Parallelism in the brain's visual form system

Y Shigihara, S Zeki - European Journal of Neuroscience, 2013 - Wiley Online Library
We used magnetoencephalography (MEG) to determine whether increasingly complex
forms constituted from the same elements (lines) activate visual cortex with the same or …

Parallel processing in the brain's visual form system: an fMRI study

Y Shigihara, S Zeki - Frontiers in human neuroscience, 2014 - frontiersin.org
We here extend and complement our earlier time-based, magneto-encephalographic
(MEG), study of the processing of forms by the visual brain (Shigihara and Zeki,) with a …

Form-from-motion: MEG evidence for time course and processing sequence

MA Schoenfeld, M Woldorff, E Düzel… - Journal of Cognitive …, 2003 - direct.mit.edu
The neural mechanisms and role of attention in the processing of visual form defined by
luminance or motion cues were studied using magnetoencephalography. Subjects viewed …

Differential human brain activation by vertical and horizontal global visual textures

JE Aspell, J Wattam-Bell, J Atkinson… - Experimental brain …, 2010 - Springer
Mid-level visual processes which integrate local orientation information for the detection of
global structure can be investigated using global form stimuli of varying complexity. Several …

Cerebral cortical mechanisms of copying geometrical shapes: a multidimensional scaling analysis of fMRI patterns of activation

C Tzagarakis, TA Jerde, SM Lewis, K Uğurbil… - Experimental brain …, 2009 - Springer
We used multidimensional scaling (MDS) to characterize the integrative neural mechanisms
during viewing and subsequently copying nine geometrical shapes. Human subjects initially …

Functional specialization and dynamic resource allocation in visual cortex

G Plomp, C Leeuwen, AA Ioannides - Human Brain Mapping, 2010 - Wiley Online Library
We studied the spatiotemporal characteristics of cortical activity in early visual areas and the
fusiform gyri (FG) by means of magnetoencephalography (MEG). Subjects performed a …

Parallel processing of face and house stimuli by V1 and specialized visual areas: a magnetoencephalographic (MEG) study

Y Shigihara, S Zeki - Frontiers in human neuroscience, 2014 - frontiersin.org
We used easily distinguishable stimuli of faces and houses constituted from straight lines,
with the aim of learning whether they activate V1 on the one hand, and the specialized areas …

Perceptual similarity of visual patterns predicts dynamic neural activation patterns measured with MEG

SG Wardle, N Kriegeskorte, T Grootswagers… - Neuroimage, 2016 - Elsevier
Perceptual similarity is a cognitive judgment that represents the end-stage of a complex
cascade of hierarchical processing throughout visual cortex. Previous studies have shown a …

Functional magnetic resonance imaging of visual object construction and shape discrimination: relations among task, hemispheric lateralization, and gender

AP Georgopoulos, K Whang… - Journal of cognitive …, 2001 - ieeexplore.ieee.org
We studied the brain activation patterns in two visual image processing tasks requiring
judgements on object construction (FIT task) or object sameness (SAME task). Eight right …

Masking reveals parallel form systems in the visual brain

YT Lo, S Zeki - Frontiers in Human Neuroscience, 2014 - frontiersin.org
It is generally supposed that there is a single, hierarchically organized pathway dedicated to
form processing, in which complex forms are elaborated from simpler ones, beginning with …