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The calcarine sulcus (or calcarine fissure) is an anatomical landmark located at the caudal end of the medial surface of the brain of humans and other primates. Its name comes from the Latin "calcar" meaning "spur". It is very deep, and known as a complete sulcus.
Projects to the upper bank of the calcarine fissure, called the cuneus; Contains input from the superior retinal quadrants, which represents the inferior visual field quadrants; Transection causes contralateral lower quadrantanopia; Lesions that involve both cunei cause a lower altitudinal hemianopia (altitudinopia) The lower division:
The calcar avis, (calcarine spur) previously known as the hippocampus minor, [1] is an involution of the wall of the lateral ventricle's posterior cornu produced by the calcarine fissure. [ 2 ] It is sometimes visible on ultrasonogram [ 3 ] and can resemble a clot .
In neuroanatomy, a sulcus (Latin: "furrow"; pl.: sulci) is a shallow depression or groove in the cerebral cortex.One or more sulci surround a gyrus (pl. gyri), a ridge on the surface of the cortex, creating the characteristic folded appearance of the brain in humans and most other mammals.
Broca's fissure: found in the third left frontal fold of the brain. Burdach's fissure: connects the brain's insula and the inner surface of the operculum. Calcarine sulcus or Calcerine fissure: extends from the occipital of the cerebrum to the occipital fissure. Callosomarginal fissure: found in the medial surface of the cerebrum.
Human V1 is located on the medial side of the occipital lobe within the calcarine sulcus; the full extent of V1 often continues onto the occipital pole. V1 is often also called striate cortex because it can be identified by a large stripe of myelin, the stria of Gennari. Visually driven regions outside V1 are called extrastriate cortex.
The primary visual cortex (V1) is located in and around the calcarine fissure in the occipital lobe.Each hemisphere's V1 receives information directly from its ipsilateral lateral geniculate nucleus that receives signals from the contralateral visual hemifield.
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