## Record current of a Linear mechanisem

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oren
Posts: 55
Joined: Fri Mar 22, 2013 1:03 am

### Record current of a Linear mechanisem

Hello I am using this code to create a gap junction via a linear mechanism,

Code: Select all

``````begintemplate LinearMGap
public src, target, g, valid, pr, set_gm, gm, cm
objref srcsec, targetsec, cm, gm, y, b, xvec, sl, lm, this, fih
strdef tstr

proc init(){
g_ = 10
valid_ = 0
cm = new Matrix(2,2,2)
gm = new Matrix(2,2)
y = new Vector(2)
b = new Vector(2)
xvec = new Vector(2)
}

func src() {
srcsec = new SectionRef()
xvec.x[0] = \$1
valid_ = 0
return valid()
}

func target() {
targetsec = new SectionRef()
xvec.x[1] = \$1
valid_ = 0
return valid()
}

func g() {
if (numarg() > 0) {
g_ = \$1
if (valid_) {
set_gm()
}
}
return g_
}

proc set_gm() { local us, a// conductance in nanosiemens
if (valid_ == 0) { return }
us = .001*g_
srcsec.sec { a = 100/area(xvec.x[0]) }
gm.x[0][0] = us*a
gm.x[0][1] = -us*a
targetsec.sec { a = 100/area(xvec.x[1]) }
gm.x[1][1] = us*a
gm.x[1][0] = -us*a
}

func valid() {
if (valid_ == 0) {
if (object_id(srcsec) && object_id(targetsec)) {
mkgap()
}
}
return valid_
}

proc mkgap() {
sl = new SectionList()
srcsec.sec sl.append()
targetsec.sec sl.append()
valid_ = 1
set_gm()
lm = new LinearMechanism(cm, gm, y, b, sl, xvec)
// only necessary because we anticpate changes in diameter
// fih = new FInitializeHandler(0, "set_gm()")
// unfortunately up through the  5.6 2004/02/09 Main (44)
// version there is an error in parsing the third arg, so
sprint(tstr, "%s.set_gm()", this)
fih = new FInitializeHandler(0, tstr)
}

proc pr() {
if (valid_) {
srcsec.sec printf("%s %s(%g)", this, secname(), xvec.x[0])
targetsec.sec printf("---%s(%g) \tg = %g (ns)\n", secname(), xvec.x[1], g())
}else{
printf("%s not used\n", this)
}
}
endtemplate LinearMGap
``````

http://senselab.med.yale.edu/ModelDB/Sh ... %5Cgap.hoc

How can I record the current that go through the gap junction?
I have tried recording b and y but did not managed to get the current ...

Thank You,
Oren
oren
Posts: 55
Joined: Fri Mar 22, 2013 1:03 am