sulcus /sul·cus/ (sul´kus) pl. sul´ci [L.] a groove, trench, or furrow; in anatomy, a general term for such a depression, especially one on the brain surface, separating the gyri.
intraparietal sulcus
arterial sulci grooves on the internal surfaces of the cranial bones for the meningeal arteries.
calcarine sulcus a sulcus of the medial surface of the occipital lobe, separating the cuneus from the lingual gyrus.
central cerebral sulcus one between the frontal and parietal lobes of the cerebral hemisphere.
cerebral sulci the furrows between the cerebral gyri.
cerebral sulcus, lateral fissure of Sylvius.
cingulate sulcus one on the median surface of the hemisphere midway between the corpus callosum and the margin of the surface.
collateral sulcus one on the inferior surface of the cerebral hemisphere between the fusiform and parahippocampal gyri.
sul´ci cu´tis the fine depressions on the surface of the skin between the dermal ridges.
gingival sulcus the groove between the surface of the tooth and the epithelium lining the free gingiva.
hippocampal sulcus one extending from the splenium of the corpus callosum almost to the tip of the temporal lobe.
interlobar sulci the sulci that separate the lobes of the brain from each other.
intraparietal sulcus one separating the parietal gyri.
sulcus of matrix of nail the skin fold in which the proximal part of the nail is embedded.
parietooccipital sulcus one marking the boundary between the cuneus and precuneus, and also between the parietal and occipital lobes of the cerebral hemisphere.
posterior median sulcus
1. a shallow vertical groove in the closed part of the medulla oblongata, continuous with the posterior median sulcus of the spinal cord.
2. a shallow vertical groove dividing the spinal cord throughout its whole length in the midline posteriorly.
precentral sulcus one separating the precentral gyrus from the remainder of the frontal lobe.
scleral sulcus a slight groove at the junction of the sclera and cornea.
venous sulci grooves on the internal surfaces of the cranial bones for the meningeal veins.
in·tra·pa·ri·e·tal sulcus ( n tr -p-r  -tl)n. A horizontal sulcus extending from the postcentral sulcus and dividing into two branches to form with the postcentral sulcus a figure H that divides the parietal lobe into a superior and an inferior lobule. |
intraparietal sulcus
[-perī′ətəl]
Etymology: L, intra + paries, wall, sulcus, groove
an irregular groove on the convex surface of the parietal lobe that marks the division of the inferior and superior parietal lobules of the cerebrum. Also called interparietal fissure.
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