Occipital Activation by Pattern Recognition in the Early Blind Using Auditory Substitution for Vision

This PET study aimed at investigating the neural structures involved in pattern recognition in early blind subjects using sensory substitution equipment (SSE). Six early blind and six blindfolded sighted subjects were studied during three auditory processing tasks: a detection task with noise stimul...

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Bibliographic Details
Published in:NeuroImage (Orlando, Fla.) Fla.), 2001-04, Vol.13 (4), p.632-645
Main Authors: Arno, Patricia, De Volder, Anne G., Vanlierde, Annick, Wanet-Defalque, Marie-Chantal, Streel, Emmanuel, Robert, Annie, Sanabria-Bohórquez, Sandra, Veraart, Claude
Format: Article
Language:English
Subjects:
Acoustic Stimulation - methods
Adult
Auditory Perception - physiology
Blindness
Blindness - diagnostic imaging
Blindness - physiopathology
Blindness - psychology
Brain Mapping
Cross-modal
Humans
Information processing
Male
Memory - physiology
Middle Aged
Neuronal Plasticity - physiology
Occipital Lobe - diagnostic imaging
Occipital Lobe - physiopathology
Pattern recognition
Reference Values
Sensorimotor integration
Sensory Deprivation - physiology
Sensory integration
Somatosensory cortex
Sound
Tomography, Emission-Computed
Visual cortex
Visual deprivation
Visual perception
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Summary:This PET study aimed at investigating the neural structures involved in pattern recognition in early blind subjects using sensory substitution equipment (SSE). Six early blind and six blindfolded sighted subjects were studied during three auditory processing tasks: a detection task with noise stimuli, a detection task with familiar sounds, and a pattern recognition task using the SSE. The results showed a differential activation pattern with the SSE as a function of the visual experience: in addition to the regions involved in the recognition process in sighted control subjects, occipital areas of early blind subjects were also activated. The occipital activation was more important when the early blind subjects used SSE than during the other auditory tasks. These results suggest that activity of the extrastriate visual cortex of early blind subjects can be modulated and bring additional evidence that early visual deprivation leads to cross-modal cerebral reorganization.
ISSN:1053-8119
1095-9572
DOI:10.1006/nimg.2000.0731