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Response sub-additivity and variability quenching in visual cortex 视觉皮层中的反应次累加性和变异性淬火
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-02-19 DOI: 10.1038/s41583-024-00795-0
Robbe L. T. Goris, Ruben Coen-Cagli, Kenneth D. Miller, Nicholas J. Priebe, Máté Lengyel
Sub-additivity and variability are ubiquitous response motifs in the primary visual cortex (V1). Response sub-additivity enables the construction of useful interpretations of the visual environment, whereas response variability indicates the factors that limit the precision with which the brain can do this. There is increasing evidence that experimental manipulations that elicit response sub-additivity often also quench response variability. Here, we provide an overview of these phenomena and suggest that they may have common origins. We discuss empirical findings and recent model-based insights into the functional operations, computational objectives and circuit mechanisms underlying V1 activity. These different modelling approaches all predict that response sub-additivity and variability quenching often co-occur. The phenomenology of these two response motifs, as well as many of the insights obtained about them in V1, generalize to other cortical areas. Thus, the connection between response sub-additivity and variability quenching may be a canonical motif across the cortex. Sub-additive responses to simultaneously presented stimuli and quenching of variability in responses to repeated presentations of a stimulus are characteristics of neurons in the primary visual cortex. In this Perspective, Goris et al. argue that these phenomena often co-occur and may have common mechanistic and computational origins.
次相加性和可变性是初级视觉皮层(V1)中无处不在的反应主题。反应的次相加性有助于构建对视觉环境的有用解释,而反应的可变性则表明了限制大脑精确完成这项工作的因素。越来越多的证据表明,引起反应次相加性的实验操作往往也会抑制反应变异性。在此,我们将概述这些现象,并指出它们可能有共同的起源。我们讨论了实证研究结果以及最近基于模型对 V1 活动的功能操作、计算目标和电路机制的见解。这些不同的建模方法都预测,反应次相加性和变异性淬灭经常会同时出现。这两种反应模式的现象以及在 V1 中获得的有关它们的许多见解可以推广到其他皮层区域。因此,反应亚加性和变异性淬灭之间的联系可能是整个大脑皮层的典型模式。
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引用次数: 0
Author Correction: Curiosity: primate neural circuits for novelty and information seeking 作者更正:好奇心:灵长类动物寻求新奇和信息的神经回路。
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-02-12 DOI: 10.1038/s41583-024-00800-6
Ilya E. Monosov
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引用次数: 0
The human hippocampus beyond episodic memory 人类海马体超越了外显记忆。
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-02-08 DOI: 10.1038/s41583-024-00798-x
Valeria Della-Maggiore
In this Journal Club, Valeria Della-Maggiore highlights a 2017 paper that provided key evidence for a role for the hippocampus in motor skill learning
在本期 "期刊俱乐部 "中,瓦莱里娅-德拉-马焦雷(Valeria Della-Maggiore)重点介绍了 2017 年的一篇论文,该论文提供了海马体在运动技能学习中发挥作用的关键证据
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引用次数: 0
Neural circuits of long-term thermoregulatory adaptations to cold temperatures and metabolic demands 长期体温调节适应低温和新陈代谢需求的神经回路。
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-02-05 DOI: 10.1038/s41583-023-00785-8
Clarissa M. D. Mota, Christopher J. Madden
The mammalian brain controls heat generation and heat loss mechanisms that regulate body temperature and energy metabolism. Thermoeffectors include brown adipose tissue, cutaneous blood flow and skeletal muscle, and metabolic energy sources include white adipose tissue. Neural and metabolic pathways modulating the activity and functional plasticity of these mechanisms contribute not only to the optimization of function during acute challenges, such as ambient temperature changes, infection and stress, but also to longitudinal adaptations to environmental and internal changes. Exposure of humans to repeated and seasonal cold ambient conditions leads to adaptations in thermoeffectors such as habituation of cutaneous vasoconstriction and shivering. In animals that undergo hibernation and torpor, neurally regulated metabolic and thermoregulatory adaptations enable survival during periods of significant reduction in metabolic rate. In addition, changes in diet can activate accessory neural pathways that alter thermoeffector activity. This knowledge may be harnessed for therapeutic purposes, including treatments for obesity and improved means of therapeutic hypothermia. Exposure to acute and long-term exposure to cold temperatures results in the activation of thermoregulatory mechanisms that are under CNS control. In this Review, Mota and Madden discuss long-term physiological adaptations to cold exposure, with an emphasis on the specific states of hibernation, torpor and obesity.
