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  Epidural fNIRS as a tool for studying local hemodynamic signals and neuro-vascular coupling

Zaidi, A. D., Munk, M., Sitaram, R., Birbaumer, N., & Fetz, E. (2014). Epidural fNIRS as a tool for studying local hemodynamic signals and neuro-vascular coupling. In 15th Conference of Junior Neuroscientists of Tübingen (NeNa 2014): The Changing Face of Publishing and Scientific Evaluation (pp. 18-18).

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-3354-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-3484-F
Genre: Meeting Abstract

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 Creators:
Zaidi, Ali D1, 2, Author              
Munk, MHJ1, 2, Author              
Sitaram, Ranganatha1, 2, Author              
Birbaumer, N, Author
Fetz, E, Author
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1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: Hemodynamic activity is studied using functional Magnetic Resonance Imaging (fMRI), Intrinsic Signal Optical Imaging (ISOI), and functional Near Infrared Spectroscopy (fNIRS). FNIRS is a non-invasive neuroimaging method that uses a near-infrared light source and detector pair (optode pair), to measure changes in concentrations of oxy-hemoglobin (HbO), deoxy-hemoglobin (HbR) and total hemoglobin (HbT), in a small volume of tissue. The advantages of fNIRS include its portability, metabolic specificity, high temporal resolution, high sensitivity in detecting small substance concentrations, affordability, and low susceptibility to movement artefacts. Given these advantages, fNIRS is a good candidate for use in primates, specifically to measure local hemodynamic signals during electrophysiological measurements. To test the feasibility of using epidural fNIRS with concomitant extracellular electrophysiology, we recorded spontaneous and stimulus induced activity from the primary visual cortex in two anesthetized monkeys. To study the relationship between changes in [HbO] and [HbR], and the underlying neuronal activity, we used system identification techniques. Briefly, our results show that epidural fNIRS has much higher SNR than fMRI, and is a promising tool for studying local hemodynamic signals and neuro-vascular coupling.

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 Dates: 2014-10
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: ZaidiMSBF2014
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Title: 15th Conference of Junior Neuroscientists of Tübingen (NeNa 2014): The Changing Face of Publishing and Scientific Evaluation
Place of Event: Schramberg, Germany
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Title: 15th Conference of Junior Neuroscientists of Tübingen (NeNa 2014): The Changing Face of Publishing and Scientific Evaluation
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 18 - 18 Identifier: -