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Impact of cerebral damage on spatial attention

The main research interest of our group is to analyse cognitive processes that enable humans to build a coherent representation of space, to describe the impact of cerebral damage on spatial attention, and to develop treatment strategies for deficits of visual-spatial attention. We are studying the functional characteristics of spatial neglect, spatial extinction, and optic ataxia that are common consequences of parietal brain damage. The techniques used to study these phenomena involve measures of reaction time, eye movements, or 3D-motion analysis.

Group's publications

Variability of behavioural responses to transcranial magnetic stimulation: Origins and predictors.
NEUROPSYCHOLOGIA
2015 vol. pp. 40-48
NICOLO P, PTAK R, GUGGISBERG A

Two Intrinsic Coupling Types for Resting-State Integration in the Human Brain.
BRAIN TOPOGRAPHY
2014 vol. pp. 0-
GUGGISBERG A, RIZK S, PTAK R, DI PIETRO M, SAJ A, LAZEYRAS F, LOVBLAD KO, SCHNIDER A, PIGNAT JM

Task relevance effects in electrophysiological brain activity: early, but not first.
NEUROIMAGE
2014 vol. 101 pp. 68-75
FELLRATH J, MANUEL A, PTAK R

Visual object agnosia is associated with a breakdown of object-selective responses in the lateral occipital cortex.
NEUROPSYCHOLOGIA
2014 vol. 60 pp. 10-20
PTAK R, LAZEYRAS F, DI PIETRO M, SCHNIDER A, SIMON SR

Network mechanisms of responsiveness to continuous theta-burst stimulation.
EUROPEAN JOURNAL OF NEUROSCIENCE
2013 vol. 38(8) pp. 3230-3238
RIZK S, PTAK R, NYFFELER T, SCHNIDER A, GUGGISBERG A

The parietal cortex and saccade planning: lessons from human lesion studies.
FRONTIERS IN HUMAN NEUROSCIENCE
2013 vol. 7 pp. 254-
PTAK R, MURI R

Spatial neglect and the neural coding of attentional priority.
NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS
2013 vol. 37(4) pp. 705-722
PTAK R, FELLRATH J

The behavioral significance of coherent resting-state oscillations after stroke.
NEUROIMAGE
2012 vol. 61(1) pp. 249-257
DUBOVIK S AND AL.

The frontoparietal attention network of the human brain: action, saliency, and a priority map of the environment.
THE NEUROSCIENTIST : A REVIEW JOURNAL BRINGING NEUROBIOLOGY, NEUROLOGY AND PSYCHIATRY
2012 vol. 18(5) pp. 502-515
PTAK R

Early event-related cortical activity originating in the frontal eye fields and inferior parietal lobe predicts the occurrence of correct and error saccades.
HUMAN BRAIN MAPPING
2011 vol. 32(3) pp. 358-369
PTAK R, CAMEN C, MORAND S, SCHNIDER A

The dorsal attention network mediates orienting toward behaviorally relevant stimuli in spatial neglect.
JOURNAL OF NEUROSCIENCE
2010 vol. 30(38) pp. 12557-12565
PTAK R, SCHNIDER A

Disorientation Confabulation and Extinction Capacity: Clues on How the Brain Creates Reality
BIOLOGICAL PSYCHIATRY
2009 vol. 65(11) pp. 966-972
NAHUM L, PTAK R, LEEMANN B, SCHNIDER A

Looking left with left neglect: The role of spatial-attention when active vision selects local image features for fixation
CORTEX
2009 vol. 45(10) pp. 1156-1166
PTAK R, GOLAY L, MURI R, SCHNIDER A

Cortical and subcortical anatomy of chronic spatial neglect following vascular damage.
BEHAVIORAL AND BRAIN FUNCTIONS
2008 vol. 4 pp. 43-
GOLAY L, SCHNIDER A, PTAK R

A non-spatial bias favouring fixated stimuli revealed in patients with spatial neglect
BRAIN
2007 vol. 130 pp. 3211-3222
PTAK R, SCHNIDER A, GOLAY L, MURI R

Reflexive orienting in spatial neglect is biased towards behaviourally salient stimuli
CEREBRAL CORTEX
2006 vol. 16(3) pp. 337-345
PTAK R, SCHNIDER A

Decision-making in amnesia: do advantageous decisions require conscious knowledge of previous behavioural choices?
NEUROPSYCHOLOGIA
2006 vol. 44(8) pp. 1315-1324
GUTBROD K, KROUZEL C, HOFER H, MÜRI R, PERRIG W, PTAK R

The inferior temporal lobe mediates distracter-resistant visual search of patients with spatial neglect
JOURNAL OF COGNITIVE NEUROSCIENCE
2005 vol. 17 pp. 788-799
PTAK RADEK, VALENZA NATHALIE

Dissociated active and passive tactile shape recognition : a case study of pure tactile apraxia
BRAIN
2001 vol. 124 (Pt 11) pp. 2287-2298
VALENZA N, PTAK R, ZIMINE I, BADEN M, LAZEYRAS F, SCHNIDER A