哺乳动物的大脑控制着调节体温和能量代谢的产热和散热机制。热效应器包括棕色脂肪组织、皮肤血流和骨骼肌,代谢能量源包括白色脂肪组织。调节这些机制的活性和功能可塑性的神经和代谢途径不仅有助于在环境温度变化、感染和压力等急性挑战期间优化功能,还有助于纵向适应环境和内部变化。人类反复暴露在季节性寒冷环境中会导致体温效应器的适应性变化,如皮肤血管收缩和颤抖的习惯化。在经历冬眠和冬眠的动物中,神经调节的代谢和体温调节适应性使其能够在代谢率显著降低的时期存活下来。此外,饮食的变化也会激活附属神经通路,从而改变体温调节器的活动。这些知识可用于治疗目的,包括治疗肥胖症和改进低体温治疗方法。
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引用次数: 0
The cognitive impact of light: illuminating ipRGC circuit mechanisms 光对认知的影响:ipRGC 电路机制的启示
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-01-26 DOI: 10.1038/s41583-023-00788-5
Heather L. Mahoney, Tiffany M. Schmidt
Ever-present in our environments, light entrains circadian rhythms over long timescales, influencing daily activity patterns, health and performance. Increasing evidence indicates that light also acts independently of the circadian system to directly impact physiology and behaviour, including cognition. Exposure to light stimulates brain areas involved in cognition and appears to improve a broad range of cognitive functions. However, the extent of these effects and their mechanisms are unknown. Intrinsically photosensitive retinal ganglion cells (ipRGCs) have emerged as the primary conduit through which light impacts non-image-forming behaviours and are a prime candidate for mediating the direct effects of light on cognition. Here, we review the current state of understanding of these effects in humans and mice, and the tools available to uncover circuit-level and photoreceptor-specific mechanisms. We also address current barriers to progress in this area. Current and future efforts to unravel the circuits through which light influences cognitive functions may inform the tailoring of lighting landscapes to optimize health and cognitive function. A direct influence of light exposure on cognition and behaviour, beyond that associated with circadian rhythms, has been reported. Mahoney and Schmidt consider the evidence for light’s effects on aspects of cognitive neurobehavioural performance, summarize current understanding of the underlying cellular and circuit mechanisms and point to future directions for this field of research.
光在我们所处的环境中无处不在,它长期影响着昼夜节律,影响着日常活动模式、健康和工作表现。越来越多的证据表明,光的作用也独立于昼夜节律系统,直接影响生理和行为,包括认知。光照能刺激大脑中与认知有关的区域,似乎能改善广泛的认知功能。然而,这些影响的程度及其机制尚不清楚。本征光敏视网膜神经节细胞(ipRGCs)已成为光影响非图像形成行为的主要渠道,也是介导光对认知的直接影响的主要候选者。在此,我们回顾了人类和小鼠对这些影响的理解现状,以及用于揭示回路级和光感受器特异性机制的可用工具。我们还讨论了目前该领域取得进展的障碍。目前和未来为揭示光影响认知功能的回路所做的努力,可为定制照明景观提供信息,从而优化健康和认知功能。
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引用次数: 0
Neurons in the hypothalamus counteract ageing in mice 小鼠下丘脑中的神经元能抵御衰老
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-01-25 DOI: 10.1038/s41583-024-00794-1
Joseph Willson
In mice, a subset of neurons in the dorsomedial hypothalamus control sympathetic nervous system signalling to adipose tissue and are dysregulated with age; activating these neurons prolongs lifespan and slows the decline in physical activity associated with ageing.
