Invertebrate Learning and Memory
Chapter 26. A Multidisciplinary Approach to Learning and Memory in the Crab Neohelice (Chasmagnathus) granulata
Description:... Due to their unique advantages for certain experimental approaches, crustaceans have long been used in neurobiological research. In this chapter, we describe a number of important contributions to the field of learning and memory yielded by investigations carried out over more than 20 years in the crab Neohelice (until recently Chasmagnathus) granulata. Several distinct learning paradigms have been implemented in this animal, with the most compelling studies being performed in the so called context-signal memory (CSM). Acquired through a single training session, CSM entails a long-lasting modification (>5 days) of the escape response to a visual danger stimulus. CSM is determined by an association between two independent memories—a memory of the stimulus (signal memory) and a memory of the training environment (context memory). Investigations of CSM have been performed using behavioral, ecological, electrophysiological, anatomical, pharmacological, and molecular approaches. Fundamental findings and their significance are discussed.
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