Amygdala-Prefrontal in Fear Extinction
Causal Dynamics of Human Amygdala-Prefrontal Circuits During Fear Extinction Learning
Visão geral do estudo
Status
Status
Condições
Condições
Intervenção / Tratamento
Intervenção / Tratamento
Descrição detalhada
Tipo de estudo
Tipo de estudo
Inscrição (Estimado)
Inscrição
Estágio
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
Contato de estudo
- Nome: Tao Xie, PhD
- Número de telefone: 314-747-1443
- E-mail: xiet@wustl.edu
Estude backup de contato
- Nome: Peter Brunner, PhD
- Número de telefone: 314-747-1443
- E-mail: pbrunner@wustl.edu
Locais de estudo
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Missouri
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St Louis, Missouri, Estados Unidos, 63110-1010
- Recrutamento
- Washington University School of Medicine
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Contato:
- Juliana Amaral Passipieri, PhD
- Número de telefone: 314-747-1443
- E-mail: ajuliana@wustl.edu
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Contato:
- Tao Xie, PhD
- Número de telefone: 314-747-1443
- E-mail: xiet@wustl.edu
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Investigador principal:
- Tao Xie, PhD
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Critérios de participação
Critérios de elegibilidade
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
- Adulto mais velho
Aceita Voluntários Saudáveis
Descrição
Inclusion Criteria:
- At least 18 years of age.
- Able to understand the nature of the task.
- Able to provide informed consent themselves or provide consent through their legally authorized representative.
- Undergoing clinically indicated intracranial electrode implantation with coverage of at least one fear-related brain region, including the amygdala, hippocampus, cingulate cortex, insula, or prefrontal cortex.
Exclusion Criteria:
- Under the age of 18.
- Unable to understand the nature of the task.
- Unable to provide informed consent themselves or provide consent through their legally authorized representative.
- No clinically indicated intracranial electrode coverage in any fear-related brain region, including the amygdala, hippocampus, cingulate cortex, insula, or prefrontal cortex
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: N / D
- Modelo Intervencional: Atribuição de grupo único
- Mascaramento: Nenhum (rótulo aberto)
Número de braços
Armas e Intervenções
Grupo de Participantes / BraçoGrupo de Participantes / Braço |
Intervenção / TratamentoIntervenção / Tratamento |
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Experimental: Amygdala-prefrontal in Fear Extinction
Participants will undergo direct intracranial electrical stimulation and complete a Pavlovian fear conditioning and extinction task while neural activity is recorded through clinically implanted stereoelectroencephalography (SEEG) electrodes.
Electrical stimulation, including single-pulse and/or high-frequency stimulation, will be delivered through the intracranial electrodes to investigate amygdala-prefrontal circuit dynamics.
Participants may also receive theta-burst stimulation of the amygdala during extinction learning.
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During a resting state and extinction learning phase, participants will receive electrical stimulation (single-pulse and/or high-frequency stimulation) through the intracranial electrodes while recording local field potentials from the neural networks.
Direct electrical stimulation will be accomplished using FDA-approved equipment and stimulation protocols that are consistent with those used routinely for clinical purposes.
Participants will be involved in a Pavlovian fear conditioning/extinction experiment while recording local field potential signals from the neural networks.
During the experiment, neutral stimuli will be paired with an aversive but not painful electric shock (via the surface skin of the hand/foot) or screeching sound.
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O que o estudo está medindo?
Medidas de resultados primários
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
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Broadband high-frequency power (70-170 Hz) in amygdala-prefrontal circuits
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Broadband high-frequency power (70-170 Hz) will be quantified from local field potentials recorded through clinically implanted stereoelectroencephalography (SEEG) electrodes in the amygdala and prefrontal cortex.
Broadband high-frequency power will be assessed during fear processing and during intracranial electrical stimulation to characterize local neural activity within amygdala-prefrontal circuits.
For stimulation recordings, stimulation artifacts will be removed using appropriate artifact-removal methods, for example, MPARRM (matching pursuit-based artifact reconstruction and removal method) for single-pulse stimulation and LIBRA (linear baseline-integrated removal of artifacts) for high-frequency stimulation.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Oscillatory power at the stimulation frequency during intracranial electrical stimulation
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Oscillatory power at the stimulation frequency will be quantified from local field potentials recorded through clinically implanted stereoelectroencephalography (SEEG) electrodes in the amygdala and prefrontal cortex.
