Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
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 long, deep sagittal fissure on the undersurface of the temporal lobe, marking the border between the fusiform gyrus laterally and the hippocampal and lingual gyri medially; the great depth of the collateral sulcus results in a bulging of the floor of the occipital and temporal horn of the lateral ventricle, the collateral eminence.
col·lat·er·al sul·cus(kŏ-lat'ĕr-ăl sŭl'kŭs) [TA]
A long, deep sagittal fissure on the undersurface of the temporal lobe, marking the border between the fusiform gyrus laterally and the hippocampal and lingual gyri medially; the great depth of the collateral sulcus results in a bulging of the floor of the occipital and temporal horn of the lateral ventricle, the collateral eminence.
1. secondary or accessory; not direct or immediate.
2. a side branch, as of a blood vessel or nerve.
3. security for a loan.
see collateral vessel.
a longitudinal fissure of the cerebral hemisphere between the fusiform and parahippocampal gyri. Called also collateral sulcus.
the utilization of many small arterial-capillary units in pulmonary tissue during exercise and increased cardiac output, for increased exchange of gases.
where two individuals have a common ancestor.
see collateral fissure.
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.