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  Infrared oculography-validation of a new method to monitor startle eyeblink amplitudes during fMRI

Anders, S., Weiskopf, N., Lule, D., & Birbaumer, N. (2004). Infrared oculography-validation of a new method to monitor startle eyeblink amplitudes during fMRI. NeuroImage, 22(2), 767-770. doi:10.1016/j.neuroimage.2004.01.024.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-6610-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-CD37-C
Genre: Journal Article

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 Creators:
Anders, Silke1, 2, 3, Author
Weiskopf, Nikolaus1, 3, Author              
Lule, Dorothee1, 4, Author
Birbaumer, Niels1, 5, Author
Affiliations:
1Institute of Medical Psychology and Behavioral Neurobiology, Eberhard Karls University Tübingen, Germany, ou_persistent22              
2Department of Neurology, Eberhard Karls University Tübingen, Germany, ou_persistent22              
3Section of Experimental MR of the CNS, Department of Radiology, Eberhard Karls University Tübingen, Germany, ou_persistent22              
4Department of Neurology, Ulm University, Germany, ou_persistent22              
5Center for Mind/Brain Sciences, University of Trento, Italy, ou_persistent22              

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Free keywords: Startle eyeblink; fMRI; Infrared oculography; Affective state
 Abstract: Amplitude modulation of the eyeblink component of the startle response is a commonly used index for the emotional state of an organism. The use of electromyography (EMG) to determine startle eyeblink amplitudes during functional magnetic resonance imaging (fMRI) is limited as interactions between strong switching magnetic fields, radio pulses and electrodes introduce large artefacts in EMG recordings. We demonstrate a robust linear correlation between time courses and amplitudes of startle eyeblinks recorded by EMG and infrared oculography (IOG), an fMRI compatible technique based on infrared light reflection from the subject's eye. Moreover, our data indicate that IOG, like EMG, recordings of startle eyeblink amplitudes are predicted by verbal ratings of the emotional valence of pictorial foreground stimuli. Thus, IOG provides a valid method to record startle eyeblinks and might be used to monitor affective state during fMRI.

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Language(s): eng - English
 Dates: 2004-04-172004-06-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.neuroimage.2004.01.024
 Degree: -

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Title: NeuroImage
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 22 (2) Sequence Number: - Start / End Page: 767 - 770 Identifier: ISSN: 1053-8119
CoNE: https://pure.mpg.de/cone/journals/resource/954922650166