Fig. 2.

(a) The Cl⁻ reversal potential varies along the length of the dendrite due to the presence of one Cl⁻ cotransporter (Na⁺-K⁺-Cl⁻) in the proximal dendrite near the soma and a second type of Cl⁻ cotransporter (K⁺-Cl⁻) in the distal dendrite (Gavrikov et al. 2006). Therefore a GABA-evoked increase in Cl⁻ conductivity depolarizes the proximal dendrite and hyperpolarizes the distal dendritic tip. (b) GABA, glutamate, and K⁺ reversal potentials (as well as the resting potential-dotted line), as a function of SAC dendritic position. See Dmitriev, Gavrikov and Mangel (manuscript in preparation) for an experimental derivation of these reversal potentials