Dopamine concentrations in the dorsal striatum.

<p>A) Mean extracellular DA levels expressed as a percentage of baseline samples in the dorsal medial striatum (DMS) of control rats during each 20 min sampling period. B) same as A but for rats exposed to uncontrollable stress (Stress). C) Combined mean post-shock (FS-P4) extracellular DA levels expressed as a percentage of baseline samples (<i>grey dashed line</i>) in the DMS for each group. D) Mean extracellular DA levels expressed as a percentage of baseline samples in the dorsal lateral striatum (DLS) of control rats during each 20 min sampling period. E) same as D but for rats exposed to uncontrollable stress (Stress). F) Combined mean post-shock (FS-P4) extracellular DA levels expressed as a percentage of baseline samples (<i>grey dashed line</i>) in the DLS for each group. ^a<i>P</i><0.05 at P1 from P4 within Running Control; ^b<i>P</i><0.05 FS from B2 or B3 within Running Stress; ^c<i>P</i><0.05 P1 from B3 within Running Stress; ^D<i>P</i><0.05 P2 from B1, B2, or B3 within Running Stress; ^e<i>P</i><0.05 at Running Stress from Sedentary Stress for respective sampling period; ^f<i>P</i><<i>0</i>.<i>01</i> from Sedentary Control, Sedentary Stress, Running Control; ^g<i>P</i><0.001 main effect of exercise condition; ^h<i>P</i><0.01 from baseline (<i>grey dashed line</i>)