Table 1. Model Parameters.

Parameter	Value	Description
C	1μ F/cm2	Membrane capacitance
${\bar{g}}_{Na}$	100mS/cm2	Conductance of Sodium Current
${\bar{g}}_K$	40mS/cm2	Conductance of potassium current
${\bar{g}}_{KL}$	0.05mS/cm2	Conductance of potassium leak current
${\bar{g}}_{NaL}$	0.02mS/cm2	Conductance of sodium leak current
${\bar{g}}_{ClL}$	0.05mS/cm2	Conductance of chloride leak current
ϕ	3sec−1	Time constant of gating variables
β	varies	Ratio of intra- to extracellular volume of the cell
ρ	3.85μA/cm 2	Maximum pump strength
B glia	5mM/sec, varies in Figs 3, 4	Maximum strength of glial uptake
ϵ O	0.34sec −1	Diffusion constant of O 2
O 2,∞	30 mg/L	O 2 concentration in the perfusion solution
α	6	conversion factor from mM/sec to mg/L/s
ρ KCC	0.5 mM/sec	maximum strength of K + − Cl − cotransporter