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Tests of Fear, Novelty, and Tonic Immobility

Tests of Fear, Novelty, and Tonic Immobility. John J McGlone. Fear & Novelty. An Emotion Is focused in the Amygdala Requires memory and limbic system activation. Most Animals. Are neophobic – they fear new aspects of their environment, including foods

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Tests of Fear, Novelty, and Tonic Immobility

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  1. Tests of Fear, Novelty, and Tonic Immobility John J McGlone

  2. Fear & Novelty • An Emotion • Is focused in the Amygdala • Requires memory and limbic system activation

  3. Most Animals • Are neophobic – they fear new aspects of their environment, including foods • After the initial experience with a new setting or a new food, and as long as that food or situation did not make the animal ill, the animal will be less fearful of that situation or food

  4. Limbic – Amygdala -- Caudate

  5. Nuclei within the AmygdalaLess commonly discussed, the VNAg Vomeronasal Amygdala

  6. Limbic -- Hippocampus

  7. Memory & Stress Neocortex (higher centers) Senses Hippocampus(memory) Amygdala(fear) Hypothalamus(integration) Behavioral and/or endocrine responses

  8. Expressions of Fear • Pigs: startle-freeze, move slowly, explore with caution or run • Cattle: use flight zone; few predators • Chickens: run or fly away; tonic immobility

  9. Rat Elevated Plus Maze

  10. Rat Open Field Test

  11. Pig Open Field Test

  12. Open Field Test

  13. Other tests • Back test for pigs • Fear test (human-animal) • Tonic immobility

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