%------------------------------------------------------------------------------------------ % % Title: Calcium Signals in Small Structures % Filename: CaSignal_Exp4Disc.par % Author: Ronald van Elburg % % Associated Paper: % Cornelisse LN, van Elburg RAJ, Meredith RM, Yuste R, Mansvelder HD (2007) % High Speed Two-Photon Imaging of Calcium Dynamics in Dendritic Spines: % Consequences for Spine Calcium Kinetics and Buffer Capacity. % PLoS ONE 2(10): e1073 doi:10.1371/journal.pone.0001073 % % % % %------------------------------------------------------------------------------------------ Structure = Disc_Structure R_Structure = 2/Sigma % Radius of the simulated structure: Cylinder or Sphere (um) % path = ".\" % If running under Windows, specify here the path to the % directory containing the script imported below file = path "CaSignal_main.par" include file % Import the simulation parameters from the main script % Auxilary variables for monitoring concentrations at different distances from the membrane NoOfSteps = 6 % number of shells in the output (NOT IN THE SIMULATION, THERE THE GRIDSIZE DEFINES THE COMPARTMENTS) dR=R_Structure/NoOfSteps R1k=(NoOfSteps-0.5)*dR R6k=(NoOfSteps-5.5)*dR Ca1 := Ca[R1k] ; Dye1 := Dye[R1k] Ca6 := Ca[R6k] ; Dye6 := Dye[R6k] CaAverage:=Ca[] ; DyeAverage:=Dye[] % Exporting the variables defined above to file, the first three variables need % adjustment defining new scripts, to prevent these scripts from overwriting old % results and using the wrong Loop variables, make sure that the LoopVars are % integer version of the real loopvars used in for loops. Exp=4 LoopVar=10*Sigma LoopVar2=Total_EndogenousBuffer Geom='D' plot point.mute Ca1 "Output\Exp""Exp""\CSE""Exp""Geom""_Ca1_""LoopVar""_""LoopVar2" plot point.mute Ca6 "Output\Exp""Exp""\CSE""Exp""Geom""_Ca6_""LoopVar""_""LoopVar2" plot point.mute CaAverage "Output\Exp""Exp""\CSE""Exp""Geom""_CaAverage_""LoopVar""_""LoopVar2" plot point.mute Dye1 "Output\Exp""Exp""\CSE""Exp""Geom""_Dye1_""LoopVar""_""LoopVar2" plot point.mute Dye6 "Output\Exp""Exp""\CSE""Exp""Geom""_Dye6_""LoopVar""_""LoopVar2" plot point.mute DyeAverage "Output\Exp""Exp""\CSE""Exp""Geom""_DyeAverage_""LoopVar""_""LoopVar2" % Parameter variation for Sigma = 0.5 to 20 step 0.5 for Total_EndogenousBuffer = 0 to 400 step 10 % The adaptive integration method fails for the fast calcium change % to overcome this problem we run the first 20 ms with a fixed timestep % of 0.001 ms, then after the fast changes we switch to the adaptive method % for optimal performance. Run 20.0 1.0e-3 ; current CalciumCurrent Run adaptive 480.0 1.0e-3 accuracy; current CalciumCurrent