larval DN period neuron larval DN1 neuron DN1L VFB:FBbt_00001915 FBbt:00001915 Expression of Period was determined by per-lacZ fusion expression (Kaneko et al., 1997). fly_anatomy.ontology larval dorsal neuron-1 dorsal neuron-1 larval A neuron whose soma is located in the dorso-anterior region of the larval brain cortex and projects to the larval optic neuropil (Keene et al., 2011). Some of the processes run along the axons of the larval s-LNv neurons and arborize near the s-LNv dendrites. It exhibits strong circadian cycling of Period (FBgn0003068) expression starting at about 15 hours post-hatching. There are one or two of these cells per hemisphere.