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Воробьева Алисия Нуньес

Факультет социальных наук

Профиль на hse.ru ↗ тел.: 23370
Публикаций
12
Языков
1
Наград
5
Конференций
3
Профиль Публикации (12) Курсы (9)

Профессиональные интересы

нейроэкономиканейрокогнитивные исследования

Должности

  • Доцент — Факультет социальных наук, Департамент психологии

Био

  • · Начала работать в НИУ ВШЭ в 2015 году.
  • · Научно-педагогический стаж: 9 лет.

Образование

  • 2019 · Аспирантура: Национальный исследовательский университет "Высшая школа экономики", специальность «Психологические науки», квалификация «Исследователь. Преподаватель-исследователь»
  • 2016 · Магистратура: Национальный исследовательский университет "Высшая школа экономики", специальность «Психология», квалификация «Магистр»
  • 2014 · Специалитет: Московский государственный университет им. М.В. Ломоносова, специальность «Психология», квалификация «Психолог. Преподаватель психологии»

Опыт работы

  • · До НИУ ВШЭ трудового стажа не имела

Награды и поощрения

  • · Персональная надбавка ректора (2021–2022)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023)
  • · Надбавка за регулярные публикации в международных рецензируемых научных изданиях (2025–2030)
  • · Лучший преподаватель — 2025
  • · Группа высокого профессионального потенциала (кадровый резерв НИУ ВШЭ)Категория "Новые исследователи" (2018)

Конференции (3)

Показать все
  • · 2019: 25th Annual Meeting of the Organization for Human Brain Mapping (OHBM 2019) (Рим). Доклад: The role of the medial temporal lobe in context-dependent memory retrieval
  • · 2018: 2018 International Conference on Learning and Memory (Huntington Beach, CA). Доклад: Role of the medial prefrontal cortex in congruency-based memorization: an rTMS study
  • · 2017: 2nd International Brain Stimulation Conference (Барселона). Доклад: Continuous theta-burst stimulation of medial prefrontal cortex enhances schema-linked encoding

Идентификаторы исследователя

Публикации (12)

Functional segregation of rostral and caudal hippocampus in associative memory

2025 · ARTICLE · en

Introduction: The hippocampus plays a crucial role in episodic memory. Given its complexity, the hippocampus participates in multiple aspects of higher cognitive functions, among which are semantics-based encoding and retrieval. However, the “where,” “when” and “how” of distinct aspects of memory processing in the hippocampus are still under debate. Methods: Here, we employed a visual associative memory task that involved encoding three levels of subjective congruence to delineate the differential involvement of the rostral and caudal portions (also referred as anterior/posterior portions) of the human hippocampus during memory encoding, recognition and associative recall. Results: Through stereo-EEG recordings in epilepsy patients we show that associative memory is reflected by rostral hippocampal activity during encoding, and caudal hippocampal activity during retrieval. In contrast, recognition memory encoding selectively activates the rostral hippocampus. The temporal dynamics of memory processing are manifested by gamma power increase, which partially overlaps with low-frequency power decrease during encoding and retrieval. Congruence levels modulate low-frequency activity prominently in the caudal hippocampus. Discussion: These findings highlight an anatomical segregation in the hippocampus in accordance with the contributions of its partitions to associative and recognition memory.

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Newly acquired word-action associations trigger auditory cortex activation during movement preparation: Implications for Hebbian plasticity in action word learning

2025 · ARTICLE · en

Action word learning is believed to rely on mechanisms of Hebbian learning. However, this biological mechanism requires activation of the neural assemblies representing a word form and a corresponding movement to repeatedly overlap in time. In reality, though, these associated events could be separated by seconds. In the current MEG study, we examined trial-and-error learning of associations between novel auditory pseudowords and movements of specific body parts. We aimed to explore how the brain bridges the temporal gap between the transient activity evoked by auditory input and the preparatory motor activation before the corresponding movement. To address this, we compared learning-induced changes in neuromagnetic responses locked to the onset of the stimulus and to the onset of the movement. As learning progressed, both types of neural responses showed sustained enhancement during the delay period between the auditory pseudoword and the required movement. Cortical sources of this learning-induced increase were localized bilaterally in the lateral and medial temporal cortices. Notably, the learning effect was significantly stronger when measured time-locked to the movement onset, rather than to the pseudoword onset. This suggests that once pseudoword-movement associations were reliably acquired, extensive regions of the auditory cortex were reactivated in synchrony with the preparation for the upcoming movement. Such reactivation likely served to bring together in time the representations of the correct action and the preceding auditory cue. This temporal alignment could enable Hebbian learning, leading to long-lasting synaptic changes in temporally correlated neural assemblies

