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Fig. 6 | The Journal of Physiological Sciences

Fig. 6

From: Bidirectional cardiovascular responses evoked by microstimulation of the amygdala in rats

Fig. 6

Mean arterial pressure measured by telemetry in the home cage increased after bilaterally amygdala lesions. a Histological identification of a lesion of the amygdala pressor region (CeA). Black rectangle indicates the lesioned area (Inset: higher magnification). Scale bar 1 mm. b Average MAP measured by telemetry over 24 h from five rats in the home cage before (black line and gray shadow) and after (white line and black shadow) amygdala lesions. Lines and shadows indicate mean ± SEM. Black thick bar and background gray shadows between 6 to 18 h indicate the dark-time period in the 12–12 h light–dark cycle. c Amygdala lesions increased baseline arterial blood pressure from 95.3 ± 1.6 to 100.7 ± 1.9 mmHg in the light cycle and from 100.5 ± 2.1 to 106.6 ± 2.7 mmHg in the dark cycle. Both light–dark cycle (*p < 0.05, light or dark) and amygdala lesion (*p < 0.05, pre-lesion or post-lesion) had statistically significant main effects without interaction (two-way ANOVA). Thick and thin lines indicate average and individual data recorded from each rat, respectively

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