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You are here: Scientific Experts > Australia > Macquarie University > Williams > Mark A Williams
Research Topics visual pattern recognition photic stimulation prosopagnosia brain mapping visual cortex happiness temporal lobe oxygen blinking visual evoked potentials computer assisted image processing amygdala feedback fear evoked potentials nerve net visual pathways social behavior orientation visual fields facial expression attention action potentials cerebral cortex task performance and analysis emotions affect neuropsychological tests case control studies neurons
Mark A Williams
Collaborators
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Affiliation: Macquarie University Country: Australia
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Attenuation of neural responses in primary visual cortex during the attentional blink
Mark A Williams Macquarie Centre for Cognitive Science, Macquarie University, Sydney, New South Wales 2109, Australia J Neurosci 28:9890-4. 2008
humans
Stimulus-driven and strategic neural responses to fearful and happy facial expressions in
Mark A Williams Macquarie Centre for Cognitive Science, Macquarie University, Sydney, NSW 2109, Australia Eur J Neurosci 27:3074-82. 2008
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Abnormal FMRI adaptation to unfamiliar faces in a case of developmental prosopamnesia
Mark A Williams Macquarie Centre for Cognitive Science, Macquarie University, Sydney, NSW 2109, Australia Curr Biol 17:1259-64. 2007
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Feedback of visual object information to foveal retinotopic cortex
Mark A Williams McGovern Institute for Brain Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA Nat Neurosci 11:1439-45. 2008
Regine Zopf Jason Friedman Bhuvanesh Awasthi Jason B Mattingley Romina Palermo Thomas Lundeberg Francis McGlone Davide Rivolta Laura Schmalzl Samantha Baggott Matthew Finkbeiner Troy A W Visser Won Mok Shim Chris I Baker Nancy G Kanwisher Hans P Op de Beeck Aina Puce Anina N Rich Adam P Morris Ross Cunnington Nicole Rinehart Im Quah-Smith Trevor T J Chong Perminder Sachdev Chao Suo
Preference for orientations commonly viewed for one's own hand in the anterior intraparietal cortex Regine Zopf Department of Cognitive Science, Macquarie University, Sydney, New South Wales, Australia PLoS ONE 8:e53812. 2013
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Faster, stronger, lateralized: low spatial frequency information supports face processing
Bhuvanesh Awasthi Centre for Cognition and its Disorders CCD, Macquarie University, NSW 2109, Australia Neuropsychologia 49:3583-90. 2011
Only some spatial patterns of fMRI response are read out in task performance
Mark A Williams McGovern Institute for Brain Research, 77 Massachusetts Avenue, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Nat Neurosci 10:685-6. 2007
Viewing and feeling touch modulates hand position for reaching
Regine Zopf Institute of Human Cognition and Brain Science, Macquarie University, Sydney, NSW 2109, Australia Neuropsychologia 49:1287-93. 2011
Processing of low spatial frequency faces at periphery in choice reaching tasks
Bhuvanesh Awasthi Macquarie Centre for Cognitive Science, Macquarie University, NSW 2109, Australia Neuropsychologia 49:2136-41. 2011
Involuntary facial expression processing: extracting information from two simultaneously presented faces Samantha Baggott ARC Centre for Cognition and its Disorders and Macquarie Centre for Cognitive Science MACCS, Macquarie University, Sydney, New South Wales, Australia PLoS ONE 6:e22287. 2011
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Attenuation of neural responses in primary visual cortex during the attentional blink
Stimulus-driven and strategic neural responses to fearful and happy facial expressions in humans
Mark A Williams Macquarie Centre for Cognitive Science, Macquarie University, Sydney, New South Wales 2109, Australia J Neurosci 28:9890-4. 2008 ..The findings suggest that the neural signature of perceptual suppression during processing of rapidly successive stimuli is evident at the earliest stages of cortical sensory processing... Mark A Williams Macquarie Centre for Cognitive Science, Macquarie University, Sydney, NSW 2109, Australia Eur J Neurosci 27:3074-82. 2008 ....
Abnormal FMRI adaptation to unfamiliar faces in a case of developmental prosopamnesia
Mark A Williams Macquarie Centre for Cognitive Science, Macquarie University, Sydney, NSW 2109, Australia Curr Biol 17:1259-64. 2007 ..Our findings suggest that in developmental prosopamnesia, the FFA cannot maintain stable representations of new faces for subsequent recall or recognition...