在小鼠体内,背内侧下丘脑中的一个神经元亚群控制着交感神经系统向脂肪组织发出的信号,并随着年龄的增长而失调;激活这些神经元可延长寿命,并减缓与衰老相关的体力活动下降。
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引用次数: 0
Curiosity: primate neural circuits for novelty and information seeking 好奇心:灵长类动物寻求新奇和信息的神经回路。
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-01-23 DOI: 10.1038/s41583-023-00784-9
Ilya E. Monosov
For many years, neuroscientists have investigated the behavioural, computational and neurobiological mechanisms that support value-based decisions, revealing how humans and animals make choices to obtain rewards. However, many decisions are influenced by factors other than the value of physical rewards or second-order reinforcers (such as money). For instance, animals (including humans) frequently explore novel objects that have no intrinsic value solely because they are novel and they exhibit the desire to gain information to reduce their uncertainties about the future, even if this information cannot lead to reward or assist them in accomplishing upcoming tasks. In this Review, I discuss how circuits in the primate brain responsible for detecting, predicting and assessing novelty and uncertainty regulate behaviour and give rise to these behavioural components of curiosity. I also briefly discuss how curiosity-related behaviours arise during postnatal development and point out some important reasons for the persistence of curiosity across generations. Animals frequently engage in curiosity-related behaviours that appear to provide them with no immediate benefits. Monosov discusses the neural circuits in the primate brain that are involved in these non-instrumental information-seeking behaviours, focusing on those that mediate the exploration of novel objects and the pursuit of information to reduce future uncertainties.
多年来,神经科学家一直在研究支持价值决策的行为、计算和神经生物学机制,揭示人类和动物如何做出选择以获得奖励。然而,除了物质奖励或二阶强化物(如金钱)的价值之外,许多决策还受到其他因素的影响。例如,动物(包括人类)经常探索没有内在价值的新奇物体,这完全是因为这些物体很新奇,而且它们表现出获取信息的欲望,以减少对未来的不确定性,即使这些信息不能带来奖励或帮助它们完成即将到来的任务。在这篇综述中,我将讨论灵长类动物大脑中负责检测、预测和评估新奇性和不确定性的回路是如何调节行为并产生好奇心的这些行为成分的。我还简要讨论了好奇心相关行为是如何在出生后的发育过程中产生的,并指出了好奇心跨代持续存在的一些重要原因。
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引用次数: 0
Goal-directed learning in adolescence: neurocognitive development and contextual influences 青春期的目标导向学习:神经认知发展和环境影响。
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-01-23 DOI: 10.1038/s41583-023-00783-w
Linda Wilbrecht, Juliet Y. Davidow
Adolescence is a time during which we transition to independence, explore new activities and begin pursuit of major life goals. Goal-directed learning, in which we learn to perform actions that enable us to obtain desired outcomes, is central to many of these processes. Currently, our understanding of goal-directed learning in adolescence is itself in a state of transition, with the scientific community grappling with inconsistent results. When we examine metrics of goal-directed learning through the second decade of life, we find that many studies agree there are steady gains in performance in the teenage years, but others report that adolescent goal-directed learning is already adult-like, and some find adolescents can outperform adults. To explain the current variability in results, sophisticated experimental designs are being applied to test learning in different contexts. There is also increasing recognition that individuals of different ages and in different states will draw on different neurocognitive systems to support goal-directed learning. Through adoption of more nuanced approaches, we can be better prepared to recognize and harness adolescent strengths and to decipher the purpose (or goals) of adolescence itself. During adolescence, we acquire skills and behavioural patterns that support our future survival through goal-directed learning. Wilbrecht and Davidow describe the neural and cognitive systems that support goal-directed learning in adolescence, as well as our growing understanding of the influence of context on this process.
