Serotonin concentrations in the dorsal striatum.

<p>A) Mean extracellular 5-HT 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 5-HT levels expressed as a percentage of baseline samples (<i>grey dashed line</i>) in the DMS for each group. D) Mean extracellular 5-HT 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 5-HT levels expressed as a percentage of baseline samples (<i>grey dashed line</i>) in the DLS for each group. ^a<i>P</i><0.01 different from B1, B2, B3, or B4 in Sedentary Stress; ^b<i>P</i><0.05 Sedentary Stress from Sedentary Control at FS and P1 sampling periods; ^c<i>P</i><0.05 Sedentary Stress from Running Stress at FS sampling period; ^d<i>P</i><0.05 P3 from B1 or B4 in Sedentary Stress group; ^e<i>P</i><0.05 Sedentary Stress from Sedentary Control, Running Control, and Running Stress; ^f<i>P</i><0.05 from Running Control and Running Stress; ^g<i>P</i><0.05 from baseline (<i>grey dashed line</i>)