Figure 4.

Response of LDT/SubLDT pNonACh units to long light pulses in TG-A mice. A1, A pNonACh unit was identified by the failure to spike during short light pulses (here ∼100 ms; unit #3 in mouse ChAT6). A2, Nevertheless, a long (∼5 s) continuous light pulse produced an increase in discharge, as illustrated in expanded segments (1, 2 below). B1, Another pNonACh unit (#8 in mouse ChAT48) was identified by the failure to spike during short light pulses (here ∼100 ms). B2, In this unit, firing decreased during a long (∼5 s) continuous light pulse, as illustrated in expanded segments (1, 2 below).