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a groove or furrow; used in anatomic nomenclature to designate a linear depression, especially one of the cerebral sulci.
basilar sulcus a groove in the midline of the anterior surface of the pons, lodging the basilar artery.
calcarine sulcus a sulcus of the medial surface of the occipital lobe, separating the cuneus from the lingual gyrus.
central sulcus fissure of Rolando.
cerebral sulci the furrows on the surface of the brain between the gyri (see gyrus).
collateral sulcus collateral fissure.
sul´ci cu´tis fine depressions of the skin between the ridges of the skin.
gingival sulcus the space between the surface of the tooth and the epithelium lining the free gingiva.
hippocampal sulcus hippocampal fissure.
posterior median sulcus posterior median fissure.
a double-S-shaped fissure extending obliquely upward and backward on the lateral surface of each cerebral hemisphere at the boundary between frontal and parietal lobes.
Etymology: Gk, kentron + L, furrow
cen·tral sul·cus(sen'trăl sŭl'kŭs) [TA]
A double S-shaped fissure extending obliquely upward and backward on the lateral surface of each cerebral hemisphere at the boundary between frontal and parietal lobes.
Rolando,Luigi, Italian anatomist, 1773-1831.
fissure of Rolando - a double S-shaped fissure extending obliquely upward and backward on the lateral surface of each cerebral hemisphere at the boundary between frontal and parietal lobes. Synonym(s): central sulcus
rolandic epilepsy - a benign autosomal dominant form of epilepsy occurring in children.
Rolando angle - the angle at which the fissure of Rolando meets with the midplane.
Rolando area - the region of the cerebral cortex most immediately influencing movements of the face, neck and trunk, arm, and leg. Synonym(s): motor cortex
Rolando cells - the nerve cells in Rolando gelatinous substance of the spinal cord.
Rolando column - a slight ridge on either side of the medulla oblongata related to the descending trigeminal tract and nucleus.
Rolando gelatinous substance - the apical part of the posterior horn of the spinal cord's gray matter, composed largely of very small nerve cells. Synonym(s): gelatinous substance
Rolando tubercle - a longitudinal prominence on the dorsolateral surface of the medulla oblongata along the lateral border of the tuberculum cuneatum. Synonym(s): tuberculum cinereum
pertaining to a center; located at the midpoint.
of the optic nerve, the source of the retinal artery. See also Table 9.
the fast-flowing channel through the capillary bed, the rate controlled by the metarterioles which exert a sphincter-like action on the system.
convulsions arising from stimulation of the central nervous system, as distinct from those caused by lesions elsewhere.
central cord syndrome
injury to the central portion of the cervical spinal cord resulting in disproportionately more weakness or paralysis in the forelimbs than in the hindlimbs; pathological change is caused by hemorrhage or edema.
central diabetes insipidus
see diabetes insipidus.
central European tick-borne encephalitis
central of the three layers of gray matter in the cerebellum; the principal cell type is piriform.
central nervous system
see central nervous system.
central peripheral neuropathy
see Boxer progressive axonopathy.
central progressive retinal atrophy
see central progressive retinal atrophy.
central projection law
the laws of physics applied to the primary x-ray beam of photons, e.g. the closer the object being x-rayed is to the film the sharper will be its definition.
central respiratory oscillator
pool of nerve cells in the pons and medulla oblongata which are responsible for the rhythmic to-and-fro movements of respiration.
central retinal degeneration
fissure of Rolando.
central tarsal bone
the bone of the hock which lies between the proximal and distal rows of tarsal bones.
central tendon of diaphragm
see diaphragmatic tendon.
the centrally placed drainage vessel of each hepatic lobule, receiving blood from the hepatic sinusoids.
central venous catheterization
insertion of an indwelling catheter into a central vein for the purpose of administering fluid and medications and for the measurement of central venous pressure (see below).
central venous pressure (CVP)
the pressure of blood in the right atrium, measured by an in situ catheter in the right atrium, is a much better guide of the degree of vasogenic peripheral failure than is arterial blood pressure. The technique is used mainly in dogs and cats.
pl. sulci [L.] a groove or furrow; a linear depression, especially one separating the gyri of the brain.
the third or abomasal part of the gastric groove.
lies between the dorsolateral cartilage at the nostril and the lateral accessory cartilage.
see calcarine sulcus.
fissure of Rolando.
see collateral fissure.
a groove at the top of the hoof wall that houses the coronal matrix.
an external groove which indicates the division of the ventricles of the heart and the atria. Houses the circumflex coronary blood vessels of the heart.
a deep groove which runs transversely across the rostro-dorsal surface of the cerebrum and which is one of the landmarks on the cerebral cortex.
fine depressions of the skin between the ridges of the skin.
dorsal median sulcus
see dorsal median fissure.
the groove between the surface of the tooth and the epithelium lining the free gingiva.
see jugular furrow.
lateral cerebral sulcus
see sylvian fissure.
a longitudinal groove in the neural tube wall of the embryo; stretches from the mesencephalon caudad.
the second part of the gastric groove in ruminants.
the first part of the gastric groove in ruminants.
a deep groove which separates the neopallium from the paleopallium on the lateral surface of the brain.
a groove on the external surface of the forestomachs that marks the division between the rumen and reticulum.
the groove between the sclera and cornea.
a landmark groove on the lateral side of the cerebral cortex.
the furrow in the ventral aspect of the corpus cavernosum of the penis that accommodates the corpus cavernosum urethrae and the urethra.