In article <BILL.93Nov5130224 at dentate.nsma.arizona.edu>, bill at nsma.arizona.edu (Bill Skaggs) writes...
>markb at orl.mmc.com (Mark Bower) writes:
>> William White asked>i>
>4) If there is no intracellular magnesium, then glutamate alone is
>sufficient to cause current flow -- postsynaptic depolarization is no
>longer necessary. (Ordinarily, glutamate opens the channel but it
>gets clogged by magnesium ions unless there is enough postsynaptic
>depolarization to pull the magnesium away from the channel opening.)
> I thought extracellular Mg++ blocks the channel!!!
>If you speak C,
>> Current = Glutamate && (Depolarization || !Magnesium) && Glycine;
>> -- Bill