Empreu aquest identificador per citar o enllaçar aquest ítem:
http://hdl.handle.net/10609/92920
Títol: | Visual contrast sensitivity improvement by right frontal high-beta activity is mediated by contrast gain mechanisms and influenced by fronto-parietal white matter microstructure |
Autoria: | Quentin, Romain Elkin Frankston, Seth Vernet, Marine Toba, Monica N. Bartolomeo, Paolo Chanes, Lorena Valero-Cabré, Antoni |
Altres: | Universitat Oberta de Catalunya (UOC) Boston University School of Medicine Università Cattolica del Sacro Cuore Institut du Cerveau |
Citació: | Quentin, R., Elkin Frankston, S., Vernet, M., Toba, M.N., Bartolomeo, P., Chanes, L. & Valero-Cabré, A. (2016). Visual contrast sensitivity improvement by right frontal high-beta activity is mediated by contrast gain mechanisms and influenced by fronto-parietal white matter microstructure. Cerebral Cortex, 26(6), 2381-2390. doi: 10.1093/cercor/bhv060 |
Resum: | Behavioral and electrophysiological studies in humans and non-human primates have correlated frontal high-beta activity with the orienting of endogenous attention and shown the ability of the latter function to modulate visual performance. We here combined rhythmic transcranial magnetic stimulation (TMS) and diffusion imaging to study the relation between frontal oscillatory activity and visual performance, and we associated these phenomena to a specific set of white matter pathways that in humans subtend attentional processes. High-beta rhythmic activity on the right frontal eye field (FEF) was induced with TMS and its causal effects on a contrast sensitivity function were recorded to explore its ability to improve visual detection performance across different stimulus contrast levels. Our results show that frequency-specific activity patterns engaged in the right FEF have the ability to induce a leftward shift of the psychometric function. This increase in visual performance across different levels of stimulus contrast is likely mediated by a contrast gain mechanism. Interestingly, microstructural measures of white matter connectivity suggest a strong implication of right fronto-parietal connectivity linking the FEF and the intraparietal sulcus in propagating high-beta rhythmic signals across brain networks and subtending top-down frontal influences on visual performance. |
Paraules clau: | cervell connectivitat front-parietal neurostimulació no invasiva oscil·lació fascicul longitudinal superior sincronització percepció visual atenció visuo-espacial anatomia de la matèria blanca |
DOI: | 10.1093/cercor/bhv060 |
Tipus de document: | info:eu-repo/semantics/article |
Versió del document: | info:eu-repo/semantics/publishedVersion |
Data de publicació: | 21-abr-2015 |
Apareix a les col·leccions: | Articles Articles cientÍfics |
Arxius per aquest ítem:
Arxiu | Descripció | Mida | Format | |
---|---|---|---|---|
visualcontrast.pdf | 647,61 kB | Adobe PDF | Veure/Obrir |
Comparteix:
Els ítems del Repositori es troben protegits per copyright, amb tots els drets reservats, sempre i quan no s’indiqui el contrari.