sagittal crest

(redirected from sagittal crests)

sag·it·tal crest

a prominent ridge along the sagittal suture of the skull, present in some animals as a result of temporal muscle development.


1. a projecting structure or ridge, especially one surmounting a bone or its border.
2. a term describing the upper margin of the neck; root of the mane in a horse.
3. in canaries, a crown of long feathers on the head, all radiating out from a central point; inherited as a dominant trait.

ampullary crest
linear thickenings of the walls of the ampullae of the semicircular canals.
dental crest
the maxillary ridge passing along the alveolar processes of the fetal maxillary bones.
epicondylar crest
ridges which extend from the epicondyles of the humerus to the shaft.
ethmoid crest
located on the inside surface of the nasal bones of the pig and dog.
external occipital crest
an extension of the external occipital protuberance to which the ligamentum nuchae is attached.
facial crest
the prominent crest on the external aspect of the maxilla of horses stretching from beneath the orbit to the middle of the molar teeth. The masseter muscle is attached to its ventral surface.
crest hair
see mane.
iliac crest
the thickened cranial border of the ilium of dogs and cats.
neck crest
the fatty, fibrous tissue above the nuchal ligament which gives the stallion's neck its characteristic elevated contour.
neural crest
cords of nervous tissue which detaches from the developing spinal cord in the embryo; contribute tissue to the somatic and autonomic ganglia, and many other structures.
nuchal crest
the thick, transverse crest on the occipital bone.
palatine crest
a low transverse ridge on the palatine bones.
petrosal crest
divides the cranial cavity into cerebellar and cerebral compartments.
renal crest
the median ridge in the pelvis of many kidneys onto which papillary ducts open.
reticular c's
the mucosal folds in the ruminant reticulum that form the cells of the honeycomb compartments of the walls.
sacral c's
the median crest is the fused dorsal spines of the sacral vertebrae; the lateral sacral crest is the fused articular processes.
sagittal crest
the ridge in the middle of the skull which extends forwards from the occipital protuberance; more pronounced in some species, breeds and individuals.
trochanteric crest
a ridge which runs between the greater and lesser trochanters and forms the caudal wall of the trochanteric fossa.
urethral crest
a longitudinal ridge in the roof of the pelvic urethra formed from two folds of urinary bladder mucosa which fuse after separate origins at the ureteric orifices.
vestibular crest
divides the vestibule of the inner ear into the spherical and elliptical recesses.
References in periodicals archive ?
The ventral face is convex lacking ventrolateral or sagittal crests.
Not taking into account this sagittal crest, the ventral face is convex at midpoint.
The ventral face is generally flat-to-convex and presents a smooth sagittal crest up to CdM, as occurs in the anterior caudal vertebrae.
One particular feature is the presence of a smooth sagittal crest on the ventral face that is just shared by MG 4804 from Salir de Matos (Caldas da Rainha).
9 mm); lambdoidal and sagittal crests greatly developed; supraorbital rims elevated, converging posteriorly; coronoid process and mandibular condyle aligned in parallel with the dentary; apical margins of the upper incisors divergent, I2 located diagonally behind I1; upper canines long with a very conspicuous external cingulum; large P4, triangular in occlusal view; p1 smaller than half the size of p2; molar ectolophs W-shaped; M3 broader than long, half the size of M2.
9 mm) and narrow; lambdoidal and sagittal crests poorly developed; braincase rounded and narrow (BBC: 8.
9 mm); sagittal crest poorly developed; postorbital region poorly constricted (INC: 6 mm); zygomatic arch narrow (ZYG: 15 mm); incisors 2/2, internal upper incisors larger than the external, different in shape; premolars 2/2, P3 separated from P4 by a short diastema; molars 3/3, ectolophs W-shaped.
3 mm); well developed sagittal crest, extending from the posterior end of the nasals to the lambdoidal crest, being highest in the region of the postorbital constriction; upper incisors completely fill the space between the canines; canines with external cingulum very developed; P4 broad, in occlusal view almost as broad as M1; molars broad, ectolophs of M1 and M2 W-shaped; M3 smaller than the M1 and M2, with the talon very reduced, having a V-shape.
Vertical migration of the temporalis proceeds, in most adults, to the point where the two masses meet posteriorly and continue anteriorly, initiating the formation of sagittal crests as sites for muscle attachment.
Both sexes may be marked by sagittal crests, but in at least one extremely old adult (sex unknown), margins of muscle scars were less advanced than in most subadults.
3), and the sagittal crests of older animals often are deviated to one side--see figures in Hall (1981), Jackson (1961), and Stangl et al.
3), and any asymmetry or directional deviation of these scars or of the sagittal crest, were recorded.