Niessing, Jörn ; Ebisch, Boris ; Schmidt, Kerstin E. ; Niessing, Michael ; Singer, Wolf ; Galuske, Ralf A. W. (2005)
Hemodynamic signals correlate tightly with synchronized gamma oscillations.
In: Science (New York, N.Y.), 309 (5736)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Functional imaging methods monitor neural activity by measuring hemodynamic signals. These are more closely related to local field potentials (LFPs) than to action potentials. We simultaneously recorded electrical and hemodynamic responses in the cat visual cortex. Increasing stimulus strength enhanced spiking activity, high-frequency LFP oscillations, and hemodynamic responses. With constant stimulus intensity, the hemodynamic response fluctuated; these fluctuations were only loosely related to action potential frequency but tightly correlated to the power of LFP oscillations in the gamma range. These oscillations increase with the synchrony of synaptic events, which suggests a close correlation between hemodynamic responses and neuronal synchronization.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2005 |
| Autor(en): | Niessing, Jörn ; Ebisch, Boris ; Schmidt, Kerstin E. ; Niessing, Michael ; Singer, Wolf ; Galuske, Ralf A. W. |
| Art des Eintrags: | Bibliographie |
| Titel: | Hemodynamic signals correlate tightly with synchronized gamma oscillations. |
| Sprache: | Englisch |
| Publikationsjahr: | 2005 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Science (New York, N.Y.) |
| Jahrgang/Volume einer Zeitschrift: | 309 |
| (Heft-)Nummer: | 5736 |
| Kurzbeschreibung (Abstract): | Functional imaging methods monitor neural activity by measuring hemodynamic signals. These are more closely related to local field potentials (LFPs) than to action potentials. We simultaneously recorded electrical and hemodynamic responses in the cat visual cortex. Increasing stimulus strength enhanced spiking activity, high-frequency LFP oscillations, and hemodynamic responses. With constant stimulus intensity, the hemodynamic response fluctuated; these fluctuations were only loosely related to action potential frequency but tightly correlated to the power of LFP oscillations in the gamma range. These oscillations increase with the synchrony of synaptic events, which suggests a close correlation between hemodynamic responses and neuronal synchronization. |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie > Systemische Neurophysiologie ?? fb10_zoologie ?? 10 Fachbereich Biologie |
| Hinterlegungsdatum: | 21 Feb 2012 13:32 |
| Letzte Änderung: | 05 Mär 2013 09:58 |
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