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Neighborhood conditions and neurodevelopment: A systematic review of brain structure in children and adolescents. 邻里条件和神经发育:儿童和青少年大脑结构的系统回顾。
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-10-01 Epub Date: 2025-07-25 DOI: 10.1016/j.dcn.2025.101600
Lydia Lewis, Bria Gresham, Amy Riegelman, Ka I Ip

The neighborhood context is increasingly recognized as a significant determinant of health. Advances in geospatial analysis and neuroimaging have facilitated an emerging field of research investigating how neighborhood conditions influence brain development. We conducted a systematic review, identifying 37 studies that examined associations between neighborhood conditions and brain structure in children and adolescents. We highlight key findings and research gaps across multiple domains of neighborhood conditions - socioeconomic status, demographic composition, social environment, built environment, physical environment, and health resources. Our review suggests that adverse neighborhood socioeconomic conditions are linked to structural brain differences, including reduced brain volume and white matter, and smaller surface areas. Additionally, observed race-related disparities in brain structures may be partially explained by residence in low-resourced neighborhoods, underscoring the role of structural inequities in shaping neurodevelopment. The majority of studies relied on the Adolescent Brain Cognitive Development Study dataset, limiting the generalizability of findings. Critically, neighborhood conditions beyond socioeconomic status remain understudied, offering opportunities for future research to examine how positive conditions (e.g., social cohesion, greenspace, health resources) may foster neurodevelopment. This review emphasizes the urgent need for policies to reduce structural inequities while leveraging protective neighborhood conditions to promote equity and youth neurodevelopment.

人们日益认识到社区环境是健康的一个重要决定因素。地理空间分析和神经成像的进步促进了一个新兴的研究领域,即社区条件如何影响大脑发育。我们进行了一项系统回顾,确定了37项研究,这些研究调查了儿童和青少年的邻里环境与大脑结构之间的关系。我们强调了社区条件多个领域的主要发现和研究差距——社会经济地位、人口构成、社会环境、建筑环境、物理环境和卫生资源。我们的研究表明,不利的社区社会经济条件与大脑结构差异有关,包括脑容量和白质的减少,以及更小的表面积。此外,观察到的与种族相关的大脑结构差异可能部分解释为居住在资源匮乏的社区,强调了结构不平等在塑造神经发育中的作用。大多数研究依赖于青少年大脑认知发展研究数据集,限制了研究结果的普遍性。重要的是,社会经济地位之外的社区条件仍未得到充分研究,这为未来的研究提供了机会,以研究积极的条件(例如,社会凝聚力、绿色空间、卫生资源)如何促进神经发育。这篇综述强调了迫切需要制定政策来减少结构性不平等,同时利用保护性的邻里条件来促进公平和青少年神经发育。
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引用次数: 0
Previous institutionalization is associated with elevated functional connectivity between the nucleus accumbens and amygdala during aversive learning 先前的制度化与厌恶学习期间伏隔核和杏仁核之间的功能连接升高有关。
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-26 DOI: 10.1016/j.dcn.2025.101617
Benjamin M. Rosenberg , João F. Guassi Moreira , Adriana S. Méndez Leal , Natalie M. Saragosa-Harris , Elizabeth Gaines , Wesley J. Meredith , Clare F. McCann , Saché M. Coury , Yael Waizman , Emilia Ninova , Jennifer A. Silvers
Institutionalization is a profound form of early adversity that is associated with increased risk for internalizing disorders, which most commonly have their onset during adolescence. Developmental models emphasize how differences in childhood learning contribute to avoidance behaviors, a core pathway linking adversity to internalizing disorders. Yet, little empirical research has tested this theory. 43 previously institutionalized (PI; 12.1–22.8 years) and 47 comparison (9.9–22.9 years) youth completed an aversive learning task while undergoing fMRI. The task involved an escapable stimulus reinforced with an aversive sound (CS+r), the same stimulus without reinforcement (CS+nr), and an escapable stimulus that was never reinforced (CS-). Internalizing symptoms were measured using the parent-report Revised Child Anxiety and Depression Scales. Functional connectivity between the nucleus accumbens (NAcc) and amygdala was elevated among the PI versus comparison youth across stimuli (p = .036). Exploratory analyses found that NAcc-amygdala connectivity was elevated among the PI youth during early adolescence relative to late adolescence (p = .009). Institutionalization may impact neurodevelopment in ways that increase responsiveness of threat neurocircuitry across threatening and safe stimuli. Differences in NAcc-amygdala functional connectivity may attenuate with age following adoption.
