Learning & memory最新文献_第6页

Insights from the past: the work of Hans von Alten on the evolution of brain structure, ecological adaptation, and cognition in hymenopteran species. 过去的启示：汉斯-冯-阿尔滕关于膜翅目物种大脑结构、生态适应和认知进化的研究。

IF 1.8 4区医学

Learning & memory Pub Date : 2024-06-11 Print Date: 2024-05-01 DOI: 10.1101/lm.053922.124

Randolf Menzel, Jürgen Rybak

引用次数: 0

The caloric value of food intake structurally adjusts a neuronal mushroom body circuit mediating olfactory learning in Drosophila. 食物摄入的热量价值从结构上调整了果蝇中介导嗅觉学习的神经元蘑菇体回路。

IF 1.8 4区医学

Learning & memory Pub Date : 2024-06-11 Print Date: 2024-05-01 DOI: 10.1101/lm.053997.124

Büşra Çoban, Haiko Poppinga, El Yazid Rachad, Bart Geurten, David Vasmer, Francisco Jesus Rodriguez Jimenez, Yogesh Gadgil, Stephan Hubertus Deimel, Idan Alyagor, Oren Schuldiner, Ilona C Grunwald Kadow, Thomas Dieter Riemensperger, Annekathrin Widmann, André Fiala

{"title":"The caloric value of food intake structurally adjusts a neuronal mushroom body circuit mediating olfactory learning in Drosophila.","authors":"Büşra Çoban, Haiko Poppinga, El Yazid Rachad, Bart Geurten, David Vasmer, Francisco Jesus Rodriguez Jimenez, Yogesh Gadgil, Stephan Hubertus Deimel, Idan Alyagor, Oren Schuldiner, Ilona C Grunwald Kadow, Thomas Dieter Riemensperger, Annekathrin Widmann, André Fiala","doi":"10.1101/lm.053997.124","DOIUrl":"10.1101/lm.053997.124","url":null,"abstract":"Associative learning enables the adaptive adjustment of behavioral decisions based on acquired, predicted outcomes. The valence of what is learned is influenced not only by the learned stimuli and their temporal relations, but also by prior experiences and internal states. In this study, we used the fruit fly Drosophila melanogaster to demonstrate that neuronal circuits involved in associative olfactory learning undergo restructuring during extended periods of low-caloric food intake. Specifically, we observed a decrease in the connections between specific dopaminergic neurons (DANs) and Kenyon cells at distinct compartments of the mushroom body. This structural synaptic plasticity was contingent upon the presence of allatostatin A receptors in specific DANs and could be mimicked optogenetically by expressing a light-activated adenylate cyclase in exactly these DANs. Importantly, we found that this rearrangement in synaptic connections influenced aversive, punishment-induced olfactory learning but did not impact appetitive, reward-based learning. Whether induced by prolonged low-caloric conditions or optogenetic manipulation of cAMP levels, this synaptic rearrangement resulted in a reduction of aversive associative learning. Consequently, the balance between positive and negative reinforcing signals shifted, diminishing the ability to learn to avoid odor cues signaling negative outcomes. These results exemplify how a neuronal circuit required for learning and memory undergoes structural plasticity dependent on prior experiences of the nutritional value of food.","PeriodicalId":18003,"journal":{"name":"Learning & memory","volume":"31 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11199950/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141306209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Roles of feedback and feed-forward networks of dopamine subsystems: insights from Drosophila studies. 多巴胺子系统反馈和前馈网络的作用：果蝇研究的启示。

IF 1.8 4区医学

Learning & memory Pub Date : 2024-06-11 Print Date: 2024-05-01 DOI: 10.1101/lm.053807.123

