part of superior lateral protocerebrum synaptic neuropil subdomain anterior superior lateral protocerebrum 2009-08-13T04:47:29Z FBbt:00040045 middle slpr Boundaries defined by Ito et al. (2014) (used to define this term) differ slightly from those defined for mslpr in Otsuna and Ito, 2006. There is no prominent natural boundary that clearly separates the posterior and anterior superior lateral protocerebrum. A frontal plane extrapolated from the boundary of the PVLP and PLP, which corresponds to the anterioposterior level of the great commissure, is used as a practical boundary. fly_anatomy.ontology VFB:FBbt_00040045 ASLP mslpr Anterior subregion of the superior lateral protocerebrum.