Towards an Emotional Robot: Simulating Hippocampal-Mediated Anxiety
The approach taken here is to attempt to simulate an emotion, anxiety, using a neural network which approximates to real neural systems and a simulated robot (Nomadic Technologies v2.6.7). There are currently many robots being designed whose behaviour depends upon innate responses (reactive robots) or learning but which we believe lack the requirements for emotions. The key aspect of our definition of emotional robotics is that the robot will react differently to the same stimulus depending upon its emotional status. We describe a simulation which provides the basis for such a system. The major part of the simulation is a neural network representation of the mammalian hippocampus. Experiments are presented in which the robot exhibits anxiety-like behaviour, which changes in a biologically realistic manner after a “lesion”.
KeywordsNoradrenaline Neurol Choline Acetylcholine Sonar
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- 2.Gray JA, McNaughton N. The neuropsychology of anxiety: Reprise. In: Hope DA (ed) Perspectives on anxiety, panic and fear. University of Nebraska Press, Lincoln, 1996.Google Scholar
- 3.O’Keefe J, Nadel L. The hippocampus as a cognitive map. Clarendon, Oxford, 1978.Google Scholar
- 7.Honey RC, Watt A, Good M. Hippocampal lesions disrupt an associative mismatch process. J Neurosci 1998; 18:2226–2230.Google Scholar
- 8.Hasselmo ME, Schnell E. Laminar selectivity of the cholinergic suppression of synaptic transmission in rat hippocampal region CA1: Computational modelling and brain slice physiology. J Neurosci 1994; 14:3898–3914.Google Scholar
- 9.Denham MJ, McCabe SL. Biological basis for a neural model of learning and recall of goal-directed sensory-motor behaviours. In: Proc world congress on neural networks, San Diego, 1996, pp 1283–1286. Google Scholar
- 10.Schmajuk NA, Lam Y, Gray JA. Latent inhibition: A neural network approach. J Exp Psych 1996; 22:321–349.Google Scholar
- 12.McGuire TR. Emotion and behaviour genetics in vertebrates and invertebrates. In: Lewis M, Haviland JM (eds) Handbook of Emotions. Guildford Press, New York, 1993, pp 155–166.Google Scholar
- 17.Lee DC The map building and exploration strategies of a simple sonar-equipped mobile robot; an experimental, quantitative evaluation. Distinguished dissertations in computer science. Cambridge University Press, 1996.Google Scholar
- 20.Vanderwolf CH, Kramis R, Robinson TE. Hippocampal electrical activity during waking behaviour and sleep: Analyses using centrally acting drugs. In: Elliott K, Whelan J (eds) Functions of the septo-hippocampal system. Elsevier, Amsterdam, 1978, pp 199–221 (Ciba Foundation symp 58). Google Scholar
- 22.Etienne AS. The control of short-distance homing in the golden hamster. In: Ellen P, Thinus-Blanc C (eds) Cognitive processes in spatial orientation in animal and man. Martinus NijhofF, Dortrecht, 1987, pp 223–251.Google Scholar