Age, PHD | Total spine number | Spine density, (^{#}/μm) | Soma area (μm^{2}) | Total dendrite length (μm) | Total axon collateral length (μm) | |
---|---|---|---|---|---|---|

Fledgling (n = 14–15) | 27.5 ± 0.77 | 417 ± 37 | 0.273 ± 0.019 | 214 ± 16 | 1559 ± 89 | 913 ± 90 |

(n = 15) | (14) | (15) | (15) | (14) | (14) | |

Juvenile (n = 15) | 44.4 ± 0.95 | 834 ± 72 | 0.481 ± 0.033 | 301 ± 20 | 1743 ± 112 | 1829 ± 150 |

*p < 0.0001^{a} | *p < 0.0001^{b} | *p < 0.002^{c} | *p < 0.0001^{a} | |||

Adult (n = 13) | 151.1 ± 14.0 | 614 ± 74 | 0.388 ± 0.053 | 253 ± 19 | 1612 ± 116 | 1259 ± 224 |

*p < 0.03^{a} | *p < 0.04^{b} | **p < 0.04^{c} | ||||

**p < 0.05^{c} | **p < 0.03^{b} | |||||

LMAN-lesioned juvenile (n = 16) | 46.6 ± 0.49 | 611 ± 82 | 0.355 ± 0.05 | 225 ± 12 | 1768 ± 77 | 1622 ± 135 |

**p < 0.052^{c} | **p < 0.05^{b} | **p < 0.003^{a} |

All values: mean ± SEM. *Versus Fledgling; **versus juvenile; statistically significant differences in

**bold.**F1-a Two-tailed Student's

*t*test assuming unequal variance: when both distributions were normal and the variances of the two distributions were significantly unequal based on one or more of the O'Brien, Brown-Forsythe, Levene, and Bartlett tests.F1-b Mann–Whitney

*U*test: used when one or more of the distributions under comparison was significantly non-normal based on the Shapiro-Wilk test.F1-c Two-tailed Student's

*t*test assuming equal variance: used when both distributions were normal and their variances equal.