Feedback of visual object information to foveal retinotopic cortex
Mark A Williams McGovern Institute for Brain Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA Nat Neurosci 11:1439-45. 2008 ..Instead, our findings indicate that position-invariant object information from higher cortical areas is fed back to foveal retinotopic cortex, enhancing task performance...
Preference for orientations commonly viewed for one's own hand in the anterior intraparietal cortex
Regine Zopf Department of Cognitive Science, Macquarie University, Sydney, New South Wales, Australia PLoS ONE 8:e53812. 2013 ..Our results indicate that both anterior intraparietal and occipitotemporal areas encode visual limb-specific shape and orientation information...
Faster, stronger, lateralized: low spatial frequency information supports face processing
Bhuvanesh Awasthi Centre for Cognition and its Disorders CCD, Macquarie University, NSW 2109, Australia Neuropsychologia 49:3583-90. 2011 ..The early processing of LSF information supports the assumption that faces are prioritised and provides a (neural) framework for such specialised processing...
Only some spatial patterns of fMRI response are read out in task performance
Mark A Williams McGovern Institute for Brain Research, 77 Massachusetts Avenue, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Nat Neurosci 10:685-6. 2007 ..Thus, some, but not all, spatial patterns are read out during task performance...
Viewing and feeling touch modulates hand position for reaching
Regine Zopf Institute of Human Cognition and Brain Science, Macquarie University, Sydney, NSW 2109, Australia Neuropsychologia 49:1287-93. 2011 ..On the basis of this data and previous findings, we propose that the brain uses correlated cues from passive touch and vision to update its own position for action and experience of self-location...
Processing of low spatial frequency faces at periphery in choice reaching tasks
Bhuvanesh Awasthi Macquarie Centre for Cognitive Science, Macquarie University, NSW 2109, Australia Neuropsychologia 49:2136-41. 2011 ..These results demonstrate that peripherally presented LSF information, carried chiefly by magnocellular channels, enables efficient processing of faces, possibly via a retinotectal (subcortical) pathway...
Involuntary facial expression processing: extracting information from two simultaneously presented faces
Samantha Baggott ARC Centre for Cognition and its Disorders and Macquarie Centre for Cognitive Science MACCS, Macquarie University, Sydney, New South Wales, Australia PLoS ONE 6:e22287. 2011 ..These findings suggest that information from angry facial expressions can be extracted rapidly from a very brief presentation (50 ms), providing compelling evidence that angry facial expressions are processed involuntarily...
Abnormal configural face perception in a patient with right anterior temporal lobe atrophy
Mark A Williams McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Neurocase 12:286-91. 2006 ..We demonstrate that this patient is not able to process faces via configural information, raising the possibility that the right anterior temporal lobe has a role in configural face processing...
Examining the role of red background in magnocellular contribution to face perception
Bhuvanesh Awasthi Centre for Cognition and Decision Making, National Research University Higher School of Economics, Moscow, Russia ARC Centre of Excellence in Cognition and its Disorders, Department of Cognitive Science, Macquarie University, Sydney, Australia Peerj 4:e1617. 2016 ..This finding provides behavioral evidence for magnocellular contribution to non-emotional aspect of face perception. ..
The plausibility of visual information for hand ownership modulates multisensory synchrony perception
Regine Zopf Perception in Action Research Centre and Department of Cognitive Science, Faculty of Human Sciences, Macquarie University, Sydney, NSW 2109, Australia Exp Brain Res 233:2311-21. 2015 ..We suggest that this perceptual modulation when visual information plausible for one's own body is present is a consequence of body-specific sensory predictions. ..
Differential brain effects of laser and needle acupuncture at LR8 using functional MRI
Im Quah-Smith School of Psychiatry, University of New South Wales and Neuropsychiatric Institute NPI, Prince of Wales Hospital, Sydney, New South Wales, Australia Acupunct Med 31:282-9. 2013 ..The differential effects of the two techniques are of interest. We examine this in relation to brain effects of activation of LR8, a putative acupuncture point for depression, using functional MRI (fMRI)...
Reach trajectories reveal delayed processing of low spatial frequency faces in developmental prosopagnosia
Crossmodal congruency measures of lateral distance effects on the rubber hand illusion
Body distortions in Anorexia Nervosa: Evidence for changed processing of multisensory bodily signals
An early category-specific neural response for the perception of both places and faces
Magnetoencephalography in neuropsychiatry: ready for application?
