Oh, so when the current is generated far away, the voltage clamp kind
of acts like a lot of open channels, i.e that end of the cable appears
to have low resistance?
On Aug 8, 1:33 am, r norman <r_s_nor... from comcast.net> wrote:
> With voltage clamp, there is essentially a "short circuit" across the
> cable at the point of the clamp. This causes a rather drastic
> alteration in the pattern of current flow pattern when the clamp is
> close to the synapse. However when the clamp is farther down the
> cable, the current flow near the synapse is virtually unchanged. As a
> result, when the clamp is near the synapse it "steals" pretty much all
> the current, far more than would pass that way unclamped. When the
> clamp is far from the synapse, it only gets what current would
> normally end up passing that far anyway. Hence an apparent "faster
> decay with distance" in voltage clamp than unclamped.
