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Université de Fribourg

A biologically-inspired model to predict perceived visual speed as a function of the stimulated portion of the visual field

Solari, Fabio ; Caramenti, Martina ; Chessa, Manuela ; Pretto, Paolo ; Bülthoff, Heinrich H. ; Bresciani, Jean-Pierre

In: Frontiers in Neural Circuits, 2019, vol. 13, p. -

Spatial orientation relies on a representation of the position and orientation of the body relative to the surrounding environment. When navigating in the environment, this representation must be constantly updated taking into account the direction, speed, and amplitude of body motion. Visual information plays an important role in this updating process, notably via optical flow. Here, we...

Université de Fribourg

Regular physical activity modulates perceived visual speed when running in treadmill-mediated virtual environments

Caramenti, Martina ; Lafortuna, Claudio L. ; Mugellini, Elena ; Khaled, Omar Abou ; Bresciani, Jean-Pierre ; Dubois, Amandine

In: PLOS ONE, 2019, vol. 14, no. 6, p. e0219017

In virtual reality, visual speed is usually underestimated relative to locomotor speed. Here we investigated how physical activity and fitness affect perceived visual speed when running in a treadmill-mediated virtual environment. Thirty healthy participants (ten sedentary individuals, ten team sport players and ten expert runners) ran on a treadmill at two different speeds (8, 12km/h) in...

Université de Fribourg

Multimodal communication in aphasia: perception and production of co-speech gestures during face-to-face conversation

Preisig, Basil C. ; Eggenberger, Noëmi ; Cazzoli, Dario ; Nyffeler, Thomas ; Gutbrod, Klemens ; Annoni, Jean-Marie ; Meichtry, Jurka R. ; Nef, Tobias ; Müri, René M.

In: Frontiers in Human Neuroscience, 2018, vol. 12, p. -

The role of nonverbal communication in patients with post-stroke language impairment (aphasia) is not yet fully understood. This study investigated how aphasic patients perceive and produce co-speech gestures during face-to-face interaction, and whether distinct brain lesions would predict the frequency of spontaneous co-speech gesturing. For this purpose, we recorded samples of conversations...

Université de Fribourg

Distinct frequency specialization for detecting dark transients in humans and tree shrews

Khani, Abbas ; Mustafar, Faiz ; Rainer, Gregor

In: Cell Reports, 2018, vol. 23, no. 8, p. 2405–2415

Despite well-known privileged perception of dark over light stimuli, it is unknown to what extent this dark dominance is maintained when visual transients occur in rapid succession, for example, during perception of moving stimuli. Here, we address this question using dark and light transients presented at different flicker frequencies. Although both human participants and tree shrews...

Consortium of Swiss Academic Libraries

Visual exploration pattern in hemineglect

Müri, René ; Cazzoli, D. ; Nyffeler, T. ; Pflugshaupt, T.

In: Psychological Research, 2009, vol. 73, no. 2, p. 147-157

Consortium of Swiss Academic Libraries

Saliency modulates global perception in simultanagnosia

Huberle, Elisabeth ; Karnath, Hans-Otto

In: Experimental Brain Research, 2010, vol. 204, no. 4, p. 595-603

Consortium of Swiss Academic Libraries

Face Perception in the Mind's Eye

Righart, Ruthger ; Burra, Nicolas ; Vuilleumier, Patrik

In: Brain Topography, 2011, vol. 24, no. 1, p. 9-18