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Studies of primates and of patients with brain lesions have shown that the visual system represents the external world in regions and pathways specialized to compute visual features and attributes. For example, object recognition is performed by a ventral pathway located in the inferior portion of the temporal lobe. We studied visual processing of words and word-like stimuli (letter-strings) by recording field potentials directly from the human inferior temporal lobe. Our results showed that two discrete portions of the fusiform gyrus responded preferentially to letter-strings. A region of the posterior fusiform gyrus responded equally to words and non-words, and was unaffected by the semantic context in which words were presented. In contrast, a region of the anterior fusiform gyrus was sensitive to these stimulus dimensions. These regions were distinct from areas that responded to other types of complex visual stimuli, including faces and coloured patterns, and thus form a functionally specialized stream within the ventral visual pathway.

Original publication

DOI

10.1038/372260a0

Type

Journal article

Journal

Nature

Publication Date

17/11/1994

Volume

372

Pages

260 - 263

Keywords

Adult, Brain Mapping, Electroencephalography, Epilepsy, Evoked Potentials, Visual, Face, Female, Humans, Male, Middle Aged, Reading, Temporal Lobe, Visual Pathways, Visual Perception