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. 8.16. . . () () (). . () — 60 +20 , . , (), (D). , 0 , . Fig. 8.16. Release of Glutamate by dial Cells. Release of glutamate generated by reversal of the glutamate uptake carrier in a Muller cell. (A) Depolarization--induced release of glutamate from a Muller cell (right) is monitored by recording glutamate-elicited currents from an adiacent Purkinie cell (left).

The Purkinje cell acts as a detector with high sensitivity and time resolution. (B) Depolarization of the Millier cell from -60 to +20 mV (top trace) elicits an inward current in the nearby Purkinje cell. The Purkinje cell current is generated by activation of its glutamate receptors. The response to glutamate disappears when the Purkinje cell is moved away from the Miiller cell (C) or when extracellular > is omitted (D). In fluid containing 0 mAf , reverse glutamate transport by the Millier cell is blocked. (After Billups and Attwell, 1996.)

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