Andrew M Davidson, Toshihide Hige

{"title":"Roles of feedback and feed-forward networks of dopamine subsystems: insights from Drosophila studies.","authors":"Andrew M Davidson, Toshihide Hige","doi":"10.1101/lm.053807.123","DOIUrl":"10.1101/lm.053807.123","url":null,"abstract":"Across animal species, dopamine-operated memory systems comprise anatomically segregated, functionally diverse subsystems. Although individual subsystems could operate independently to support distinct types of memory, the logical interplay between subsystems is expected to enable more complex memory processing by allowing existing memory to influence future learning. Recent comprehensive ultrastructural analysis of the Drosophila mushroom body revealed intricate networks interconnecting the dopamine subsystems-the mushroom body compartments. Here, we review the functions of some of these connections that are beginning to be understood. Memory consolidation is mediated by two different forms of network: A recurrent feedback loop within a compartment maintains sustained dopamine activity required for consolidation, whereas feed-forward connections across compartments allow short-term memory formation in one compartment to open the gate for long-term memory formation in another compartment. Extinction and reversal of aversive memory rely on a similar feed-forward circuit motif that signals omission of punishment as a reward, which triggers plasticity that counteracts the original aversive memory trace. Finally, indirect feed-forward connections from a long-term memory compartment to short-term memory compartments mediate higher-order conditioning. Collectively, these emerging studies indicate that feedback control and hierarchical connectivity allow the dopamine subsystems to work cooperatively to support diverse and complex forms of learning.","PeriodicalId":18003,"journal":{"name":"Learning & memory","volume":"31 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11199952/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141306207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Phylogeny of the Hymenopteran Brain. 膜翅目动物大脑的系统发育。

IF 1.8 4区医学

Learning & memory Pub Date : 2024-06-11 Print Date: 2024-05-01 DOI: 10.1101/lm.053894.123

Hans V Alten

引用次数: 0

How emotional contexts modulate item memory in individuals with high and low negative affect and worry. 情绪情境如何调节高负面情绪和低负面情绪及担忧情绪个体的项目记忆。

IF 1.8 4区医学

Learning & memory Pub Date : 2024-05-13 Print Date: 2024-04-01 DOI: 10.1101/lm.053891.123

Nina Becker, Simone Kühn, Andreas Olsson

{"title":"How emotional contexts modulate item memory in individuals with high and low negative affect and worry.","authors":"Nina Becker, Simone Kühn, Andreas Olsson","doi":"10.1101/lm.053891.123","DOIUrl":"10.1101/lm.053891.123","url":null,"abstract":"Emotional stimuli are usually remembered with high confidence. Yet, it remains unknown whether-in addition to memory for the emotional stimulus itself-memory for a neutral stimulus encountered just after an emotional one can be enhanced. Further, little is known about the interplay between emotion elicited by a stimulus and emotion relating to affective dispositions. To address these questions, we examined (1) how emotional valence and arousal of a context image preceding a neutral item image affect memory of the item, and (2) how such memory modulation is affected by two hallmark features of emotional disorders: trait negative affect and tendency to worry. In two experiments, participants encoded a series of trials in which an emotional (negative, neutral, or positive) context image was followed by a neutral item image. In experiment 1 (n = 42), items presented seconds after negative context images were remembered better and with greater confidence compared to those presented after neutral and positive ones. Arousal ratings of negative context images were higher compared to neutral and positive ones and the likelihood of correctly recognizing an item image was related to higher arousal of the context image. In experiment 2 (n = 59), better item memory was related to lower trait negative affect. Participants with lower trait negative affect or tendency to worry displayed higher confidence compared to those with high negative affect or tendency to worry. Our findings describe an emotional \"carry-over\" effect elicited by a context image that enhances subsequent item memory on a trial-by-trial basis, however, not in individuals with high trait negative affect who seem to have a general memory disadvantage.","PeriodicalId":18003,"journal":{"name":"Learning & memory","volume":"31 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11098457/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140916656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of extinction timing on pre-extinction arousal and subsequent return of fear 灭绝时间对灭绝前唤醒和随后恐惧恢复的影响

