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Updated: May 8, 2026

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology
Published on: June 29, 2021
Positron emission tomographic studies of the processing of singe words
S E Petersen1, P T Fox, M I Posner
1Washington University School of Medicine, Departments of Neurology, Neurological Surgery and Radiation Sciences, McDonnell Center for Studies of Higher Brain Function, Mallinckrodt Institute of Radiology, Washington University Department of Psychology.
Abstract:
PET images of blood flow change that were averaged across individuals were used to identify brain areas related to lexical (single-word) processing, A small number of discrete areas were activated during several task conditions including: modality-specific (auditory or visual) areas activated by passive word input, primary motor and premotor areas during speech output, and yet further areas during tasks making semantic or intentional demands.
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