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Posterior parietal cortex is causally involved in reward valuation but not in probability weighting during risky choice

2024 · ARTICLE · en

This study provides evidence that the posterior parietal cortex is causally involved in risky decision making via the processing of reward values but not reward probabilities. In the within-group experimental design, participants performed a binary lottery choice task following transcranial magnetic stimulation of the right posterior parietal cortex, left posterior parietal cortex, and a right posterior parietal cortex sham (placebo) stimulation. The continuous theta-burst stimulation protocol supposedly downregulating the cortical excitability was used. Both, mean–variance and the prospect theory approach to risky choice showed that the posterior parietal cortex stimulation shifted participants toward greater risk aversion compared with sham. On the behavioral level, after the posterior parietal cortex stimulation, the likelihood of choosing a safer option became more sensitive to the difference in standard deviations between lotteries, compared with sham, indicating greater risk avoidance within the mean–variance framework. We also estimated the shift in prospect theory parameters of risk preferences after posterior parietal cortex stimulation. The hierarchical Bayesian approach showed moderate evidence for a credible change in risk aversion parameter toward lower marginal reward value (and, hence, lower risk tolerance), while no credible change in probability weighting was observed. In addition, we observed anecdotal evidence for a credible increase in the consistency of responses after the left posterior parietal cortex stimulation compared with sham.

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The Influence of Body Posture on the Mirror Neuron System

2024 · ARTICLE · en

Система зеркальных нейронов (СЗН) широко изучается в научном сообществе, однако до сих пор не выявлено влияние положения тела на функционирование СЗН, а также на возбуждающую и ингибиторную системы мозга. В нашем исследовании мы исследовали работу СЗН при повороте головы. Участники наблюдали за видео с движением руки: за движениями мизинца, указательного пальца неподвижной руки в трех положениях головы (с поворотом головы на лево, прямо и справа), в сочетании с транскраниальной магнитной стимуляцией (ТМС) в различные промежутки времени. Результаты выявили значительное взаимодействие между типом движения и целевой мышцей (F [1,113–16,688] = 9.47, MSE = 56296,14, p = 0.006, частичное η2 = 0.39), что указывает на значительное увеличение активации первой дорсальной межкостной мышцы (FDI), что указывает на значительное увеличение активации мышцы FDI во время наблюдения за движением указательного пальца (p = 0.01) и нейтральным движением (p =

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Transcranial magnetic stimulation of the left middle frontal gyrus modulates the information people communicate in different social contexts

2023 · ARTICLE · en

Neocortical structures of the left frontal lobe, middle frontal gyrus (MFG) in particular, have been suggested to be linked to the processing of punishing and unpleasant outcomes in decision tasks. To assess the role of left MFG (lMFG) in communicative decisions, we used repetitive transcranial magnetic stimulation (rTMS) to inhibit its function during communicational exchanges under two types of social contexts: formal and informal. Three groups of participants received an offline 1-Hz inhibitory rTMS of lMFG, right MFG as an active control site, or lMFG sham/placebo TMS as a passive control condition. Participants’ task included answering difficult general-knowledge questions, rating their confidence in their answers’ correctness, and, finally, deciding if they would report or withhold these answers in formal and informal social contexts. There were significantly more reported than withheld answers in the informal context in all groups. The formal context showed no differences between reported and withheld answers in both control conditions, while, crucially, real rTMS of lMFG produced a different pattern, with more withheld than reported answers. Thus, lMFG inhibition seems to result in more rational decisions made only in formal communication contexts, where there is a perception of a certain pressure or possible negative outcomes. In informal social contexts and in the absence of negative consequences the pattern of answers did not change, regardless of the reporting strategy or the TMS protocol used. These results suggest selective context-dependent involvement of the lMFG in decision-making processes during communicational exchanges taking place under social pressure.

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Dorsolateral prefrontal cortex plays causal role in probability weighting during risky choice

2022 · ARTICLE · en

In this study, we provide causal evidence that the dorsolateral prefrontal cortex (DLPFC) supports the computation of subjective value in choices under risk via its involvement in probability weighting. Following offline continuous theta-burst transcranial magnetic stimulation (cTBS) of the DLPFC subjects (N = 30, mean age 23.6, 56% females) completed a computerized task consisting of 96 binary lottery choice questions presented in random order. Using the hierarchical Bayesian modeling approach, we then estimated the structural parameters of risk preferences (the degree of risk aversion and the curvature of the probability weighting function) and analyzed the obtained posterior distributions to determine the effect of stimulation on model parameters. On a behavioral level, temporary downregulation of the left DLPFC excitability through cTBS decreased the likelihood of choosing an option with higher expected reward while the probability of choosing a riskier lottery did not significantly change. Modeling the stimulation effects on risk preference parameters showed anecdotal evidence as assessed by Bayes factors that probability weighting parameter increased after the left DLPFC TMS compared to sham.

