>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
		>>    module's name: A		>>
		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>


		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
A:		> 	Activation function (time constant method)	>
		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>------------------------------->--------------------------------------->
>				>					>
>	1			>	A = ssA			(1)	>
>				>					>
>------------------------------->--------------------------------------->
	2			>	        ssA - A			>
	0.49	>IV<		>	dA/dt= ------------	(2)	>
				>	           tA			>
>------------------------------->--------------------------------------->

		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
ssA:		> 	Steady state value for activation		>
		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>----------------------->------------------------------------------------------>
 	1		>			1			       >
 	-45    >-45 h<	>	ssA = --------------------		(1)    >
 	 15.0	>15 s<	>		+-	     -+ p		       >
 	  1      >1 p<	>		|     (h-V)/s |			       >
 			>		|1 + e        |			       >
 			>		+-	     -+			       >
 			>						       >
>----------------------->------------------------------------------------------>
>	2		>		   1 - An			       >
>	 xx >An<	>	ssA = -------------------- + An		       >
>	 xx >h<		>		+-	     -+ p		       >
>	 xx >s<		>		|     (h-V)/s |			(2)    >
>	 xx >p<		>		|1 + e        |			       >
>			>		+-	     -+			       >
>----------------------->------------------------------------------------------>


		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
tA:		> 	Time constant for activation			>	
		>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>----------------------->------------------------------------------------------>
>	1		> tA = tx					    (1)>
>	 xx >tx<	>						       >
>----------------------->------------------------------------------------------>
>	2		>	  tx -tn				       >
>	 xx >tx<	> tA = -------------------- + tn	            (2)>
>	 xx >tn<	>	+-	     -+ p			       >
>	 xx >h<		>	|     (V-h)/s |				       >
>	 xx >s<		>	|1 + e        |				       >
>	 xx >p<		>	+-	     -+				       >
>			>						       >
>----------------------->------------------------------------------------------>
	3		>	 		tx -tn			       >
    0.017     >.017 tx< > tA = ----------------------------------- + tn     (3)>
    0.00034 >.00034 tn< >	+-	     -+p1 +-	       -+p2	       >
  -20.0        >-20 h1< >	|   (V-h1)/s1 |	  |   (V-h2)/s2 |	       >
   20.0         >20 s1< >	|1+e          |	  |1+e          |	       >
    1            >1 p1<	>	+-	     -+	  +-	       -+	       >
 -110.0       >-110 h2<	>						       >
  -24.0        >-24 s2<	>						       >
    1            >1 p2<	>						       >
>----------------------->------------------------------------------------------>
>			>	  +--			      -+	       >
>	4		>	  |   1 - rtn		       |	       >
>	xx	>tx<	> tA = tx | -------------------- + rtn |            (4)>
>	xx	>rtn<	>	  | +-	          -+ p	       |	       >
>	xx	>h<	>	  | |     (V-h)/s  |	       |	       >
>	xx	>s<	>	  | |1 + e         |	       |	       >
>	xx	>p<	>	  | +-	          -+           |	       >
>			>	  +-- 			      -+	       >
>			>						       >
>----------------------->------------------------------------------------------>
>	5		>	| 	1 - rtn		                  |    >
>	xx	>tx<	> tA=tx | ---------------------------------- +rtn | (5)>
>	xx	>rtn<	>	| +-	      -+p1+-	      -+p2        |    >
>	xx	>h1<	>	| |   (V-h1)/s1|  |   (V-h2)/s2|          |    >
>	xx	>s1<	>	| |1+e         |  |1+e         |          |    >
>	xx	>p1<	>	| +-	      -+  +-	      -+          |    >
>	xx	>h2<	>	+-- 			   	        --+    >
>	xx	>s2<	>						       >
>	xx	>p2<	>						       >
>----------------------->------------------------------------------------------>