Object Type:    SynS_object
 
Description:    Implements voltage-dependent modulation of spike-mediated
                synaptic transmission.
 
Author:         Calabrese Lab, 3/97
 
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ELEMENT PARAMETERS
 
DataStructure:  SynS_type  [in src/newconn/SynGS_struct.h]
 
Size:           148 bytes
 
Fields:         m_SynS       modulation factor = A+B/(1+exp(C*(Vm+D)))
                A            A
                B            B
                C            C
                D            D
                E            E = time constant  

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SIMULATION PARAMETERS
 
Function:       SynS  [in src/newconn/SynS.c]
 
Classes:        device synchannel
 
Actions:        RESTORE2  SAVE2  CHECK  RESET  PROCESS  INIT
 
Messages:       VOLTAGE         membrane potential Vm

 
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Notes:          Calculates the voltage dependent modulation of spike mediated
                transmission in the leech HN cells.  Therefore, it needs the
		presynaptic membrane potential.  Modulation is a sigmoidal
		function of the membrane potential given by
		m_SynS = A+B/(1+exp(C*(Vm+D))), with a time constant E.

Example:        See http://calabreselx.biology.emory.edu/software.html.

See also:       synchan, SynE_object, SynG_object
