Frequency mapping data for an individual starling (SLLR97-5) in the lesion–long recovery group. A , B , Tonotopicity data for individual penetrations (details as in Fig. 1 A,B). C , D , Pooled data from all points up to frequency reversals in the penetrations shown in A and B ; details as in Figure 6. Note (in D ) that one point with BF ≤2 kHz had CF >2 kHz, and two points with BF >2 kHz had CF ≤2 kHz. E , Threshold as a function of CF for all recording sites plotted in C (details as in Fig. 6 E).