Research's domains

NEUROPSYCHOLOGY AND COGNITIVES NEUROSCIENCES




DATABASE-RESEARCH	GROUP OF CLINICAL PATIENT RESEARCH

Radek PTAK	Head of group CV	Research subject	Members of the group


	Links about the group Dr. R. PTAK Hôpital de Beau-Séjour Service de Neurorééducation 26, av. de Beau-Séjour 1211 Genève 14 Suisse radek.ptak@hcuge.ch Tel.: + 41 22 372 35 24 Fax: + 41 22 372 83 38 Comments Pages updated the 17.11.2015		Reseach's subject \| Group's publications \| Research's domains Impact of cerebral damage on spatial attention The main research interest of our group is to analyse cognitive processes that enable humans to build a coherent representation of space, to describe the impact of cerebral damage on spatial attention, and to develop treatment strategies for deficits of visual-spatial attention. We are studying the functional characteristics of spatial neglect, spatial extinction, and optic ataxia that are common consequences of parietal brain damage. The techniques used to study these phenomena involve measures of reaction time, eye movements, or 3D-motion analysis. Group's publications Variability of behavioural responses to transcranial magnetic stimulation: Origins and predictors. NEUROPSYCHOLOGIA 2015 vol. pp. 40-48 NICOLO P, PTAK R, GUGGISBERG A Two Intrinsic Coupling Types for Resting-State Integration in the Human Brain. BRAIN TOPOGRAPHY 2014 vol. pp. 0- GUGGISBERG A, RIZK S, PTAK R, DI PIETRO M, SAJ A, LAZEYRAS F, LOVBLAD KO, SCHNIDER A, PIGNAT JM Task relevance effects in electrophysiological brain activity: early, but not first. NEUROIMAGE 2014 vol. 101 pp. 68-75 FELLRATH J, MANUEL A, PTAK R Visual object agnosia is associated with a breakdown of object-selective responses in the lateral occipital cortex. NEUROPSYCHOLOGIA 2014 vol. 60 pp. 10-20 PTAK R, LAZEYRAS F, DI PIETRO M, SCHNIDER A, SIMON SR Network mechanisms of responsiveness to continuous theta-burst stimulation. EUROPEAN JOURNAL OF NEUROSCIENCE 2013 vol. 38(8) pp. 3230-3238 RIZK S, PTAK R, NYFFELER T, SCHNIDER A, GUGGISBERG A The parietal cortex and saccade planning: lessons from human lesion studies. FRONTIERS IN HUMAN NEUROSCIENCE 2013 vol. 7 pp. 254- PTAK R, MURI R Spatial neglect and the neural coding of attentional priority. NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS 2013 vol. 37(4) pp. 705-722 PTAK R, FELLRATH J The behavioral significance of coherent resting-state oscillations after stroke. NEUROIMAGE 2012 vol. 61(1) pp. 249-257 DUBOVIK S AND AL. The frontoparietal attention network of the human brain: action, saliency, and a priority map of the environment. THE NEUROSCIENTIST : A REVIEW JOURNAL BRINGING NEUROBIOLOGY, NEUROLOGY AND PSYCHIATRY 2012 vol. 18(5) pp. 502-515 PTAK R Early event-related cortical activity originating in the frontal eye fields and inferior parietal lobe predicts the occurrence of correct and error saccades. HUMAN BRAIN MAPPING 2011 vol. 32(3) pp. 358-369 PTAK R, CAMEN C, MORAND S, SCHNIDER A The dorsal attention network mediates orienting toward behaviorally relevant stimuli in spatial neglect. JOURNAL OF NEUROSCIENCE 2010 vol. 30(38) pp. 12557-12565 PTAK R, SCHNIDER A Disorientation Confabulation and Extinction Capacity: Clues on How the Brain Creates Reality BIOLOGICAL PSYCHIATRY 2009 vol. 65(11) pp. 966-972 NAHUM L, PTAK R, LEEMANN B, SCHNIDER A Looking left with left neglect: The role of spatial-attention when active vision selects local image features for fixation CORTEX 2009 vol. 45(10) pp. 1156-1166 PTAK R, GOLAY L, MURI R, SCHNIDER A Cortical and subcortical anatomy of chronic spatial neglect following vascular damage. BEHAVIORAL AND BRAIN FUNCTIONS 2008 vol. 4 pp. 43- GOLAY L, SCHNIDER A, PTAK R A non-spatial bias favouring fixated stimuli revealed in patients with spatial neglect BRAIN 2007 vol. 130 pp. 3211-3222 PTAK R, SCHNIDER A, GOLAY L, MURI R Reflexive orienting in spatial neglect is biased towards behaviourally salient stimuli CEREBRAL CORTEX 2006 vol. 16(3) pp. 337-345 PTAK R, SCHNIDER A Decision-making in amnesia: do advantageous decisions require conscious knowledge of previous behavioural choices? NEUROPSYCHOLOGIA 2006 vol. 44(8) pp. 1315-1324 GUTBROD K, KROUZEL C, HOFER H, MÜRI R, PERRIG W, PTAK R The inferior temporal lobe mediates distracter-resistant visual search of patients with spatial neglect JOURNAL OF COGNITIVE NEUROSCIENCE 2005 vol. 17 pp. 788-799 PTAK RADEK, VALENZA NATHALIE Dissociated active and passive tactile shape recognition : a case study of pure tactile apraxia BRAIN 2001 vol. 124 (Pt 11) pp. 2287-2298 VALENZA N, PTAK R, ZIMINE I, BADEN M, LAZEYRAS F, SCHNIDER A Research's domains NEUROPSYCHOLOGY AND COGNITIVES NEUROSCIENCES