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Woodhead, Z. V., Wise, R. J., Sereno, M., & Leech, R. (2011). Dissociation
of sensitivity to spatial frequency in word and face preferential areas of
the fusiform gyrus. Cerebral Cortex, 21, 2307-2312.
Notes: Different cortical regions within the ventral occipitotemporal
junction have been reported to show preferential responses to particular
objects. Thus, it is argued that there is evidence for a left-lateralized
visual word form area and a right-lateralized fusiform face area, but the
unique specialization of these areas remains controversial. Words are
characterized by greater power in the high spatial frequency (SF) range,
whereas faces comprise a broader range of high and low frequencies. We
investigated how these high-order visual association areas respond to simple
sine-wave gratings that varied in SF. Using functional magnetic resonance
imaging, we demonstrated lateralization of activity that was concordant with
the low-level visual property of words and faces; left occipitotemporal
cortex is more strongly activated by high than by low SF gratings, whereas
the right occipitotemporal cortex responded more to low than high spatial
frequencies. Therefore, the SF of a visual stimulus may bias the
lateralization of processing irrespective of its higher order properties
MRC Clinical Sciences Centre, Imperial College, Hammersmith Hospital, London
W12 0NN, UK. zoe.woodhead06@imperial.ac.uk
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