Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert.

Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert. Research Abstract Details 

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Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert. Abstract Text:

Mohammed R Milad,Christopher I Wright,Scott P Orr,Roger K Pitman,Gregory J Quirk,Scott L Rauch,

BACKGROUND: Extinction of conditioned fear is thought to form a new safety memory that is expressed in the context in which the extinction learning took place. Rodent studies implicate the ventromedial prefrontal cortex (vmPFC) and hippocampus in extinction recall and its modulation by context, respectively. The aim of the present study is to investigate the mediating anatomy of extinction recall in healthy humans. METHODS: We used event-related functional magnetic resonance imaging (fMRI) and a 2-day fear conditioning and extinction protocol with skin conductance response as the index of conditioned responses. RESULTS: During extinction recall, we found significant activations in vmPFC and hippocampus in response to the extinguished versus an unextinguished stimulus. Activation in these brain regions was positively correlated with the magnitude of extinction memory. Functional connectivity analysis revealed significant positive correlation between vmPFC and hippocampal activation during extinction recall. CONCLUSIONS: These results support the involvement of the human hippocampus as well as vmPFC in the recall of extinction memory. Furthermore, this provides a paradigm for future investigations of fronto-temporal function during extinction recall in psychiatric disorders such as posttraumatic stress disorder.

Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert. Publishing Authors By Initials

MR Milad,CI Wright,SP Orr,RK Pitman,GJ Quirk,SL Rauch,

For similar behavioral disciplines and activities: behavioral sciences: psychophysics research abstracts see: behavioral disciplines and activities: behavioral sciences: psychophysics research

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Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Biological psychiatry

VOLUME: 62

Page Numbers: 446-54

Journal Abbreviation: Biol. Psychiatry

ISSN: 0006-3223

DAY: 9

MONTH: 01

YEAR: 2007

Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert. Information

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LANGUAGE: eng

NlmUniqueID: 213264

Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert. Keywords Mesh Terms:

KEYWORDS: Psychophysics

MESH TERMS: physiology

Chemical & Substance for Abstract: Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert. Information

Substance Name: Oxygen

Registry Number: 7782-44-7

Grant and Affiliation Information for Recall of fear extinction in humans activates the ventromedial prefrontal cortex and hippocampus in concert.

AFFILIATION: Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts 02129, USA.

Country: United States

AGENCY: United States NIMH

GRANT: 1R21MH072156-1

ACRONYM: MH

MEDLINETA: Biol Psychiatry

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