Layer-dependent stability of intracortical recordings and neuronal cell loss.

Consistent with previous reports ( Vetter et al., 2004 ), there were highly significant differences in both impedance magnitude ( Figure 5B : χ 2 = 311.86, p < 2.2 × 10 −16 , df = 8; Kruskal–Wallis test) and phase angle ( Figure 5C : χ 2 = 164.72, p < 2.2 × 10 –16 , df = 8; Kruskal–Wallis test) during the first WPI.

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