//, /* */ pairs.
In broad outline, the procedure profile()
walks the synapse along the length of dend.
At each node (the 0 and 1 ends plus the center of each
segment), the time course of somatic Vm is computed and
stored in the vector vm, which is then
examined to find its maximum value.
The synaptic location and the peak amplitude of the
somatically observed epsp are then stored in the vectors
location and amplitude, respectively.
Finally, the graph g displays a plot of
amplitude vs. location.
// objects must first be declared _outside_ procedures
objref location, amplitude
location = new Vector() // stores locations along the dendrite
amplitude = new Vector() // stores peak amplitude at each location
objref vm
vm = new Vector() // to hold the time course of somatic Vm
// evoked by a synaptic input
/* use Vector class .record() to "attach" vm to soma.v(0.5) */
objref g
g = new Graph() // for plot of amplitude vs. location
proc profile() {
// next three statements discard prior results, if any
location = new Vector()
amplitude = new Vector()
g = new Graph()
dend for (x) { // loop over each node in dend
putsyn(x)
// at this point, vm should contain a record of soma.v(0.5)
/* find maximum element in vm */
/* append this to amplitude vector */
/* append x to location vector */
}
/* plot amplitude vs. location */
}