what separates the cerebellar hemispheres
falx cerebelÂ´li the fold of dura mater separating the cerebellar hemispheres. falx ceÂ´rebri a sickle-shaped fold of dura mater in the longitudinal fissure, which separates the two cerebral hemispheres.l. falces [L.] a sickle-shaped structure. falx cerebelli. the fold of dura mater separating the cerebellar hemispheres. falx cerebri. a sickle-shaped fold of dura mater in the longitudinal fissure, which separates the two cerebral hemispheres.