of fatty marrow before it is invaginated by the developing sphenoid sinus.
(6) Between 7 months and 2 years, most patients (24 of 27) exhibited fatty conversion of bone marrow limited to the presphenoid (grade 2).
(7) Three independent observers assessed (1) the intensity of contrast enhancement of the basisphenoid, basiocciput and presphenoid, (2) the signal intensity of the spheno-occipital synchondrosis, (3) the degree of pneumatization of the sphenoid sinus and (4) the uniformity of signal intensity reflecting fatty replacement of the marrow of the basisphenoid, basiocciput and presphenoid.
(8) The angle between the occipital and sphenoid bones was decreased and between the presphenoid and sphenoid bones increased by 50 and 100 days.
(9) After differentiation of the nasal septal cartilage, this cartilage supported ethmoid bone formation by endochondal ossification in the septo-presphenoid area.
(10) The signal intensity of the presphenoid bone marrow (anteromedial part of the sphenoid bone) was as low as that of muscle (grade 1) and remained the same as that of the basisphenoid and basiocicput in all infants (n = 6) younger than 6 months.
(11) The sequence in which the next bones ossify is occipital bone, basisphenoid bone, presphenoid bone, and ethmoid bone.
(12) Such abnormalities as are present in the bony floor and the related lacrimal sac are considered to be secondary to the absence of the presphenoid and the postero-inferior part of the nasal cavity.
(13) The suggestion is made that the abnormalities of the palatine bone in human cyclopia are secondary to the absence of the presphenoid and the nasal cavity.
(14) Pneumatization develops originally within the presphenoid, beginning anteriorly and proceeding posteriorly.