The term parafloccular sulcus refers to a space in the cerebellum of the mouse ( Paxinos-2001 ) and the rat ( Swanson-1998 ) that separates the paraflocculus from several other cerebellar lobules located dorsal to it at different levels. These include the rodent homologs of a part of the biventer lobule (copula), the gracile lobule (paramedian lobule), the inferior semilunar lobule (crus 2), the superior semilunar lobule (crus 1), and the simple lobule ( Swanson-1998 ).