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  1. Article ; Online: Temporal foundations of episodic memory.

    Crystal, Jonathon D

    Learning & behavior

    2023  Volume 52, Issue 1, Page(s) 35–50

    Abstract: A fundamental question in the development of animal models of episodic memory concerns the role of temporal processes in episodic memory. Gallistel, (1990) developed a framework in which animals remember specific features about an event, including the ... ...

    Abstract A fundamental question in the development of animal models of episodic memory concerns the role of temporal processes in episodic memory. Gallistel, (1990) developed a framework in which animals remember specific features about an event, including the time of occurrence of the event and its location in space. Gallistel proposed that timing is based on a series of biological oscillators, spanning a wide range of periods. Accordingly, a snapshot of the phases of multiple oscillators provides a representation of the time of occurrence of the event. I review research on basic timing mechanisms that may support memory for times of occurrence. These studies suggest that animals use biological oscillators to represent time. Next, I describe recently developed animal models of episodic memory that highlight the importance of temporal representations in memory. One line of research suggests that an oscillator representation of time supports episodic memory. A second line of research highlights the flow of events in time in episodic memory. Investigations that integrate time and memory may advance the development of animal models of episodic memory.
    MeSH term(s) Animals ; Memory, Episodic ; Mental Recall
    Language English
    Publishing date 2023-11-06
    Publishing country United States
    Document type Review ; Journal Article
    ZDB-ID 2048665-0
    ISSN 1543-4508 ; 1543-4494
    ISSN (online) 1543-4508
    ISSN 1543-4494
    DOI 10.3758/s13420-023-00608-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Memory: Dolphins remember incidental events.

    Crystal, Jonathon D

    Current biology : CB

    2022  Volume 32, Issue 17, Page(s) R929–R931

    Abstract: A fundamental problem in the evolution of cognition is the search for complex memory systems given the longstanding belief that complex cognition is unique to humans. Along these lines, new research suggests that bottlenose dolphins can answer unexpected ...

    Abstract A fundamental problem in the evolution of cognition is the search for complex memory systems given the longstanding belief that complex cognition is unique to humans. Along these lines, new research suggests that bottlenose dolphins can answer unexpected questions after encoding information that was seemingly unimportant when it was encountered.
    MeSH term(s) Animals ; Bottle-Nosed Dolphin ; Cognition ; Humans ; Mental Recall
    Language English
    Publishing date 2022-09-07
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2022.08.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Comparative cognition: Perspectives, challenges, and prospects.

    Crystal, Jonathon D

    Journal of comparative psychology (Washington, D.C. : 1983)

    2021  Volume 135, Issue 1, Page(s) 21–24

    Abstract: The publication of the centennial year of ... ...

    Abstract The publication of the centennial year of the
    MeSH term(s) Animals ; Cognition ; Psychology, Comparative
    Language English
    Publishing date 2021-02-08
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 3130-6
    ISSN 1939-2087 ; 0735-7036 ; 0093-4127
    ISSN (online) 1939-2087
    ISSN 0735-7036 ; 0093-4127
    DOI 10.1037/com0000271
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Evaluating evidence from animal models of episodic memory.

    Crystal, Jonathon D

    Journal of experimental psychology. Animal learning and cognition

    2021  Volume 47, Issue 3, Page(s) 337–356

    Abstract: ... in animals (c) what standards ought to be applied to a candidate model of episodic memory in nonhumans (d ... binding of episodic memories (d) memory of multiple Items in context using episodic memory (e) replay ...

    Abstract A fundamental question in comparative cognition concerns the ability to remember back in time to an earlier event or episode. This ability is referred to as episodic memory. Whether nonhumans can be used to model human episodic memory has engendered much interest and debate for over 2 decades. The central hypothesis of an animal model of episodic memory is that, at the moment of the memory assessment, the animal remembers back in time to a specific earlier event or episode. I describe (a) an approach for evaluating evidence of episodic memory in animal models (b) what aspects of episodic memory are being modeled in animals (c) what standards ought to be applied to a candidate model of episodic memory in nonhumans (d) the first evidence of episodic memory in nonhumans, and (e) a brief overview of the diversity of approaches that are now available. The remainder of the article focuses on the development of a robust model of episodic memory in rats. Converging lines of evidence suggest that rats provide a good model for exploring episodic memory. This evidence includes studies that focus on (a) what-where-when memory (b) source memory (c) binding of episodic memories (d) memory of multiple Items in context using episodic memory (e) replay of episodic memories (f), recollection, and (g) answering an unexpected question after incidental encoding. In each of these domains, I describe evidence for episodic memory in the absence of nonepisodic judgments of familiarity. I end with some consideration of future directions. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
    MeSH term(s) Animals ; Cognition ; Memory, Episodic ; Mental Recall ; Models, Animal ; Rats ; Recognition, Psychology
    Language English
    Publishing date 2021-10-07
    Publishing country United States
    Document type Journal Article
    ISSN 2329-8464
    ISSN (online) 2329-8464
    DOI 10.1037/xan0000294
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Memory: Amyloid Beta Is Good Before It Is Bad.

    Crystal, Jonathon D

    Current biology : CB

    2020  Volume 30, Issue 10, Page(s) R449–R450

    Abstract: A fundamental mystery in the biology of memory is to understand the pathway from normal memory to later dysfunctional memory. Some insight on this problem comes from new research suggesting that amyloid beta helps memory consolidation, before it impairs ... ...

