SCN5A and posterior cortical atrophy: Notably, the value is in range of direct recordings for PCa/PNa in the sciatic nerve and squid axons (0.10 and 0.14, Hille, 1972; Meves and Vogel, 1973) as well as recordings from NaV1.5 channels revealing PCa/PNa ratios of ~0.04 (Cruz et al., 1999).