The largest and deepest<unk>  in the<unk>  is named the<unk><unk>  (or<unk>  sulcus). It commences in front of the pons, and passes<unk> ly around the free margin of the hemisphere to the middle line behind, and divides the<unk>  into an upper and a lower portion.
Horizontal fissure of cerebellum
Medial eminence of floor of fourth ventricle
Anterior median fissure of the medulla oblongata
Posterolateral sulcus of medulla oblongata
Postcentral sulcus
Cingulate sulcus
Cortical homunculus
Interventricular foramina 