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research article

A 7 tesla FMRI study of amygdala responses to fearful faces

van der Zwaag, Wietske  
•
Costa, Da  
•
Sandra, E.
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2012
Brain topography

The amygdalae are involved in the perception of emotions such as happiness, anger and fear. Because of their proximity to the sinuses, the image signal intensity in T2* weighted fMRI data is often affected by signal loss due to through-slice dephasing, especially at high field strength. In this study, the feasibility of fMRI in the amygdalae at 7 Tesla was investigated. A paradigm based on the presentation of fearful faces was used for stimulation. Previously, opposite effects have been found for presentation of averted and direct gaze fearful faces. Here, we show that (1) sufficiently high temporal SNR values are reached in the amygdalae for detection of small BOLD signal changes and (2) that the BOLD signal in the amygdalae for presentation of a direct or averted gaze in a fearful face depends on stimulus duration.

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Type
research article
DOI
10.1007/s10548-012-0219-0
Web of Science ID

WOS:000301297100001

Author(s)
van der Zwaag, Wietske  
Costa, Da  
Sandra, E.
Zürcher, Nicole R.
Adams, Reginald B.
Hadjikhani, Nouchine  
Date Issued

2012

Published in
Brain topography
Volume

25

Issue

2

Start page

125

End page

8

Subjects

CIBM-AIT

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CIBM  
GRHAD  
LIFMET  
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/81253
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