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Effect of Sindbis viral vector-mediated overexpression of NPY in the amygdala on anxiety-related behaviour in the open field. (A) Total activity measured as number of lines crossed in the open field. (B) Latency for animals to reach the perimeter of the open field upon introduction into the apparatus. (C) Presence of animals in centre squares of the open field. (D) Presence of animals in the corners of the open field. *P < 0.01 and **P < 0.001.
