L'assenza del ''septum pellucidum'' o del corpo calloso, causata dalla mutazione del [[gene]] ''[[HESX1]]'', è associata alla [[displasia setto-ottica]].
==Immagini aggiuntive==
<gallery>
Image:Gray715.png|Mesal aspect of a brain sectioned in the median sagittal plane.
Image:Gray742.png|Horizontal section of right cerebral hemisphere.
Image:Gray743.png|Coronal section through anterior cornua of lateral ventricles.
Image:Gray744.png|Coronal section of brain through anterior commissure.
Image:Gray748.png|The [[fornix]] and [[corpus callosum]] from below.
Image:Gray768.png|Diagram showing the positions of the three principal subarachnoid cisternæ.
