Neural correlates of spatial frequency processing: A neuropsychological approach.
We examined the neural correlates of spatial frequency (SF) processing through a gender and neuropsychological approach, using a recognition task of filtered (either in low spatial frequencies/LSF or high spatial frequencies/HSF) natural scene images. Experiment 1 provides evidence for hemispheric specialization in SF processing in men (the right hemisphere is predominantly involved in LSF analysis and the left in HSF analysis) but not in women. Experiment 2 aims to investigate the role of the right occipito-temporal cortex in LSF processing with a neurological female patient who had a focal lesion of this region due to an embolization of an arterioveinous malformation. This study was conducted 1 week before and 6 months after the surgical intervention. As expected, after the embolization, LSF scene recognition was more impaired than HSF scene recognition. These data support the hypothesis that the right occipito-temporal cortex might be preferentially specialized for LSF information processing and more generally suggest a hemispheric specialization in SF processing in females, although it is difficult to demonstrate in healthy women.
Peyrin
Carole
C
Laboratoire de Psychologie et NeuroCognition, UMR 5105-CNRS/Université Pierre Mendès-France, BP 47, 38040 Grenoble Cedex 09, France. carole.peyrin@upmf-grenoble.fr
Chokron
Sylvie
S
Guyader
Nathalie
N
Gout
Olivier
O
Moret
Jacques
J
Marendaz
Christian
C
D000328:Adult; D000704:Analysis of Variance; D001165:Arteriovenous Malformations / Q000473:pathology / Q000503:physiopathology / Q000628:therapy; D002533:Cerebral Angiography / Q000379:methods; D004621:Embolization, Therapeutic / Q000379:methods; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D009778:Occipital Lobe / Q000473:pathology; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology*; D021641:Recognition, Psychology / Q000502:physiology*; D012737:Sex Factors; D013028:Space Perception / Q000502:physiology*; D013702:Temporal Lobe / Q000473:pathology; D014794:Visual Fields / Q000502:physiology