Freebase(0.00 / 0 votes)Rate this definition: Crenulation. Crenulation or Crenulation cleavage is a texture formed in metamorphic rocks such as phyllite, schist and some gneiss by two or more stress directions resulting in superimposed foliations.
The occipital lobe is one of the four major lobes of the cerebral cortex in the brain of mammals. The occipital lobe is the visual processing center of the mammalian brain containing most of the anatomical region of the visual cortex.The primary visual cortex is Brodmann area 17, commonly called V1 (visual one).hus, the occipital lobe is defined as the part of the cerebral cortex that lies underneath the occipital bone. (See the human brain article for more information.). The lobes rest on the tentorium cerebelli, a process of dura mater that separates the cerebrum from the cerebellum.
View All. The occipital lobe is a region in the the back of the brain that plays a major role in integrating our vision, allowing us to recognize what our eyes see. An occipital lobe stroke can affect one or both occipital lobes. In general, occipital lobe strokes are not common. Effects of Occipital Lobe Stroke. An occipital lobe stroke can cause a variety of visual changes, which include partial vision loss, complete blindness and visual hallucinations, as well as some unique visual syndromes. 1  The occipital lobe is not completely uniform, and the regions within the occipital lobe have different functions in integrating vision.