Abstract
A simple superperfusion apparatus for measuring endogenous dopamine (DA) release from rat retina is described. DA release is stimulated by increasing levels of potassium (K) in the superfusion medium and this K-stimulated release is calcium dependent. Exposure of dark-adapted retinae to light also increases endogenous DA release. This system should prove useful in determining what factors may control endogenous DA release in the retina.
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