Table 4.

Probability values of the comparisons between groups of arbors (Mann–Whitney U test)

Total length (μm)Coverage area (μm2)Branch points (n)Maximal density (μm/1000μm2)High-density areas (μm2)
OD vs OND↑0.02↑0.003nsnsns
OD vs 6/7d-D↑0.01↑0.03↑0.02↑0.003↑0.02
OND vs 6/7d-ND↓0.001ns↓0.001↓0.04↓0.004
OD vs 6/7d-NDnsns↓0.03↓0.03ns
OND vs 6/7d-Dnsns↑0.05↑0.0002↑0.006
OND vs normals P30↓0.01ns↓0.05nsns
OD vs normals P30nsnsnsnsns
OND vs normals P40↓0.001↓0.002↓0.002ns↓0.05
OD vs normals P40ns↓0.05nsnsns
OND vs normal P49↓0.002↓0.002↓0.002nsns
OD vs normal P49↓0.004↓0.01↓0.01nsns
  • OD, Originally deprived; OND, originally nondeprived; 6/7d-D, deprived after 6/7 d of monocular deprivation; 6/7d-ND, nondeprived after 6/7 d of monocular deprivation; normals P30/P40/P49, normal arbors reconstructed in normal animals at postnatal day 30/40/49, respectively. Upward and downward arrows indicate whether the value of first term (OD or OND arbors) is significantly larger or smaller, respectively, than the second term of the comparison. Because the interest of this analysis was in the individual features of arbor development shown in each column, rather than in the significance of differences between groups, the values shown above are not corrected for multiple comparisons. However, all of the differences between groups, with the exception of OD vs normal P40, remain significant (p < 0.05) with the Bonferroni correction (Glantz, 1992). ns, Not significant.