Power at the stimulation frequency will be assessed during intracranial electrical stimulation to quantify stimulation-induced oscillatory entrainment within amygdala-prefrontal circuits.
For theta-burst stimulation, theta-band activity (4-8 Hz) will be assessed.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Amplitude of cortico-cortical evoked potentials in amygdala-prefrontal circuits
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Cortico-cortical evoked potential (CCEP) amplitude will be quantified from local field potentials recorded through clinically implanted stereoelectroencephalography (SEEG) electrodes following single-pulse intracranial electrical stimulation.
CCEP amplitude will be used to assess effective connectivity between the amygdala and prefrontal cortex.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Theta/gamma band power in amygdala-prefrontal circuits
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Theta (4-8 Hz) and gamma (30-50 Hz) band power will be quantified from local field potentials recorded through clinically implanted stereoelectroencephalography (SEEG) electrodes in the amygdala and prefrontal cortex.
Theta/gamma-band power will be assessed during fear conditioning and extinction to characterize oscillatory neural activity within amygdala-prefrontal circuits.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Cross-frequency coupling in amygdala-prefrontal circuits
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Cross-frequency coupling will be quantified from local field potentials recorded through clinically implanted stereoelectroencephalography (SEEG) electrodes in the amygdala and prefrontal cortex.
Coupling between neural activity across different frequency bands, including phase-amplitude coupling between lower-frequency oscillations and high-frequency activity, will be assessed during resting state and fear processing to characterize cross-frequency neural interactions within amygdala-prefrontal circuits.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Skin conductance response amplitude during fear conditioning and extinction
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Skin conductance response (SCR) amplitude will be quantified during fear conditioning and extinction to assess autonomic responses to conditioned stimuli.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Pupil diameter during fear conditioning and extinction
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Pupil diameter will be quantified from eye-tracking recordings during fear conditioning and extinction to assess autonomic responses to conditioned stimuli.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Button press reaction time during fear conditioning and extinction
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Button press reaction time will be quantified during fear conditioning and extinction to assess behavioral responses to conditioned stimuli.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Subjective unpleasantness rating during fear conditioning and extinction
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Participants will rate the unpleasantness of the conditioned stimuli during fear conditioning and extinction.
Ratings will be used to quantify subjective emotional responses to the conditioned stimuli.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Medidas de resultados secundários
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Heart rate during fear conditioning and extinction
Prazo: During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Heart rate will be quantified during fear conditioning and extinction to assess autonomic responses to conditioned stimuli.
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During research sessions, up to 2 hours per day for up to 4 days during the participant's hospital stay.
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Investigadores
Investigadores
- Investigador principal: Tao Xie, PhD, Washington University School of Medicine
Publicações e links úteis
Publicações Gerais
- Xie T, Foutz TJ, Adamek M, Swift JR, Inman CS, Manns JR, Leuthardt EC, Willie JT, Brunner P. Single-pulse electrical stimulation artifact removal using the novel matching pursuit-based artifact reconstruction and removal method (MPARRM). J Neural Eng. 2023 Dec 27;20(6):066036. doi: 10.1088/1741-2552/ad1385.
- Xie T, van Rooij SJH, Inman CS, Wang S, Brunner P, Willie JT. The case for hemispheric lateralization of the human amygdala in fear processing. Mol Psychiatry. 2025 May;30(5):2252-2259. doi: 10.1038/s41380-025-02940-2. Epub 2025 Feb 27.
- Xie T, van Rooij SJH, Sun S, Bryson NK, Demarest P, Park H, Maccotta L, Wang S, Brunner P, Willie JT. Right amygdala ablation reduces maladaptive negative interpretation bias and symptoms in a patient with post-traumatic stress disorder. Nat Commun. 2026 Jun 22;17(1):7868. doi: 10.1038/s41467-026-74099-5.
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Última atualização enviada que atendeu aos critérios de controle de qualidade
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Mais Informações
Termos relacionados a este estudo
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Outros números de identificação do estudo
Outros números de identificação do estudo
- 202507143
- K99MH144521 (Concessão/Contrato do NIH dos EUA)
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