Efferent
responses are larger in irregular, as compared to regular units.
Comparison of responses in three regular (A) and three irregular units (B). Ipsilateral stimulation, 5-s shock trains, 333/s in
all cases. For each panel, units had similar background discharges:
A 66.8 (a), 65.4 (b), 65.8 (c)
spikes/s and B 41.2 (a), 49.8 (b), and
44.0 (c) spikes/s. All units were HC except Bb, an SC unit. Calyx units
are Ba and Bc. Responses are plotted from an averaged discharge rate of
66 (A) and 45 spikes/s (B).