制度化是早期逆境的一种深刻形式,与内化障碍的风险增加有关,内化障碍最常见于青春期。发展模型强调儿童学习的差异如何促成回避行为,这是将逆境与内化障碍联系起来的核心途径。然而,很少有实证研究对这一理论进行检验。43名先前被收容的青年(PI; 12.1-22.8岁)和47名对照青年(9.9-22.9岁)在接受功能磁共振成像时完成了厌恶学习任务。该任务包括一个带有厌恶声音的可逃避刺激(CS+r)、一个没有强化的相同刺激(CS+nr)和一个从未强化的可逃避刺激(CS-)。内化症状使用父母报告修订儿童焦虑和抑郁量表进行测量。在不同的刺激下,青少年的伏隔核(NAcc)和杏仁核之间的功能连通性有所提高(p = .036)。探索性分析发现,相对于青春期晚期,PI青年在青春期早期的nacc -杏仁核连通性有所提高(p = .009)。制度化可能通过增加威胁神经回路对威胁和安全刺激的反应性的方式影响神经发育。nacc -杏仁核功能连通性的差异可能随着收养后年龄的增长而减弱。
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引用次数: 0
Longitudinal habituation and novelty detection neural responses from infancy to early childhood in The Gambia and UK 纵向习惯和新奇检测神经反应从婴儿期到幼儿期在冈比亚和英国。
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-25 DOI: 10.1016/j.dcn.2025.101619
Anna Blasi Ribera , Borja Blanco Maniega , Samantha McCann , Ebrima Mbye , Ebou Touray , Maria Rozhko , Bosiljka Milosavljevic , Laura Katus , Mariama Saidykhan , Muhammed Ceesay , Tijan Fadera , Giulia Ghillia , Marta Perapoch Amado , Maria M. Crespo-Llado , Sophie E. Moore , Clare E. Elwell , Sarah Lloyd-Fox , The BRIGHT Project team
As infants and young children learn from and respond to their environment, their development is driven by their ability to filter out irrelevant stimuli and respond to salient stimuli. While sources and types of stimuli vary across cultural contexts, research to understand the neural mechanisms of these behaviors have largely focused on relatively homogeneous populations in high income settings. To address this lack of diverse representation the Brain Imaging for Global health project (BRIGHT) collected longitudinal data in The Gambia (N = 204) and the UK (N = 61). Here we present results of the Habituation and Novelty Detection (HaND) fNIRS neuroimaging task. Gambian infants showed persistent response suppression (Habituation) at all visits (from 5mo to 60mo) while Novelty Detection was only observed once infants reached 18 and 24mo. In the UK, infants only showed persistent habituation from 5 to 12mo, while the response was not evident at 18 and 24mo. Furthermore, in contrast to The Gambia, alongside the habituation patterns observed Uk infants showed novelty detection from 5 to 12mo. This is the first longitudinal description of the HaND response in individuals from different contextual backgrounds across such a broad age range and number of time points, revealing different patterns of specialization in The Gambia and UK.
