 |
|
|
|
| HAL : hal-00450733, version 1 |
| DOI : 10.1109/ISBI.2010.5490124 |
| Fiche détaillée |  Récupérer au format |
|
|
| IEEE International Symposium on Biomedical Imaging (ISBI) 2010, Rotterdam : Netherlands (2010) |
|
|
|
|
| Separation of Traveling Waves in Cortical Networks Using Optical Imaging |
|
|
Nicolas Schmidt 1Gabriel Peyré 1 |
|
|
| (04/2010) |
|
|
|
| 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. |
|
|
|
|
|
|
|
|
|
|
|
| 1 : | CEntre de REcherches en MAthématiques de la DEcision (CEREMADE) |
|
|
|
CNRS : UMR7534 – Université Paris IX - Paris Dauphine |
|
|
| 2 : | Institut de Neurobiologie Alfred Fessard (INAF) |
|
|
|
CNRS : FRC2118 |
|
|
| 3 : | Unité de neurosciences intégratives et computationnelles (UNIC) |
|
|
|
CNRS : UPR2191 |
|
|
| 4 : | Karolinska Institutet |
|
|
|
Karolinska Institutet |
|
|
|
|
|
|
|
|
|
| Domaine | : | Informatique/Imagerie médicale Informatique/Traitement du signal et de l'image Mathématiques/Equations aux dérivées partielles Sciences du Vivant/Neurosciences/Neurobiologie Sciences de l'ingénieur/Traitement du signal et de l'image |
|
|
| Optical imaging – Inverse problems – Propagation – Partial differential equations – Signal reconstruction |
|
|
|
| Liste des fichiers attachés à ce document : | |||||
|
|||||
|
|
|
| hal-00450733, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00450733 | |
| oai:hal.archives-ouvertes.fr:hal-00450733 | |
| Contributeur : Gabriel Peyré | |
| Soumis le : Mardi 26 Janvier 2010, 20:07:47 | |
| Dernière modification le : Dimanche 2 Janvier 2011, 15:58:00 | |
