posterior median sulcus

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.

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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.

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posterior median sulcus

n.

The longitudinal groove marking the posterior midline of the medulla oblongata and continuous below with the posterior median sulcus of the spinal cord. Also called posterior median fissure.