青春期是我们向独立过渡、探索新活动和开始追求主要人生目标的时期。目标导向学习,即我们学习如何通过行动来获得理想的结果,是许多这些过程的核心。目前,我们对青春期目标导向学习的理解还处于过渡阶段,科学界也在努力解决结果不一致的问题。当我们研究人生第二个十年的目标导向学习指标时,我们发现许多研究都认为青少年时期的学习成绩会稳步提高,但也有一些研究报告称青少年的目标导向学习已经与成人无异,还有一些研究发现青少年的学习成绩可以超过成人。为了解释目前的结果差异,人们正在采用复杂的实验设计来测试不同情境下的学习情况。人们也越来越认识到,不同年龄和不同状态的个体会利用不同的神经认知系统来支持目标导向学习。通过采用更细致的方法,我们可以更好地认识和利用青少年的优势,并解读青春期本身的目的(或目标)。
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引用次数: 0
Tightening synaptic relations 加强突触关系
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-01-19 DOI: 10.1038/s41583-024-00793-2
Lisa Heinke
A study analyses the nanotopography of presynaptic calcium channels and release sensors and the degree of their coupling during maturation of an inhibitory synapse.
一项研究分析了抑制性突触成熟过程中突触前钙通道和释放感应器的纳米图谱及其耦合程度。
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引用次数: 0
Causation in neuroscience: keeping mechanism meaningful 神经科学中的因果关系:保持机制的意义。
IF 34.7 1区 医学 Q1 NEUROSCIENCES Pub Date : 2024-01-11 DOI: 10.1038/s41583-023-00778-7
Lauren N. Ross, Dani S. Bassett
A fundamental goal of research in neuroscience is to uncover the causal structure of the brain. This focus on causation makes sense, because causal information can provide explanations of brain function and identify reliable targets with which to understand cognitive function and prevent or change neurological conditions and psychiatric disorders. In this research, one of the most frequently used causal concepts is ‘mechanism’ — this is seen in the literature and language of the field, in grant and funding inquiries that specify what research is supported, and in journal guidelines on which contributions are considered for publication. In these contexts, mechanisms are commonly tied to expressions of the main aims of the field and cited as the ‘fundamental’, ‘foundational’ and/or ‘basic’ unit for understanding the brain. Despite its common usage and perceived importance, mechanism is used in different ways that are rarely distinguished. Given that this concept is defined in different ways throughout the field — and that there is often no clarification of which definition is intended — there remains a marked ambiguity about the fundamental goals, orientation and principles of the field. Here we provide an overview of causation and mechanism from the perspectives of neuroscience and philosophy of science, in order to address these challenges. ‘Mechanism’ is a frequently used causal concept in neuroscience but can have different meanings that are often not specified. In this Review, Ross and Bassett explore these different meanings and the challenges associated with the variable usage of this term before discussing how these challenges may be met.
神经科学研究的一个基本目标是揭示大脑的因果结构。这种对因果关系的关注是有道理的,因为因果信息可以提供大脑功能的解释,并确定可靠的目标,从而了解认知功能,预防或改变神经系统疾病和精神疾病。在这项研究中,最常用的因果概念之一是 "机制"--这在该领域的文献和语言中、在明确规定支持哪些研究的拨款和资金查询中,以及在考虑发表哪些论文的期刊指南中都可以看到。在这些语境中,"机制 "通常与该领域主要目标的表述联系在一起,并被引述为理解大脑的 "根本"、"基础 "和/或 "基本 "单位。尽管 "机制 "被普遍使用并被认为非常重要,但其使用方式却各不相同,很少有区别。鉴于该领域对这一概念的定义各不相同--而且往往没有明确说明哪种定义是正确的--该领域的基本目标、方向和原则仍然明显模糊不清。在此,我们将从神经科学和科学哲学的角度概述因果关系和机制,以应对这些挑战。
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引用次数: 0
期刊
Nature Reviews Neuroscience
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