calcarine fissure meaning

Noun: calcarine fissure

1. A sulcus in the mesial surface of the occipital lobe of the cerebrum
   - calcarine sulcus

Derived forms: calcarine fissures

Type of: sulcus

Part of: occipital cortex, occipital lobe

Encyclopedia: Calcarine fissure

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1. Myelination of the ventricular walls and association fibers of the corpus callosum and the calcarine fissure helps shape the occipital horns.
2. The primary visual cortex, V1, is the koniocortex ( sensory type ) located in and around the calcarine fissure in the occipital lobe.
3. They carry visual information through two divisions ( called upper and lower division ) to the visual cortex ( also called " striate cortex " ) along the calcarine fissure.
4. Experiments with humans have shown that when the visual cortex is stimulated above the calcarine fissure, phosphenes are produced in the lower part of the visual field, and vice versa.
5. During that same year, Hirsch and colleagues recorded a visual evoked potential ( VEP ) on the occipital lobe ( externally and internally ), and they discovered amplitudes recorded along the calcarine fissure were the largest.