IF 2 4区医学

Learning & memory Pub Date : 2024-04-01 DOI: 10.1101/lm.053902.123

Miriam Kampa, Rudolf Stark, Tim Klucken

{"title":"The impact of extinction timing on pre-extinction arousal and subsequent return of fear","authors":"Miriam Kampa, Rudolf Stark, Tim Klucken","doi":"10.1101/lm.053902.123","DOIUrl":"https://doi.org/10.1101/lm.053902.123","url":null,"abstract":"Exposure-based therapy is effective in treating anxiety, but a return of fear in the form of relapse is common. Exposure is based on the extinction of Pavlovian fear conditioning. Both animal and human studies point to increased arousal during immediate compared to delayed extinction (>+24 h), which presumably impairs extinction learning and increases the subsequent return of fear. Impaired extinction learning under arousal might interfere with psychotherapeutic interventions. The aim of the present study was to investigate whether arousal before extinction differs between extinction groups and whether arousal before extinction predicts the return of fear in a later (retention) test. As a highlight, both the time between fear acquisition and extinction (immediate vs. delayed) and the time between extinction and test (early vs. late test) were systematically varied. We performed follow-up analyses on data from 103 young, healthy participants to test the above hypotheses. Subjective arousal ratings and physiological arousal measures of sympathetic and hypothalamic pituitary adrenal axis activation (tonic skin conductance and salivary cortisol) were collected. Increased pre-extinction arousal in the immediate extinction group was only confirmed for subjective arousal. In linear regression analyses, none of the arousal measures predicted a significant return of fear in the different experimental groups. Only when we aggregated across the two test groups, tonic skin conductance at the onset of extinction predicted the return of fear in skin conductance responses. The overall results provide little evidence that pre-extinction arousal affects subsequent extinction learning and memory. In terms of clinical relevance, there is no clear evidence that exposure could be improved by reducing subjective or physiological arousal.","PeriodicalId":18003,"journal":{"name":"Learning & memory","volume":"74 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140613208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remembering what we imagine: the role of event schemas in shaping how imagined autobiographical events are recalled 记住我们的想象：事件图式在塑造如何回忆想象的自传体事件中的作用

IF 2 4区医学

Learning & memory Pub Date : 2024-04-01 DOI: 10.1101/lm.053993.124

Can Fenerci, Bianca Adjei, Signy Sheldon

{"title":"Remembering what we imagine: the role of event schemas in shaping how imagined autobiographical events are recalled","authors":"Can Fenerci, Bianca Adjei, Signy Sheldon","doi":"10.1101/lm.053993.124","DOIUrl":"https://doi.org/10.1101/lm.053993.124","url":null,"abstract":"Much like recalling autobiographical memories, constructing imagined autobiographical events depends on episodic memory processes. The ability to imagine events contributes to several future-oriented behaviors (e.g., decision-making, problem solving), which relies, in part, on the ability to remember the imagined events. A factor affecting the memorability of such events is their adherence to event schemas—conceptualizations of how events generally unfold. In the current study, we examined how two aspects of event schemas—event expectancy and familiarity—affect the ability to recall imagined events. Participants first imagined and described in detail autobiographical events that either aligned with or deviated from an event, expected to occur in a context (e.g., a kitchen) that was either familiar or unfamiliar. This resulted in imaginations ranging from maximally schema-congruent (expected events in a familiar context) to maximally novel (unexpected events in an unfamiliar context). Twenty-four hours later, participants recalled these imagined events. Recollections were scored for the number of reinstated details from the imaginations and the number of newly added details. We found greater reinstatement of details for both the maximally congruent and maximally novel events, while maximally novel events were recalled more precisely than other events (i.e., fewer added details). Our results indicate a complementary benefit to remembering schematic and novel imagined events, which may guide equally important but distinct future-oriented behaviors.","PeriodicalId":18003,"journal":{"name":"Learning & memory","volume":"26 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140827492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adolescents flexibly adapt action selection based on controllability inferences. 青少年根据可控性推断灵活调整行动选择。

IF 1.8 4区医学

Learning & memory Pub Date : 2024-03-25 Print Date: 2024-03-01 DOI: 10.1101/lm.053901.123

