Separation of traveling waves in cortical networks using optical imaging
Schmidt, Nicolas; Peyré, Gabriel; Fregnac, Yves; Roland, Per (2010), Separation of traveling waves in cortical networks using optical imaging, 2010 7th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, IEEE : Piscataway, NJ, p. 868-871. 10.1109/ISBI.2010.5490124
Type
Communication / ConférenceExternal document link
https://hal.archives-ouvertes.fr/hal-00450733Date
2010Conference title
7th IEEE International Symposium on Biomedical Imaging: From Nano to MacroConference date
2010-04Conference city
RotterdamConference country
NetherlandsBook title
2010 7th IEEE International Symposium on Biomedical Imaging: From Nano to MacroPublisher
IEEE
Published in
Piscataway, NJ
ISBN
978-1-4244-4125-9
Pages
868-871
Publication identifier
Metadata
Show full item recordAbstract (EN)
This paper introduces a mathematical model of the spatio-temporal patterns of visually evoked activity observed using Voltage-Sensitive Dye Imaging (VSDI) of the visual cortex. The cortical activity is described using a linear superposition of waves traveling with different speeds. This model improves the quality of the wave detection and still respects the previous approaches, as it integrates several biologically plausible constraints: 1) separability of the sources in terms of cortical location; 2) separability of the waves in terms of propagation speed, and 3) additivity of the depolarizing effects of the waves. Under these assumptions, a traveling component analysis algorithm performs a full separation of the set of waves and recovers the locations of the neural sources. Both features could help to better understand the dynamics of evoked activity in cortical sensory networks.Subjects / Keywords
Signal reconstruction; Optical imaging; Inverse problems; Propagation; Partial differential equationsRelated items
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