Critical review and theoritical paper
Hippocampal and septal injections of nicotine and 8-OH-DPAT distinguish among different animal tests of anxiety

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Abstract

  • 1.

    1. Different animal tests model different anxiety disorders. Thus, the social interaction test is a model of generalised anxiety disorder, plus-maze Trial 1 models elements of panic disorder and Trial 2 in the elevated plus-maze is a model of specific phobia.

  • 2.

    2. Studies of the neuroanatomical and neurochemical pathways controlling behaviour in these different tests provides information on the neurobiological mechanisms modulating anxiety disorders.

  • 3.

    3. In the social interaction test, nicotine and 8-OH-DPAT had anxiogenic effects when injected into the dorsal hippocampus or the lateral septum.

  • 4.

    4. These ligands were without effect on Trial 1 in the plus-maze when injected into the dorsal hippocampus, but had anxiogenic effects when injected into the lateral septum.

  • 5.

    5. On Trial 2 in the elevated plus-maze, nicotine had an anxiolytic effect, but 8-OH-DPAT had an aaxiogenic effect when injected into the dorsal hippocampus.

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