Bhuvanesh Awasthi a Centre for Cognition and Its Disorders, Macquarie University, Sydney, Australia Cogn Neurosci 3:120-30. 2012 ..These results suggest that quick and efficient processing of LSF information is critical for the development of normal face perception... Regine Zopf Macquarie Centre for Cognitive Science, Macquarie University, Sydney, NSW 2109, Australia Neuropsychologia 48:713-25. 2010 ....
Regine Zopf Perception in Action Research Centre and Department of Cognitive Science, Faculty of Human Sciences, Macquarie University and ARC Centre of Excellence in Cognition and its Disorders, Macquarie University, Sydney, Australia Electronic address Psychiatry Res 245:473-481. 2016 ..Our findings provide compelling evidence that multisensory body location perception - specifically the processing of visual-proprioceptive signals - is changed in AN... Davide Rivolta a Macquarie Centre for Cognitive Science MACCS, Macquarie University, Sydney, Australia Cogn Neurosci 3:45-51. 2012 ..Our findings suggest that early visual categorization within cortical areas does not occur exclusively for faces, but instead may be a more general phenomenon... Mark A Williams Macquarie Centre for Cognitive Sciences, Macquarie University, Sydney, Australia Curr Opin Psychiatry 23:273-7. 2010 ..It is therefore an opportune time to review how MEG is able to contribute to neuropsychiatric research and practice...
Amygdala responses to fearful and happy facial expressions under conditions of binocular suppression
Differential amygdala responses to happy and fearful facial expressions depend on selective attention
Neural correlates of imagined and synaesthetic colours
Mark A Williams Cognitive Neuroscience Laboratory, School of Behavioral Science, University of Melbourne, Parkville, Victoria 3010, Australia J Neurosci 24:2898-904. 2004 ..We suggest that this limited capacity reflects a tradeoff between specificity and speed of processing...
Mark A Williams Cognitive Neuroscience Laboratory, School of Behavioural Science, University of Melbourne, Victoria 3010, Australia Neuroimage 24:417-25. 2005 ..We conclude that differential amygdala responses to fearful versus happy facial expressions are tuned by mechanisms of attention and that the amygdala gives preference to potentially threatening stimuli under conditions of inattention... Anina N Rich Cognitive Neuroscience Laboratory, School of Behavioural Science, University of Melbourne, Victoria 3010, Australia Neuropsychologia 44:2918-25. 2006 ..Our data suggest that internally generated colour experiences recruit brain regions specialised for colour perception, with striking differences between voluntary colour imagery and synaesthetically induced colours...
Selective attention modulates inferior frontal gyrus activity during action observation
Trevor T J Chong School of Behavioural Science, University of Melbourne, Victoria 3010, Australia Neuroimage 40:298-307. 2008 ....
Interleukin 8 dimerization as a mechanism for regulation of neutrophil adherence-dependent oxidant production
Do angry men get noticed?
Temporal effects of dialysis on cognitive functioning in patients with ESRD
A unique look at face processing: the impact of masked faces on the processing of facial features
Unconscious perception of non-threatening facial emotion in parietal extinction
Random number generation in autism
Mark A Williams Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267 0558, USA Shock 23:371-6. 2005 ..These data suggest that although IL-8 dimers or monomers are sufficient for several neutrophil functions, dimers may participate in suppression of specific surface-dependent neutrophil responses... Mark A Williams Curr Biol 16:R402-4. 2006
Mark A Williams Environmental Neuropsychology Laboratory, State University of New York at Binghamton, Binghamton, NY, USA Am J Kidney Dis 43:705-11. 2004 ..Although dialysis has been shown to improve cognitive deficits resulting from uremia, little is known about potential temporal variations in cognitive measures between hemodialysis treatments... Mark A Williams Department of Psychology, School of Behavioural Science, University of Melbourne, Parkville, Victoria, 3010, Australia Cognition 91:155-72. 2004 .... Mark A Williams Department of Psychology, University of Melbourne, 3010, Victoria, Australia Exp Brain Res 154:403-6. 2004 ....
Mark A Williams Department of Psychology, Monash University, Vic, Australia J Autism Dev Disord 32:43-7. 2002 ..Accordingly, low-functioning individuals with autism may exhibit a short-fall in response inhibition. This finding supports the executive dysfunction theory of autism...
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