当婴幼儿从他们的环境中学习并做出反应时,他们的发展是由他们过滤不相关刺激和对显著刺激做出反应的能力驱动的。虽然刺激的来源和类型因文化背景而异,但了解这些行为的神经机制的研究主要集中在高收入环境中相对同质的人群。为了解决这一缺乏多样化代表性的问题,脑成像促进全球健康项目(BRIGHT)在冈比亚(N = 204)和英国(N = 61)收集了纵向数据。在此,我们介绍了习惯化和新颖性检测(HaND)近红外神经成像任务的结果。冈比亚婴儿在所有访问中(从5个月到60个月)都表现出持续的反应抑制(习惯化),而新奇检测仅在婴儿达到18和24个月时观察到。在英国,婴儿仅在5至12个月期间表现出持续的习惯,而在18和24个月时则不明显。此外,与冈比亚相比,除了观察到的习惯模式外,英国婴儿在5到12个月期间表现出新奇感。这是第一次对来自不同背景的个体在如此广泛的年龄范围和时间点上的HaND反应进行纵向描述,揭示了冈比亚和英国不同的专业化模式。
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引用次数: 0
Understanding adolescent anxiety through a neurodevelopmental lens: A comparative review of rodents and humans 从神经发育的角度理解青少年焦虑:啮齿动物和人类的比较回顾
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-25 DOI: 10.1016/j.dcn.2025.101620
Caitlyn R. Cody , Rebecca R. Hennessy , Heather C. Brenhouse, Juliet Y. Davidow
Adolescence is a dynamic time period, marked by significant neural and behavioral maturation. However, much remains unknown about how this maturation alters the way anxiety is expressed in this population, or how similar behavioral patterns may arise from divergent neural underpinnings. This translational review describes key differences between adolescent and adult manifestation of anxiety in rodents and humans. We suggest potential underlying developmental mechanisms in behavior and the brain across species that may contribute to age-related differences. We focus on cognitive factors that play a role in or are impaired by anxiety within three domains: fear, reward, and attentional processing. We review how and to what degree these processes and their interactions with anxiety manifest in youth compared to adults, and where known, with underlying neural circuits across species. Therefore, this review aims to provide insight into the translational neural and behavioral developmental nuances of anxiety in order to encourage further anxiety research utilizing adolescent humans and rodents.
青春期是一个动态的时期,以显著的神经和行为成熟为标志。然而,关于这种成熟如何改变焦虑在这一人群中的表达方式,或者相似的行为模式如何从不同的神经基础中产生,还有很多未知之处。这篇翻译综述描述了啮齿动物和人类的青少年和成人焦虑表现之间的关键差异。我们认为,跨物种的行为和大脑中潜在的潜在发育机制可能会导致年龄相关的差异。我们关注在焦虑中起作用或受焦虑影响的认知因素,包括三个领域:恐惧、奖励和注意力处理。我们回顾了与成年人相比,这些过程及其与焦虑的相互作用如何以及在多大程度上在年轻人中表现出来,以及在已知的情况下,跨物种的潜在神经回路。因此,本综述旨在提供对焦虑的转化神经和行为发育的细微差别的见解,以鼓励进一步利用青少年人类和啮齿动物进行焦虑研究。
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引用次数: 0
Functional organization of the allostatic interoceptive network in adolescence: Links to peer victimization and prospective depressive symptoms 青少年适应内感受网络的功能组织:与同伴伤害和预期抑郁症状的联系。
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-25 DOI: 10.1016/j.dcn.2025.101621
Natalie G. Frye , Tehila Nugiel , Gabriella M. Alvarez , Mitch J. Prinstein , Jessica R. Cohen , Eva H. Telzer , Kristen A. Lindquist
The present study examines the role of brain network organization in the prospective prediction of adolescent depressive symptoms and links to the social and psychological context. Using a path model with data from a larger longitudinal study of adolescents beginning in 6th-8th grade (N = 117, 55 % female, Mage at scan= 12.99), we first established that organizational properties of brain networks theoretically linked to depression predicted greater depressive symptoms two years later. Specifically, when controlling for gender and initial depression, greater global efficiency of the allostatic interoceptive network (AIN) and greater segregation of the frontoparietal network (FPN) from the salience network (SN) predicted depressive symptoms an average of two years later. Linking these neural findings to psychological individual differences, we found that self-reported rumination mediated the effect of AIN global efficiency on prospective depressive symptoms. We further linked these neural findings to the social context by demonstrating that greater self-reported relational peer victimization prospectively predicted AIN global efficiency. Collectively, these findings situate the emergence of adolescent depressive symptoms as a confluence of brain organization properties, perceived social rejection, and individual differences in rumination.
