In released ferret spine records, tuning diversity had rank correlations of 0.56 with positive 1 µm mitochondrial volume and −0.003 with entry status

We separated mitochondrial amount from positive entry status in released ferret visual cortex spine data. We exactly matched 77 short-radius records to 138 long-radius records with four anatomy measurements. Among 31 records with positive mitochondrial volume within 1 micrometre and local tuning data, the Spearman correlation was 0.5633. It was 0.5879 after adjustment for volume within 5 micrometres and soma distance, and 0.6469 with three more anatomy controls. Every two-row deletion kept the fully adjusted value positive, from 0.4975 to 0.7676. Among 76 records with local tuning data, the rank correlation with positive entry status was −0.0031. Mean tuning diversity was 38.08 degrees in 31 positive records and 38.23 degrees in 45 other records. Positive entry status refers to the export, not a verified biological absence. If blank and omitted volume entries are zero, the full volume correlation is 0.0952, or 0.0289 with all controls. The source exclusion rule supports this zero interpretation but does not label each entry. The positive-only relation was known. This work adds the matched table, controls and entry-status contrast. The exports lack cell, dendrite and animal labels, so the results do not establish a population effect or causal support. The package includes source data and hashes, code, all estimates and row diagnostics, figures, an exact rank split and offline repeat instructions.

mitochondria · dendritic spines · structure and function · visual cortex · ferret · orientation tuning · missing data · rank correlation