Figure 4.

Responses of neostriatal neurons to songs and their component phrases. (A) Peristimulus time histograms of the response of a single unit 200 μm below HVc shows its strong response to the whistles present in normal white-crowned sparrow song (Left), isolate song (Center), and song sparrow song (Right). (B) This small cluster of units 300 μm below HVc had strong responses to the trills present in both conspecific (Left and Center) and foreign (Right) songs. (C) A single unit in HVc responded strongly to isolate song (Left). This cell also responded with increasing strength as the duration of a tone burst increased (four panels on the right); this tone burst shared the frequency range of the whistle in the isolate song.