本研究探讨了大脑网络组织在青少年抑郁症状的前瞻性预测中的作用,以及与社会和心理环境的联系。使用一个路径模型,该模型的数据来自于对6 -8年级开始的青少年的更大的纵向研究(N = 117,55 %女性,扫描时的图像= 12.99),我们首先确定了与抑郁有关的大脑网络的组织特性在理论上预测了两年后更大的抑郁症状。具体来说,在控制性别和初始抑郁的情况下,适应内感网络(AIN)的整体效率更高,额顶叶网络(FPN)与显著性网络(SN)的分离程度更高,平均两年后预测抑郁症状。将这些神经发现与心理个体差异联系起来,我们发现自我报告的反刍介导了AIN整体效率对预期抑郁症状的影响。我们进一步将这些神经研究结果与社会背景联系起来,证明了更大的自我报告的关系同伴受害前瞻性地预测了AIN的整体效率。总的来说,这些发现将青少年抑郁症状的出现定位为大脑组织特性、感知到的社会排斥和反刍的个体差异的汇合。
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引用次数: 0
Academic success and mental health: The paradox of Frontoparietal‐Default Mode Network coupling among children facing poverty 学业成功与心理健康:贫困儿童额顶叶-默认模式网络耦合的悖论
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-25 DOI: 10.1016/j.dcn.2025.101618
Selina Pacheco , Silvia A. Bunge , Monica E. Ellwood-Lowe
Childhood family income is a powerful predictor of academic achievement and mental health. Here, we ask whether children living in poverty who succeed academically are subsequently protected from, or at risk for, internalizing symptoms. Prior research indicates that children in poverty with better academic performance tend to have higher temporal coupling between the Lateral Frontoparietal Network (LFPN) and Default Mode Network (DMN) than lower-performing children in poverty. An open question is whether higher LFPN-DMN coupling has maladaptive long-term consequences for mental health for this population. In this pre-registered longitudinal study, we analyzed data from 10,829 children (1931 in poverty) in the ABCD study across four time points (ages 9–13). Higher grades correlated with fewer internalizing symptoms concurrently; this association was more pronounced for children below poverty. Longitudinally, higher LFPN-DMN related to more internalizing symptoms two years later for children in poverty in particular. Thus, although higher academic performance was associated with better mental health outcomes for all children, the specific pattern of LFPN-DMN connectivity that supports academic resilience among children in poverty may be a risk factor for developing internalizing symptoms. These findings highlight the complex nature of academic resilience in the context of structural inequity.
童年家庭收入是学习成绩和心理健康的有力预测指标。在这里,我们要问的是,在学业上取得成功的贫困儿童是否随后受到保护,免受内化症状的影响,或者面临内化症状的风险。已有研究表明,学习成绩较好的贫困儿童的侧额顶叶网络(LFPN)和默认模式网络(DMN)的时间耦合高于学习成绩较差的贫困儿童。一个悬而未决的问题是,更高的LFPN-DMN耦合是否会对这一人群的心理健康产生不适应的长期后果。在这项预先登记的纵向研究中,我们分析了ABCD研究中四个时间点(9-13岁)的10,829名儿童(1931名贫困儿童)的数据。分数越高,内化症状越少;这种联系在贫困儿童中更为明显。纵向上,较高的LFPN-DMN与两年后更多的内化症状有关,特别是贫困儿童。因此,尽管较高的学习成绩与所有儿童较好的心理健康结果相关,但支持贫困儿童学业弹性的LFPN-DMN连接的特定模式可能是发展内化症状的风险因素。这些发现突出了结构不平等背景下学术弹性的复杂性。
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引用次数: 0
Analysis of event-related potential difference waves can benefit from linear mixed effects modeling: Recommendations for analyses and general model fitting 事件相关的电位差波分析可以受益于线性混合效应建模:分析和一般模型拟合的建议。
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-19 DOI: 10.1016/j.dcn.2025.101614
Megan J. Heise , Serena K. Mon , Lindsay C. Bowman
Linear mixed effects models (LMEs) have advantages for analyzing mean amplitude event-related potential (ERP) data. Compared to ANOVA and linear regression, LMEs retain more subjects and yield unbiased parameter estimates by accounting for trial-level sources of variability. However, LME analysis of ERP mean amplitude difference waves may be problematic due to the need to pair single trial data to create trial-level difference waves. In both simulated and real pediatric ERP data, the present study compares ERP difference wave results across conventional ANOVA/regression analyses and six trial-level LME approaches in different low trial-count scenarios. We evaluate each approach based on accuracy of estimates and statistical power in simulated data, and magnitude of effect detected in real ERP data from 3- to 5-year-old neurotypical children (N = 64). Two analysis approaches were unbiased: creating trial-level difference waves by pairing trials on all study design features (the ‘exact match’ approach) and fitting an interaction term; and the interaction term had greater power to detect a significant effect in simulated data. Both simulations and analysis of real preschooler ERP data support using LMEs to analyze difference waves. We also include recommendations for researchers for picking a difference wave approach appropriate for their research question.
