calcarine fissure

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calcarine fissure

[′kal·kə‚rēn ′fish·ər]
(anatomy)
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Autometallographic determination of inorganic mercury distribution in the cortex of the calcarine sulcus of the monkey Macaca fascicularis following long-term subclinical exposure to methylmercury and mercuric chloride.
The most characteristic imaging pattern in PRES is the presence of edema involving the white matter of the posterior portions of both cerebral hemispheres, especially the parietooccipital regions, in a relatively symmetric pattern that spares the calcarine and paramedian parts of the occipital lobes.
All primates have a calcarine fissure that enlarges the visual cortex of the medial occipital lobe and a lateral sulcus that expands the cortex devoted to somatosensory processing (that is, the sense of body position, pain, temperature, and so on--rather than senses such as vision and hearing).
A computed tomography (CT) scan of the brain showed a hemorrhagic stroke involving the right calcarine cortex (Fig 1).
Magnetic resonance imaging revealed an acute infarction of the right occipital lobe involving the calcarine cortex (Figure).
This area is in the calcarine sulcus, which is labeled on Figure 1.