Author: Randolf Menzel
Publisher: Academic Press
ISBN: 012398260X
Category : Psychology
Languages : en
Pages : 600
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Book Description
Understanding how memories are induced and maintained is one of the major outstanding questions in modern neuroscience. This is difficult to address in the mammalian brain due to its enormous complexity, and invertebrates offer major advantages for learning and memory studies because of their relative simplicity. Many important discoveries made in invertebrates have been found to be generally applicable to higher organisms, and the overarching theme of the proposed will be to integrate information from different levels of neural organization to help generate a complete account of learning and memory. Edited by two leaders in the field, Invertebrate Learning and Memory will offer a current and comprehensive review, with chapters authored by experts in each topic. The volume will take a multidisciplinary approach, exploring behavioral, cellular, genetic, molecular, and computational investigations of memory. Coverage will include comparative cognition at the behavioral and mechanistic level, developments in concepts and methodologies that will underlie future advancements, and mechanistic examples from the most important vertebrate systems (nematodes, molluscs, and insects). Neuroscience researchers and graduate students with an interest in the neural control of cognitive behavior will benefit, as will as will those in the field of invertebrate learning. Presents an overview of invertebrate studies at the molecular / cellular / neural levels and correlates findings to mammalian behavioral investigations Linking multidisciplinary approaches allows for full understanding of how molecular changes in neurons and circuits underpin behavioral plasticity Edited work with chapters authored by leaders in the field around the globe – the broadest, most expert coverage available Comprehensive coverage synthesizes widely dispersed research, serving as one-stop shopping for comparative learning and memory researchers
Author: Martin Giurfa
Publisher: Frontiers Open Access E-books
ISBN: 2889190005
Category :
Languages : en
Pages : 149
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Book Description
Author: Martin Giurfa
Publisher: Elsevier Inc. Chapters
ISBN: 0128071516
Category : Medical
Languages : en
Pages : 600
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Book Description
The behavior of insects transcends elementary forms of adaptive responding to environmental changes. We discuss examples of exploration, instrumental and observational learning, expectation, learning in a social context, and planning of future actions. We show that learning about sensory cues allows insects to transfer flexibly their responses to novel stimuli attaining thereby different levels of complexity, from basic generalization to categorization and concept learning consistent with rule extraction. We argue that updating of existing memories requires multiple forms of memory processing. A key element in these processes is working memory, an active form of memory considered to allow evaluation of actions on the basis of expected outcome. We discuss which of these cognitive faculties can be traced to specific neural processes and how they relate to the overall organization of the insect brain.
Author: Randolf Menzel
Publisher: Elsevier Inc. Chapters
ISBN: 0128071494
Category : Medical
Languages : en
Pages : 600
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Book Description
In 1984, Hawkins and Kandel published a seminal paper titled “Is There a Cell-Biological Alphabet for Simple Forms of Learning?” Based on their early findings of the cooperative regulation of adenylyl cyclase in sensory neurons of Aplysia, an overarching concept was presented which opened our mind to molecular mechanisms of experience-dependent neural plasticity. Several basic forms of nonassociative and associative learning (habituation, sensitization, and classical conditioning) were explained on the level of rather simple molecular reaction cascades in specific neurons. At that time, these were radical ideas, and even today we struggle with the question whether cognitive faculties such as learning and memory formation can be reduced to ubiquitous cellular functions, and what such a reduction might mean. The concepts presented in this paper were also radical in the sense that they broke with the speculation that the information of acquired memories is stored in molecules like RNA. Meanwhile, it is well accepted in neuroscience that neural circuits acquire new information by changing network properties on the level of specified neurons and their synaptic connections. Multiple key elements contribute to these adaptations, and it is the task of today’s neuroscience to unravel the complex hierarchies of interactions from the molecular to the systems level in solving the problem of predicting future behavior from experience in the past.
Author: Randolf Menzel
Publisher: Elsevier Inc. Chapters
ISBN: 012807177X
Category : Medical
Languages : en
Pages : 600
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Book Description
What is the engram, the memory trace that stores the content of memory? Here, I argue that the engram is more than just the sum of all learning-related neural changes. Rather, it is an integrated part of the whole nervous system, from sensory integration to interneuron processing and motor control. Emphasis is given to those neural processing components that do not express themselves in the behavior of the animal. To date, the search for the olfactory engram in the bee brain has focused on network properties in the antennal lobe (AL), the input and output regions of the mushroom body region (calyx), the mushroom body extrinsic neurons, and the reward pathway. I conclude that the olfactory memory trace in the AL relates predominantly to attention-generating properties. The memory trace in the calyx is characterized by the high-order combinatorial integration of multiple sensory inputs. Mushroom body extrinsic neurons are tentatively related to multiple processing categories that represent the acquired values (e.g., favorable conditions and to be avoided condition) and provide neural commands for goal-directed behavior and decision making. The system of VUM neurons stores appetitive memory related to appetitive internal states and controls nonassociative and associative memories. A model is presented that aims to capture the multifaceted and distributed nature of the engram and may help to guide our future search of the engram at a systems level.