    Abstract A fundamental mystery in the biology of memory is to understand the pathway from normal memory to later dysfunctional memory. Some insight on this problem comes from new research suggesting that amyloid beta helps memory consolidation, before it impairs memory.
    MeSH term(s) Amyloid beta-Peptides/metabolism ; Biological Transport ; Memory ; Memory Consolidation
    Chemical Substances Amyloid beta-Peptides
    Language English
    Publishing date 2020-05-18
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2020.03.024
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Comparative Cognition: Rats Pay Back Quid Pro Quo.

    Crystal, Jonathon D

    Current biology : CB

    2018  Volume 28, Issue 4, Page(s) R153–R155

    Abstract: Humans engage in exchanges of commodities or services, often paying back a commodity with a different service. New research suggests that rats can reciprocally trade food for allogrooming, and vice versa. ...

    Abstract Humans engage in exchanges of commodities or services, often paying back a commodity with a different service. New research suggests that rats can reciprocally trade food for allogrooming, and vice versa.
    MeSH term(s) Animals ; Cognition ; Humans ; Rats
    Language English
    Publishing date 2018-03-25
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2018.01.030
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Neuroscience: Memory Encoding in the Absence of Cell Firing.

    Crystal, Jonathon D

    Current biology : CB

    2018  Volume 28, Issue 21, Page(s) R1248–R1249

    Abstract: New research suggests that rats can learn new spatial information in the absence of cell firing. A small enhancement of GABAergic inhibition with a low dose of muscimol blocked cell firing but left long-term potentiation induction intact, while ... ...

    Abstract New research suggests that rats can learn new spatial information in the absence of cell firing. A small enhancement of GABAergic inhibition with a low dose of muscimol blocked cell firing but left long-term potentiation induction intact, while behaviorally it blocked memory retrieval but left memory encoding intact.
    MeSH term(s) Animals ; Learning ; Long-Term Potentiation ; Memory ; Muscimol ; Neurosciences ; Rats
    Chemical Substances Muscimol (2763-96-4)
    Language English
    Publishing date 2018-11-05
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2018.08.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Negative allosteric modulation of CB1 cannabinoid receptor signaling decreases intravenous morphine self-administration and relapse in mice.

    Oliva, Idaira / Kazi, Fezaan / Cantwell, Lucas N / Thakur, Ganesh A / Crystal, Jonathon D / Hohmann, Andrea G

    bioRxiv : the preprint server for biology

    2024  

    Abstract: The endocannabinoid system interacts with the reward system to modulate responsiveness to natural reinforcers, as well as drugs of abuse. Previous preclinical studies suggested that direct blockade of CB1 cannabinoid receptors (CB1R) could be leveraged ... ...

    Abstract The endocannabinoid system interacts with the reward system to modulate responsiveness to natural reinforcers, as well as drugs of abuse. Previous preclinical studies suggested that direct blockade of CB1 cannabinoid receptors (CB1R) could be leveraged as a potential pharmacological approach to treat substance use disorder, but this strategy failed during clinical trials due to severe psychiatric side effects. Alternative strategies have emerged to circumvent the side effects of direct CB1 binding through the development of allosteric modulators. We hypothesized that pharmacological inhibition of CB1R signaling through negative allosteric modulation (NAM) would reduce the reinforcing properties of morphine and decrease opioid addictive behaviors. By employing i.v. self-administration in mice, we studied the effects of the CB1-biased NAM GAT358 on morphine intake, relapse-like behavior, and motivation to work for morphine infusions. Our data revealed that GAT358 reduced morphine infusion intake during the maintenance phase of morphine self-administration under fixed ratio 1 schedule of reinforcement. GAT358 decreased morphine-seeking behavior after forced abstinence. Moreover, GAT358 dose-dependently decreased the motivation to obtain morphine infusions in a progressive ratio schedule of reinforcement. Strikingly, GAT358 did not affect the motivation to work for food rewards in an identical progressive ratio task, suggesting that the effect of GAT358 in decreasing opioid self-administration is reward specific. Furthermore, GAT58 did not produce motor ataxia in the rota-rod test. Our results suggest that CB1R NAMs reduced the reinforcing properties of morphine and could represent a viable therapeutic route to safely decrease opioid-addicted behaviors.
    Language English
    Publishing date 2024-01-19
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.01.16.575900
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Editorial.

    Crystal, Jonathon D

    Learning & behavior

    2016  Volume 44, Issue 1, Page(s) 1

    MeSH term(s) Behavior ; Learning ; Periodicals as Topic/trends
    Language English
    Publishing date 2016-03
    Publishing country United States
    Document type Editorial
    ZDB-ID 2048665-0
    ISSN 1543-4508 ; 1543-4494
    ISSN (online) 1543-4508
    ISSN 1543-4494
    DOI 10.3758/s13420-016-0216-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Comparative approaches to metacognition

    Jonathon D. Crystal

    Animal Behavior and Cognition, Vol 6, Iss 4, Pp 254-

    Prospects, problems, and the future

    2019  Volume 261

    Abstract: This article describes the author’s perspective on research in comparative approaches to metacognition. A brief review highlights the research that has informed this perspective. The prospects for making progress in comparative metacognition are outlined. ...

    Abstract This article describes the author’s perspective on research in comparative approaches to metacognition. A brief review highlights the research that has informed this perspective. The prospects for making progress in comparative metacognition are outlined. Next, the article describes problems that any research program on comparative metacognition needs to address. Some recommendations for future research are offered.
    Keywords metacognition ; comparative metacognition ; uncertainty monitoring ; metamemory ; quantitative modeling ; Zoology ; QL1-991
    Language English
    Publishing date 2019-11-01T00:00:00Z
    Publisher Animal Behavior and Cognition
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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