Figure 9. Relationship of hemilineages to neuron type and to classes of evoked behavior.
(A) Summary of the range of behaviors in decapitated flies elicited by stimulation of the neurons in each of the hemilineage groups using TRPA1 expression and a heat ramp to activate the temperature-sensitive channel. Behaviors are divided into six categories explained in the text. Hemilineages are arranged according to the complexity of their behavioral responses. Most behavioral responses were sustained but a few hemilineages (*) showed a progression of behaviors during the heat ramp. Diagrams show the extent of the hemilineage's arbor in transverse views of the ventral nervous system at the level of the mesothorax (T2). The numbers of flies analyzed in each group ranged from 15 to 25. (B) Registration of the hemilineage arbors to a common outline and then overlapping the hemilineage groups in which at least 50% of the individuals showed the indicated types of behavior.