线性混合效应模型(LMEs)在分析平均振幅事件相关电位(ERP)数据方面具有优势。与方差分析和线性回归相比,LMEs保留了更多的受试者,并通过考虑试验水平的变异性来源产生无偏参数估计。然而,由于需要配对单个试验数据来创建试验水平的差波,因此对ERP平均振幅差波的LME分析可能存在问题。在模拟和真实儿科ERP数据中,本研究比较了在不同低试验数情况下,传统方差分析/回归分析和六种试验水平LME方法的ERP差异波结果。我们根据估计的准确性和模拟数据的统计能力,以及在3至5岁神经典型儿童的真实ERP数据中检测到的效应幅度来评估每种方法(N = 64)。两种分析方法是无偏的:通过对所有研究设计特征进行配对试验(“精确匹配”方法)和拟合交互项来产生试验水平的差异波;在模拟数据中,交互项具有更大的检测显著效应的能力。对真实学龄前儿童ERP数据的模拟和分析均支持使用LMEs分析差异波。我们还为研究人员提供了选择适合其研究问题的差波方法的建议。
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引用次数: 0
Neural network topology in children’s deceptive behaviors: The role of cognitive control and reward processing 神经网络拓扑在儿童欺骗行为中的作用:认知控制和奖励加工的作用
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-10 DOI: 10.1016/j.dcn.2025.101613
Liwen Yu , Meng Dai , Pei Huang , Birit F.P. Broekman , Michael Meaney , Yap Seng Chong , Marielle Valerie Fortier , Peipei Setoh , Henning Tiemeier , Ai Peng Tan , Xiao Pan Ding
The neural mechanisms related to children’s deceptive behaviors remain relatively unexplored. This study aims to address this gap by using measures of functional brain network topology, focusing on the cognitive control and reward processing networks that are closely related to children’s deceptive behaviors. The study included 113 6-year-old children from the Growing Up in Singapore Towards Healthy Outcomes (GUSTO) project, a birth cohort study. Children participated in the Dart Game designed to assess their tendencies to cheat and lie. During the game, children were required to throw the ball at a long-distance dartboard without supervision, which provided opportunities to cheat by breaking the rules. After the game, children were questioned about whether they had followed the rule, which provided them with opportunities to lie. Resting-state functional magnetic resonance imaging (rs-fMRI) data were collected from all children at the same age during a different visit. We compared three network topology measures (cognitive control network recruitment, reward processing network recruitment and reward-control network integration) between non-cheaters and cheaters, as well as between non-liars and liars. The results showed that a higher degree of cognitive control network recruitment was associated with a greater likelihood of lying. Moreover, a higher degree of reward-cognitive control network integration was associated with a lower likelihood of cheating and lying. The degree of reward processing network recruitment was not associated with deceptive behaviors. These findings help to elucidate how neural mechanisms of cognitive control and reward processing contribute to deceptive behaviors in young children.
