Lateral accessory lobes, or LALs are paired, symmetrical, systems of synaptic neuropils that exist in the brains of insects and other arthropods. Lateral accessory lobes are located inferiorly and laterally from ellipsoid body, anteriorly and laterally from the bulb. In the frontal section of the arthropod brain the LALs are projected as two triangles, called lateral triangles. The LALs have roughly pyramidal shape.