embryonic/larval superior intermediate protocerebrum [FBbt_00007721]

embryonic/larval superior intermediate protocerebrum

ID: FBbt_00007721

A small synaptic neuropil that has the shape of a hemi-cylinder. It flanks the mushroom body vertical lobe laterally and posteriorly, where it wedges in between superior lateral protocerebrum (SLP) and superior medial protocerebrum (SMPp). Its boundary can be followed posteriorly from the SLP-prAOTU boundary (at the DALd lineage entry point), past the distal segment (internal, lateral) curve of the trSA (DPLal1-3) and continuing further posteriorly until the entry point of DPLc. It borders the lateral clamp and (briefly) crepine compartments and (very anteriorly and ventrally) the spur. It is distinguishable from these by its higher density of synapses (e.g. as assayed by Bruchpilot expression).