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Скорость обработки гиппокампом контекстуальной информации связана с ее конгруэнтностью ранее сформированным схемам

2022 · ARTICLE · ru

Одним из важнейших механизмов, обеспечивающих гибкую регуляцию поведения, является способность сличать и интегрировать имеющуюся у субъекта информацию о мире с информацией, постоянно поступающей извне. В настоящей работе мы с помощью стереоэлектроэнцефалографии регистрировали гиппокампальный локальный полевой потенциал у испытуемых, выполнявших задачу на оценку конгруэнтности пар стимулов “предмет–контекст”. Мы показали, что гиппокамп вовлечен в обработку информации о конгруэнтности предмета контексту. Обработка информации, конгруэнтной cформированному ранее семантическому знанию, сопровождается более ранней активацией гиппокампа по сравнению с обработкой информации, требующей установления новых ассоциативных связей.

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Исследования эпизодической памяти методом интракраниальной электроэнцефалографии: возможности, ограничения, результаты

2022 в печати · ARTICLE · ru

Стереотаксическая электроэнцефалография (сЭЭГ) и электрокортикография (ЭКоГ) — методы, принадлежащие к группе интракраниальных (инвазивных) ЭЭГ-методов (иЭЭГ). Данные методы используют регистрациюизменений локального полевого потенциала (ЛПП) при помощи инвазивных электродов, стереотаксически введенных в область интереса (в случае сЭЭГ) или помещенных субдурально на поверхность коры больших полушарий головного мозга (в случае ЭКоГ). На сегодняшний день эти методы используются в клинической практике в рамках диагностики и терапии различных неврологических заболеваний. Кроме того, их использование возможно для фундаментальных исследований различных когнитивных и сенсомоторных процессов. Данный обзор посвящен преимуществам и ограничениям метода иЭЭГв исследованиях эпизодической памяти человека, а также основным результатам, полученным с его помощью: дифференциации функциональных ролей структур медиальной височной доли, временной динамике их активации, а также роли осцилляций в различных частотных диапазонах для координации локальной и глобальной активности в ходе процессов, связанных с эпизодической памятью.

Online and offline effects of transcranial alternating current stimulation of the primary motor cortex

2021 · ARTICLE · en

Transcranial alternating current stimulation (tACS) is a non-invasive brain stimulation technique that allows interaction with endogenous cortical oscillatory rhythms by means of external sinusoidal potentials. The physiological mechanisms underlying tACS effects are still under debate. Whereas online (e.g., ongoing) tACS over the motor cortex induces robust state-, phase- and frequency-dependent effects on cortical excitability, the offline effects (i.e. after-effects) of tACS are less clear. Here, we explored online and offline effects of tACS in two single-blind, sham-controlled experiments. In both experiments we used neuronavigated transcranial magnetic stimulation (TMS) of the primary motor cortex (M1) as a probe to index changes of cortical excitability and delivered M1 tACS at 10 Hz (alpha), 20 Hz (beta) and sham (30 s of low-frequency transcranial random noise stimulation; tRNS). Corticospinal excitability was measured by single pulse TMS-induced motor evoked potentials (MEPs). tACS was delivered online in Experiment 1 and offline in Experiment 2. In Experiment 1, the increase of MEPs size was maximal with the 20 Hz stimulation, however in Experiment 2 neither the 10 Hz nor the 20 Hz stimulation induced tACS offline effects. These findings support the idea that tACS affects cortical excitability only during online application, at least when delivered on the scalp overlying M1, thereby contributing to the development of effective protocols that can be applied to clinical populations.

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Transcranial direct current stimulation effects on memory consolidation: timing matters.

2019 · ARTICLE · en

Transcranial direct current stimulation (tDCS) is a promising tool for modulation of learning and memory, allowing to transiently change cortical excitability of specific brain regions with physiological and behavioral outcomes. A detailed exploration of factors that can moderate tDCS effects on episodic long-term memory (LTM) is of high interest due to the clinical potential for patients with traumatic or pathological memory deficits and with cognitive impairments. This commentary discusses findings by Marián et al. (2018) recently published in Cortex within a broad context of brain stimulation in memory research.

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Курсы (9)