Author: David L. Glanzman
Publisher: Elsevier Inc. Chapters
ISBN: 0128071656
Category : Medical
Languages : en
Pages : 600
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Book Description
The marine snail Aplysia californica exhibits a simple defensive withdrawal reflex that can undergo several forms of learning. In particular, the reflex can exhibit long-term sensitization (LTS), a form of nonassociative memory. LTS is mediated by long-term facilitation (LTF) of the monosynaptic connection between the sensory and motor neurons that mediate the withdrawal reflex. LTS and LTF represent one of the best understood model systems of long-term memory extent. Furthermore, discoveries from work on this system have provided fundamental insights into the cellular and molecular mechanisms that mediate the induction and maintenance of long-term memory. This chapter reviews this work; it concludes with a discussion of recent studies of the role of protein kinase M in the persistence of the long-term memory and of memory reconsolidation in Aplysia. It is suggested that the study of LTS and LTF can provide important mechanistic information on these two intriguing memory phenomena.
Author: Nigel R. Franks
Publisher: Elsevier Inc. Chapters
ISBN: 0128071885
Category : Medical
Languages : en
Pages : 600
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Book Description
We consider issues of social learning in insect societies. Specifically, we review two controversial cases: (1) teaching during tandem running in the rock ant Temnothorax albipennis and (2) colony-level learning during repeated emigrations in the same species. We have selected these examples for several reasons. First, we wish to highlight the value of using insects as model systems for studying social learning in general. Second, these cases serve as an antidote to the notion that social learning requires theories of mind. Third, social insects provide ideal experimental systems for the rigorous examination of the causes and consequences of social learning. We believe our findings and conclusions are important to those interested in social learning in humans, other vertebrates, and invertebrates because they may suggest that in these systems too social learning can occur in the absence of theories of mind.
Author: M. Heisenberg
Publisher: Elsevier Inc. Chapters
ISBN: 0128071508
Category : Medical
Languages : en
Pages : 600
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Book Description
Animals owe much of their fitness to their behavior. They often have a large behavioral repertoire that they have to manage. For this, they need their brain. Using Drosophila as the study case, this chapter depicts animals as autonomous agents and the brain as a behavioral organizer. Behavior is active. It is generated for its consequences. It serves to change or restore the animal’s condition, with no guarantee for improvement. There are two kinds of activity—reactivity and initiating activity. If in a special situation, the animal’s repertoire contains a behavior with sufficiently positive inferred outcome and this is activated, it is called a reaction. Most situations, however, provide no special cues for which reactions would be available. Animals do not have to wait. They can activate behaviors ‘by themselves,’ in search of one with positive outcome.
Author: Douglas A. Baxter
Publisher: Elsevier Inc. Chapters
ISBN: 0128071559
Category : Medical
Languages : en
Pages : 600
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Book Description
Mathematical models and computer simulations play important roles in developing a better understanding of learning and memory mechanisms. Models provide a means for representing, integrating, and manipulating diverse and complex empirical data. This chapter provides an overview of computational studies of learning and memory in invertebrates, including gene regulatory networks, signal transduction cascades, single neurons, and neural networks. These computational studies are helping to link specific component processes (e.g., changes in protein levels and phosphorylation, modulation of membrane conductances, synaptic plasticity, and network architecture) to features of nonassociative and associative learning. Moreover, these computational studies highlight mechanistic features that are common among different animals and common to multiple forms of learning and memory. Thus, computational analyses provide insights into the relationships among simple and complex forms of learning.
Author: Ludovic Dickel
Publisher: Elsevier Inc. Chapters
ISBN: 0128071737
Category : Medical
Languages : en
Pages : 600
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Book Description
This chapter summarizes the literature on the anatomical and functional organization of the cuttlefish brain, with a focus on the structures involved in learning and memory processes (namely the vertical lobe system and optic lobes). Also, different learning paradigms that are commonly used in Sepia officinalis are described with, when possible, their neural correlates. Recent work on the early development of brain and memory is also reviewed. Some research directions to follow in the field of neurobiology of learning and memory in cuttlefish are suggested to better understand the extraordinary behavioral plasticity of these sophisticated invertebrates.
