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Infrared oculography-validation of a new method to monitor startle eyeblink amplitudes during fMRI.
Neuroimage. 2004 Jun; 22(2):767-70.N

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.

Authors+Show Affiliations

Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Germany. silke.anders@med.uni-tuebingen.deNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15193605

Citation

Anders, Silke, et al. "Infrared Oculography-validation of a New Method to Monitor Startle Eyeblink Amplitudes During FMRI." NeuroImage, vol. 22, no. 2, 2004, pp. 767-70.
Anders S, Weiskopf N, Lule D, et al. Infrared oculography-validation of a new method to monitor startle eyeblink amplitudes during fMRI. Neuroimage. 2004;22(2):767-70.
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), 767-70.
Anders S, et al. Infrared Oculography-validation of a New Method to Monitor Startle Eyeblink Amplitudes During FMRI. Neuroimage. 2004;22(2):767-70. PubMed PMID: 15193605.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Infrared oculography-validation of a new method to monitor startle eyeblink amplitudes during fMRI. AU - Anders,Silke, AU - Weiskopf,Nikolaus, AU - Lule,Dorothee, AU - Birbaumer,Niels, PY - 2003/09/30/received PY - 2004/01/12/revised PY - 2004/01/15/accepted PY - 2004/6/15/pubmed PY - 2004/8/20/medline PY - 2004/6/15/entrez SP - 767 EP - 70 JF - NeuroImage JO - Neuroimage VL - 22 IS - 2 N2 - 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. SN - 1053-8119 UR - https://www.unboundmedicine.com/medline/citation/15193605/Infrared_oculography_validation_of_a_new_method_to_monitor_startle_eyeblink_amplitudes_during_fMRI_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1053811904000461 DB - PRIME DP - Unbound Medicine ER -