Hippocampal basket cell gap junction network dynamics (Saraga et al. 2006)

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Accession:114047
2 cell network of hippocampal basket cells connected by gap junctions. Paper explores how distal gap junctions and active dendrites can tune network dynamics.
Reference:
1 . Saraga F, Ng L, Skinner FK (2006) Distal gap junctions and active dendrites can tune network dynamics. J Neurophysiol 95:1669-82 [PubMed]
Model Information (Click on a link to find other models with that property)
Model Type: Realistic Network;
Brain Region(s)/Organism:
Cell Type(s): Hippocampus CA1 basket cell; Abstract Wang-Buzsaki neuron;
Channel(s): I Na,t; I K;
Gap Junctions: Gap junctions;
Receptor(s):
Gene(s):
Transmitter(s): Gaba;
Simulation Environment: NEURON;
Model Concept(s): Activity Patterns; Oscillations; Active Dendrites; Action Potentials; Electrotonus; Delay;
Implementer(s): Saraga, Fernanda [Fernanda.Saraga at utoronto.ca];
Search NeuronDB for information about:  I Na,t; I K; Gaba;
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Basketcell
README.HTML
gap.mod
hh.mod
cella.hoc
cellb.hoc
default_init.hoc
extras.hoc
fig6.hoc
freq.hoc
gapdist.hoc
gapdist.ses
gapmid.hoc
gapmid.ses
gapprox.hoc
gapprox.ses
init.hoc
initdist.hoc
initmid.hoc
initprox.hoc
maxvalue.hoc
minvalue.hoc
mosinit.hoc *
phaselag.hoc
prog.hoc
screenshot.jpg
state.hoc
state_init0.hoc
state_init1.hoc
xyvalues.hoc
                            
/*
WHAT THIS DOES

It searches for the coordinates of the maximum inside the specified interval.

Note:	You need to open a new window for each signal you want to measure values.
	If recording a vector (as opposed to picking one after), you need to select the vector
	before hitting "Init & Run"


HOW TO USE

If using this tool individually (not via extra.hoc),
place this file along with other model hoc files.
In the oc> prompt, type...
load_file("maxvalue.hoc")

Find the Max Value window in 'Tools' -> 'Miscellaneous'


-- Leo Ng
   July 27, 2004
*/


begintemplate MaxValue

// rec record values of the signal.
// vec points to either rec or picked vector hoc_obj
public Select, max, time, start, finish, rec, box, vec
external hoc_obj_
objref this, rec, sc, box, vec
strdef sig, cmd, title

// Sets the default values and creates the vectors.
proc init() {
	time = 0
	amp = 0
	start = 0
	finish = 0
	sig = ""

	rec = new Vector()
	vec = rec
	sc = new SymChooser("Choose signal")
	CreatePanel()
}

// Creates the GUI.
proc CreatePanel() {
	box = new VBox()
	box.ref(this)
	box.intercept(1)

	xpanel("MaxValue")
	xbutton("Select Signal", "Select()")
	xvarlabel(sig)
	xvarlabel("")
	xradiobutton("Use recorded vector (above)", "vec = rec", 1)
	xradiobutton("Use picked vector", "vec = hoc_obj_[0]", 0)
	xvarlabel("")
	xpvalue("Interval Start (ms)", &start, 1, "Find()")
	xpvalue("Interval End (ms)", &finish, 1, "Find()")
	xvalue("Max Value", "max", 2)
	xvalue("at time (ms)", "time", 2)
	xpanel()

	box.intercept(0)
	sprint(title, "%s", this)
	box.map(title)
}

// Loads the vector choosing menu.
proc Select() {
	// Opens the SymChooser menu.
	// Stores the chosen variable in 'sig'.
	// Tells rec to record 'sig'.
	if (sc.run()) {
		sc.text(sig)
		sprint(cmd, "%s.rec.record(&%s)", this, sig)
		execute(cmd)
	}
}

// Find Max value and its index
proc Find() {
	if (finish > start) {
		max = vec.max(start / dt, finish / dt)
		time = vec.max_ind(start / dt, finish / dt) * dt
	}
}

endtemplate MaxValue

// Adds windows to NEURON's main menu.
objref maxValue
proc MakeMaxValue() {
	maxValue = new MaxValue()
	objref maxValue
}
nrnmainmenu_.miscellaneous_add("MaxValue", "MakeMaxValue()")

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