Studying emotion in invertebrates: what has been done, what can be measured and what they can provide

The Journal of Experimental Biology
Clint J Perry, Luigi Baciadonna

Abstract

Until recently, whether invertebrates might exhibit emotions was unknown. This possibility has traditionally been dismissed by many as emotions are frequently defined with reference to human subjective experience, and invertebrates are often not considered to have the neural requirements for such sophisticated abilities. However, emotions are understood in humans and other vertebrates to be multifaceted brain states, comprising dissociable subjective, cognitive, behavioural and physiological components. In addition, accumulating literature is providing evidence of the impressive cognitive capacities and behavioural flexibility of invertebrates. Alongside these, within the past few years, a number of studies have adapted methods for assessing emotions in humans and other animals, to invertebrates, with intriguing results. Sea slugs, bees, crayfish, snails, crabs, flies and ants have all been shown to display various cognitive, behavioural and/or physiological phenomena that indicate internal states reminiscent of what we consider to be emotions. Given the limited neural architecture of many invertebrates, and the powerful tools available within invertebrate research, these results provide new opportunities for unveiling the neur...Continue Reading

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Citations

May 22, 2019·Proceedings of the National Academy of Sciences of the United States of America·Jessie E C AdriaenseThomas Bugnyar
Sep 28, 2018·Frontiers in Veterinary Science·Luigi BaciadonnaChristian Nawroth
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Jan 21, 2022·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Megan M Jorgensen, Brian D Burrell

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