Lesion extent versus | Pearson’s correlation, r | Correlation significance, p |
---|---|---|

Final pitch change | 0.4261 | 0.1466 |

Baseline variance | 0.296 | 0.3261 |

Final variance | –0.0498 | 0.8716 |

Percent increase in variance | –0.4272 | 0.1454 |

The lesion extent for each bird was defined as the proportion of sections with OD ratio below the 5th percentile of OD ratios for the population of saline-injected birds. A Pearson’s correlation coefficient (

*r*) and the associated*p*value is reported for this lesion extent versus changes in song metrics. Variances were computed across either 3 d of baseline or the final 3 d of the shift period.