Fig. 8. Four examples of Fast resistance whole neuropil (FR/W) depressor motor neurons (Dep MN) that have neuritic processes extending throughout most of the neuropil when viewed from above. According to our classification scheme, these four neurons (A–D) belong in the same group as the neuron represented in Fig. 6. These neurons have relatively large extracellular spikes (insets), and show a resistance response (R). They receive monosynaptic excitatory (E) input, polysynaptic (P) excitatory input and polysynaptic inhibitory (I) input. Also, similar to the neuron shown in Fig. 6, these neurons presumably receive monosynaptic input on the lateral-most branches in the posterior-lateral quadrant. Note that the neurons in C and D lack medial-most branches. Although it is possible that neurons in C and D may represent another class of neurons, due to the great anatomical and physiological similarity of these neurons with those in A and B and in Fig. 6A, we consider them also to belong to the class FR/W.