与儿童欺骗行为相关的神经机制尚未得到充分的研究。本研究旨在通过功能脑网络拓扑测量来解决这一空白,重点关注与儿童欺骗行为密切相关的认知控制和奖励处理网络。该研究包括113名来自新加坡健康成长项目(GUSTO)的16岁儿童,这是一项出生队列研究。孩子们参加了旨在评估他们欺骗和撒谎倾向的飞镖游戏。在游戏中,孩子们被要求在没有监督的情况下将球扔向一个远距离的飞镖靶,这就为违反规则作弊提供了机会。游戏结束后,孩子们被问及他们是否遵守了规则,这给了他们撒谎的机会。静息状态功能磁共振成像(rs-fMRI)数据收集自同一年龄的所有儿童在不同的访问期间。我们比较了三种网络拓扑测量(认知控制网络招募、奖励处理网络招募和奖励-控制网络整合)在非撒谎者和撒谎者之间,以及在非撒谎者和撒谎者之间。结果表明,认知控制网络的激活程度越高,说谎的可能性越大。此外,较高程度的奖励-认知控制网络整合与较低的作弊和说谎可能性相关。奖励处理网络招募的程度与欺骗行为无关。这些发现有助于阐明认知控制和奖励加工的神经机制如何影响幼儿的欺骗行为。
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引用次数: 0
Age-related patterns of resting EEG power in infancy: Associations with prenatal socioeconomic disadvantage 婴儿期静息脑电图功率的年龄相关模式:与产前社会经济劣势的关联
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-09-08 DOI: 10.1016/j.dcn.2025.101611
Aislinn Sandre , Sonya V. Troller-Renfree , Melina Amarante , Amanda M. Dettmer , Jerrold S. Meyer , Kimberly G. Noble
The brain develops rapidly during the prenatal period and first two years of life, making it particularly sensitive to environmental influences. Family socioeconomic disadvantage is one environmental factor that may shape the development of brain function in infancy. However, it is unclear how brain function changes across infancy or whether prenatal family socioeconomic disadvantage is associated with age-related differences in brain function during this period. Here, we examine whether resting electroencephalography (EEG) power (theta, alpha, beta, and gamma) shows linear and/or non-linear age-related patterns across four assessments from 1 to 18 months of age (N = 165), and whether these patterns are moderated by prenatal family socioeconomic disadvantage. We find that lower-frequency (relative theta) and higher-frequency (relative alpha, beta, and gamma) power show non-linear age-related patterns during the first 18 months of life. Prenatal family socioeconomic disadvantage moderates these patterns, such that infants from lower-income families show less steep age-related decreases in lower-frequency (relative theta) power and less steep increases in higher-frequency (relative beta) power. These associations hold when adjusting for other prenatal and postnatal experiences, as well as infant demographic and health-related factors. These data suggest that lower prenatal family income is associated with age-related differences in brain function during infancy.
大脑在产前和出生后的头两年发育迅速,因此对环境影响特别敏感。家庭社会经济劣势是影响婴儿大脑功能发育的一个环境因素。然而,目前尚不清楚大脑功能在婴儿期是如何变化的,也不清楚产前家庭社会经济劣势是否与这一时期大脑功能的年龄相关差异有关。在这里,我们研究了静息脑电图(EEG)功率(theta, alpha, beta和gamma)是否在1至18个月大的四次评估中显示线性和/或非线性的年龄相关模式(N = 165),以及这些模式是否受到产前家庭社会经济劣势的调节。我们发现,低频(相对θ)和高频(相对α、β和γ)功率在生命的前18个月表现出与年龄相关的非线性模式。产前家庭的社会经济劣势缓和了这些模式,例如,低收入家庭的婴儿在低频(相对θ)功率方面表现出较低的与年龄相关的急剧下降,而在高频(相对β)功率方面表现出较低的急剧增加。在调整了其他产前和产后经历以及婴儿人口统计学和健康相关因素后,这些关联仍然成立。这些数据表明,较低的产前家庭收入与婴儿时期大脑功能的年龄相关差异有关。
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引用次数: 0
Differential microstructural development within sensorimotor cortical regions: A diffusion MRI study in preterm and full-term infants 感觉运动皮质区显微结构发育差异:早产儿和足月婴儿弥散MRI研究
IF 4.9 2区 医学 Q1 NEUROSCIENCES Pub Date : 2025-08-30 DOI: 10.1016/j.dcn.2025.101610
Alexandra Brandstaetter , Andrea Gondová , Laurie Devisscher , Denis Rivière , Guillaume Auzias , Yann Leprince , Jessica Dubois
