Figure 5.

Model of intra-SR diffusion during a Ca spark. A. Organization of junctions incorporated (not including above and below the plane). B. [Ca]_SR during a normal ECC-associated SR Ca release for ${\mathrm{D}}_{\text{Ca}}^{\text{SR}}=60$ µm/s². C. ${\mathrm{D}}_{\text{Ca}}^{\text{SR}}$ –dependence of the [Ca]_SR gradient and delay time for nadir between FSR and JSR (modified from Picht et al. [25] with permission).