Fig. 9.

Bouton overlap of L4 cells depends on soma separation and ∆ori. Similar to L6 cell pairs, soma separation and bouton overlap index (BOI) for L4 cell pairs show negative correlation. a ₁ For larger than 2 mm soma separation, almost no overlap can be seen. a ₂ Same data as in A₁, except that pairs with larger than 2 mm separation are excluded. Gray curve represents fitted exponential (R ² = 0.26, p < 0.0001, N = 124, decay constant of the fit: 865 µm). b BOI also showed a reverse correlation with ∆ori of parent somata (R ² = 0.08, p = 0.002, N = 124, decay constant of the fitted exponential is 70.1°). c Cell pairs preferring similar orientations (∆ori ≤30°, iso) showed significantly larger BOI than those with orientation difference falling in oblique (30° < ∆ori ≤ 60°) or cross-orientation (60°< ∆ori) categories