The sensorimotor system develops early in utero and supports the emergence of body representations critical for perception, action, and interaction with environment. While somatotopic protomaps are already developed in the primary somatosensory and motor cortices in late pregnancy, little is known about the anatomical substrates of this functional specialization. In this study, we aimed to decipher the microstructural properties of these regions in the developing brain. Using advanced diffusion MRI and post-processing tools, we parcellated the pre- and post-central gyri into microstructurally distinct clusters along the lateral-to-medial axis in 25 full-term neonates, confirming the early differentiation within sensorimotor regions. These clusters were further analyzed in 59 preterm infants scanned at term-equivalent age (TEA, PTTEA), of which 45 were also scanned near birth (PTBirth), and compared with another group of 59 full-term neonates. Applying a multivariate Mahalanobis distance approach, we quantified deviations in preterm cortical microstructure relative to the full-term reference. Preterm infants showed significant region- and position-specific deviations at both ages, though these were smaller at TEA (repeated-measures ANCOVA: PTBirth: region effect F=25.48, position effect F=16.06; PTTEA: region effect F=14.87, all p < 0.001), consistently with ongoing maturation during the pre-term period. Differences between the pre- and post-central gyri, and along the somatotopic axis, suggested differential vulnerability to prematurity. In particular, compared with somatosensory regions, the motor regions appeared to be at a more advanced stage of maturation close to birth (paired t-test, T = -4.388, p < 0.001) and less vulnerable at TEA (paired t-test, T = -4.169, p < 0.001), suggesting lesser impact of prematurity. An opposite pattern was observed, particularly close to birth, for lateral positions related to mouth representation compared with intermediary (paired t-test: T = 5.933, p < 0.001) and medial (paired t-test: T = 4.712, p < 0.001) positions. These findings support the notion that early sensorimotor cortical specialization is microstructurally emergent during gestation and sensitive to atypical developmental context of preterm birth.
感觉运动系统在子宫早期发育,支持对感知、行动和与环境互动至关重要的身体表征的出现。虽然在妊娠后期初级体感觉和运动皮质中已经形成了体位原图,但对这种功能专门化的解剖学基础知之甚少。在这项研究中,我们的目的是破译这些区域在发育中的大脑的微观结构特性。利用先进的弥散MRI和后处理工具,我们在25个足月新生儿中沿外侧至内侧轴将中央后回和中央前回包裹成微观结构上不同的簇,证实了感觉运动区域的早期分化。这些聚类进一步分析了59例足月年龄扫描的早产儿(TEA, PTTEA),其中45例也在临近出生时扫描(PTBirth),并与另一组59例足月新生儿进行了比较。应用多元马氏距离法,我们量化了早产儿皮层微观结构相对于足月参照的偏差。早产儿在两个年龄段都表现出显著的区域和体位特异性偏差,尽管这些偏差在TEA时较小(重复测量ANCOVA: PTBirth:区域效应F=25.48,体位效应F=16.06; PTTEA:区域效应F=14.87,均p <; 0.001),与早产儿的持续成熟一致。中枢前回和中枢后回之间的差异,以及沿体位轴的差异,表明对早产的不同易感性。特别是,与体感觉区相比,运动区似乎在接近出生时处于更成熟的阶段(配对T检验,T = -4.388,p <; 0.001),并且在TEA时不那么脆弱(配对T检验,T = -4.169,p <; 0.001),表明早产的影响较小。与中间位置(配对T检验:T = 5.933,p <; 0.001)和中间位置(配对T检验:T = 4.712,p <; 0.001)相比,观察到相反的模式,特别是在接近出生时,与嘴巴表征相关的侧位。这些发现支持了早期感觉运动皮层特化在妊娠期间微观结构上出现的观点,并对早产的非典型发育环境敏感。
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Developmental Cognitive Neuroscience
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