|Brain: Occipital horn of lateral ventricle|
|Drawing of a cast of the ventricular cavities, viewed from above.|
|Drawing of a cast of the ventricular cavities, viewed from the side.|
|Gray's||subject #189 829|
The occipital horn of the lateral ventricle posteriorly (also posterior cornu of the lateral ventricle, postcornu of the lateral ventricle) passes into the occipital lobe, its direction being backward and lateralward, and then medialward.
Its roof is formed by the fibers of the corpus callosum passing to the temporal and occipital lobes.
On its medial wall is a longitudinal eminence, the calcar avis (hippocampus minor), which is an involution of the ventricular wall produced by the calcarine fissure.
The calcar avis and bulb of the posterior cornu are extremely variable in their degree of development; in some cases they are ill-defined, in others prominent.
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