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Université de Fribourg

Contributions of pitch and bandwidth to sound-induced enhancement of visual cortex excitability in humans

Spierer, Lucas ; Manuel, Aurelie L. ; Bueti, Domenica ; Murray, Micah M.

In: Cortex, 2014, vol. 49, no. 10, p. 2728–2734

Multisensory interactions have been documented within low-level, even primary, cortices and at early post-stimulus latencies. These effects are in turn linked to behavioral and perceptual modulations. In humans, visual cortex excitability, as measured by transcranial magnetic stimulation (TMS) induced phosphenes, can be reliably enhanced by the co-presentation of sounds. This enhancement occurs...

Université de Fribourg

Plastic modifications within inhibitory control networks induced by practicing a stop-signal task: an electrical neuroimaging study

Manuel, Aurelie L. ; Bernasconi, Fosco ; Spierer, Lucas

In: Cortex, 2012, p. -

Inhibitory control refers to our ability to suppress ongoing motor, affective or cognitive processes and mostly depends on a fronto–basal brain network. Inhibitory control deficits participate in the emergence of several prominent psychiatric conditions, including attention deficit/hyperactivity disorder or addiction. The rehabilitation of these pathologies might therefore benefit from...

Université de Fribourg

Noise in brain activity engenders perception and influences discrimination sensitivity

Bernasconi, Fosco ; De Lucia, Marzia ; Tzovara, Athina ; Manuel, Aurelie L. ; Murray, Micah M. ; Spierer, Lucas

In: The Journal of Neuroscience, 2011, vol. 31, no. 49, p. 17971-17981

Behavioral and brain responses to identical stimuli can vary with experimental and task parameters, including the context of stimulus presentation or attention. More surprisingly, computational models suggest that noise-related random fluctuations in brain responses to stimuli would alone be sufficient to engender perceptual differences between physically identical stimuli. In two experiments...