Hillary A Raab, Noam Goldway, Careen Foord, Catherine A Hartley

{"title":"Adolescents flexibly adapt action selection based on controllability inferences.","authors":"Hillary A Raab, Noam Goldway, Careen Foord, Catherine A Hartley","doi":"10.1101/lm.053901.123","DOIUrl":"10.1101/lm.053901.123","url":null,"abstract":"From early in life, we encounter both controllable environments, in which our actions can causally influence the reward outcomes we experience, and uncontrollable environments, in which they cannot. Environmental controllability is theoretically proposed to organize our behavior. In controllable contexts, we can learn to proactively select instrumental actions that bring about desired outcomes. In uncontrollable environments, Pavlovian learning enables hard-wired, reflexive reactions to anticipated, motivationally salient events, providing \"default\" behavioral responses. Previous studies characterizing the balance between Pavlovian and instrumental learning systems across development have yielded divergent findings, with some studies observing heightened expression of Pavlovian learning during adolescence and others observing a reduced influence of Pavlovian learning during this developmental stage. In this study, we aimed to investigate whether a theoretical model of controllability-dependent arbitration between learning systems might explain these seemingly divergent findings in the developmental literature, with the specific hypothesis that adolescents' action selection might be particularly sensitive to environmental controllability. To test this hypothesis, 90 participants, aged 8-27, performed a probabilistic-learning task that enables estimation of Pavlovian influence on instrumental learning, across both controllable and uncontrollable conditions. We fit participants' data with a reinforcement-learning model in which controllability inferences adaptively modulate the dominance of Pavlovian versus instrumental control. Relative to children and adults, adolescents exhibited greater flexibility in calibrating the expression of Pavlovian bias to the degree of environmental controllability. These findings suggest that sensitivity to environmental reward statistics that organize motivated behavior may be heightened during adolescence.","PeriodicalId":18003,"journal":{"name":"Learning & memory","volume":"31 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11000582/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140288469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semantic associations restore neural encoding mechanisms 语义关联恢复神经编码机制

IF 2 4区医学

Learning & memory Pub Date : 2024-03-01 DOI: 10.1101/lm.053996.124

Isabelle L. Moore, Nicole M. Long

{"title":"Semantic associations restore neural encoding mechanisms","authors":"Isabelle L. Moore, Nicole M. Long","doi":"10.1101/lm.053996.124","DOIUrl":"https://doi.org/10.1101/lm.053996.124","url":null,"abstract":"Lapses in attention can negatively impact later memory of an experience. Attention and encoding resources are thought to decline as more experiences are encountered in succession, accounting for the primacy effect in which memory is better for items encountered early compared to late in a study list. However, accessing prior knowledge during study can facilitate subsequent memory, suggesting a potential avenue to counteract this decline. Here, we investigated the extent to which semantic associations—shared meaning between experiences—can counteract declines in encoding resources. Our hypothesis is that semantic associations restore neural encoding mechanisms, which in turn improves memory. We recorded scalp electroencephalography (EEG) while male and female human participants performed a delayed free recall task. Half of the items from late in each study list were semantically associated with an item presented earlier in the list. We find that semantic associations improve memory specifically for late list items and selectively modulate the neural signals engaged during the study of late list items. Relative to other recalled items, late list items that are subsequently semantically clustered—recalled consecutively with their semantic associate—elicit increased high-frequency activity and decreased low-frequency activity, a hallmark of successful encoding. Our findings demonstrate that semantic associations restore neural encoding mechanisms and improve later memory. More broadly, these findings suggest that prior knowledge modulates the orientation of attention to influence encoding mechanisms.","PeriodicalId":18003,"journal":{"name":"Learning & memory","volume":"38 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140171566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monoubiquitination of histone H2B is a crucial regulator of the transcriptome during memory formation 组蛋白 H2B 的单泛素化是记忆形成过程中转录组的关键调节因子

IF 2 4区医学

Learning & memory Pub Date : 2024-03-01 DOI: 10.1101/lm.053912.123

Shaghayegh Navabpour, Kayla Farrell, Shannon E. Kincaid, Nour Omar, Madeline Musaus, Yu Lin, Hehuang Xie, Timothy J. Jarome

引用次数: 0