calcarine fissure

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calcarine fissure

[′kal·kə‚rēn ′fish·ər]
(anatomy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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VBM analysis showed the GMV of the left lateral calcarine cortices in EB group was significantly smaller than that in the SC group (P < 0.05); nevertheless, the GMV of the left lateral middle occipital gyri was significantly larger (P < 0.05).
The constant sulci, such as the lateral, the central, the parieto-occipital, the calcarine and the cingulated, were also similar in the two primates.
If you show the eye an arrow, for example, there will be a physical representation of that arrow lying along the calcarine fissure (see Figure 5).
The presence of the calcarine sulcus in the occipital lobe is also clear, as well as the lateral sulcus between the parietal and temporal lobes.
The discriminative brain regions include postcentral gyrus, paracentral lobule, posterior cingulate cortex, calcarine, orbital superior frontal gyrus, superior frontal gyrus, Heschl gyrus, superior occipital gyrus, amygdala, middle temporal gyrus, orbital inferior frontal gyrus, and insula.
Some authors [14, 15] demonstrated that hemimicropsia can depend on a lesion in the inferior portion of the right parastriate area, sparing both the calcarine region and the geniculostriate projections, parts of Brodmann areas 18 and 19.
And the hubs identified by both b ( i ) and S ( i ) in HCs were the left and right precentral gyrus, left and right calcarine fissure and surrounding cortex, left and right insula and left median cingulate and paracingulate gyri.
In the medial view, the black dotted line highlights the calcarine sulcus, where the primary visual cortex is located.
A crucial role of the primary visual cortex has been emphasized for a long time in OLE and the relationship between the localization of the epileptic focus and the calcarine fissure seemed to determine the site and type of seizure spread [11, 13, 19].
Optic radiation: Optic radiation or geniculo calcarine pathway arises in the lateral geniculate nucleus and is the relay station of fibres carrying visual impulses to the occipital lobe.
They found that several brain regions of Patients with OCD showed above normal levels of activation during the relatively easy non-interference section of the color and word matching task (including the left parahippocampal gyrus, paracentral lobule, thalamus, and calcarine gyrus) and only a few regions showed lower levels of activation than controls (the anterior cingulate and left caudate nucleus); however, during the more difficult matching task when interference was present there were no brain regions in Patients with OCD with higher than normal activation and some brain regions showed lower than normal activation (e.g., bilateral orbital prefrontal cortex, left anterior cingulum and left caudate nucleus).
Each optic nerve conveys visual impulses, via the optic chiasm, tracts and radiations to the primary visual cortex in the calcarine area of the occipital lobe.[13]