Aversive conditioning in the tardigrade, Dactylobiotus dispar

Journal of Experimental Psychology. Animal Learning and Cognition
Sarah ZhouTheodore C Dumas

Abstract

Defensive responses to threatening events in the environment are displayed by a vast number of animals, both vertebrate and invertebrate. These defensive responses can be associated with salient neutral stimuli that are present along with the threatening stimulus. This is referred to as aversive conditioning. Animals with more simple nervous systems, such as Aplysia, C elegans, and Drosophila, have facilitated identification of some the physiological processes that support aversive conditioning. Perhaps even more basic information regarding the neurobiology of learning and memory may be gleaned from animals that have special characteristics not found in other species. Tardigrades, also known as "water bears," are microscopic eight-legged animals that live in various aquatic and terrestrial environments. They are known for their resilience to extreme conditions because of their ability to enter a cryptobiotic "tun" state during which they turn off their metabolism. Thus, tardigrades present an ideal model to study the metabolic requirements for memory storage. However, there is no prior research on tardigrade learning and memory. The purpose of this study was to demonstrate aversive conditioning in a tardigrade species, Dactylob...Continue Reading

Citations

Mar 30, 2021·Neuroscience Bulletin·Mohamed Adel, Leslie C Griffith
Jan 14, 2021·Learning & Behavior·Ken Cheng

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