Positron emission tomographic studies of the processing of singe words
Journal of Cognitive Neuroscience
The cortical representation of speech
Journal of Cognitive Neuroscience
Orthographic Distinctiveness and Semantic Elaboration Provide Separate Contributions to Memory
Journal of Cognitive Neuroscience
Distinct Brain Systems for Processing Concrete and Abstract Concepts
Journal of Cognitive Neuroscience
Covert Speech Arrest Induced by rTMS over Both Motor and Nonmotor Left Hemisphere Frontal Sites
Journal of Cognitive Neuroscience
Development of Brain Mechanisms for Processing Orthographic and Phonologic Representations
Journal of Cognitive Neuroscience
Common and Contrasting Areas of Activation for Abstract and Concrete Concepts: An H215O PET Study
Journal of Cognitive Neuroscience
An fMRI Study of Syntactic Adaptation
Journal of Cognitive Neuroscience
An Event-Related fMRI Investigation of Implicit Semantic Priming
Journal of Cognitive Neuroscience
Language Lateralization in a Bimanual Language
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Neural Correlates of Lexical Access during Visual Word Recognition
Journal of Cognitive Neuroscience
A Parametric Manipulation of Factors Affecting Task-induced Deactivation in Functional Neuroimaging
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Task-Dependent Modulation of Regions in the Left Inferior Frontal Cortex during Semantic Processing
Journal of Cognitive Neuroscience
The Effects of Case Mixing on Word Recognition: Evidence from a PET Study
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Imaging Cognition II: An Empirical Review of 275 PET and fMRI Studies
Journal of Cognitive Neuroscience
Semantic Cortical Activation in Dyslexic Readers
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
The Neural Circuitry Involved in the Reading of German Words and Pseudowords: A PET Study
Journal of Cognitive Neuroscience
Functional Neuroanatomy of the Semantic System: Divisible by What?
Journal of Cognitive Neuroscience
A Functional Neuroimaging Description of Two Deep Dyslexic Patients
Journal of Cognitive Neuroscience
Syntactic and Semantic Modulation of Neural Activity during Auditory Sentence Comprehension
Journal of Cognitive Neuroscience
Neural Response Suppression Predicts Repetition Priming of Spoken Words and Pseudowords
Journal of Cognitive Neuroscience
Cortical Mechanisms Involved in the Processing of Verbs: An fMRI Study
Journal of Cognitive Neuroscience
Prefrontal Cortical Response to Conflict during Semantic and Phonological Tasks
Journal of Cognitive Neuroscience
Lexical-semantic activation in broca's and wernicke's aphasia: Evidence from eye movements
Journal of Cognitive Neuroscience
Time course of evoked-potential changes in different forms of anomia in aphasia
Journal of Cognitive Neuroscience
Neural systems underlying lexical competition: An eye tracking and fmri study
Journal of Cognitive Neuroscience
Contrasting effects of vocabulary knowledge on temporal and parietal brain structure across lifespan
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Hi-index | 0.00 |
A number of previous functional neuroimaging studies have linked activation of the left inferior frontal gyms with semantic processing, yet damage to the frontal lobes does not critically impair semantic knowledge. This study distinguishes between semantic knowledge and the strategic processes required to make verbal decisions. Using positron emission tomography (PET), we identify the neural correlates of semantic knowledge by contrasting semantic decision on visually presented words to phonological decision on the same words. Both tasks involve identical stimuli and a verbal decision on central lingual codes (semantics and phonology), but the explicit task demands directed attention either to meaning or to the segmentation of phonology. Relative to the phonological task, the semantic task was associated with activations in left extrasylvian temporal cortex with the highest activity in the left temporal pole and a posterior region of the left middle temporal cortex (BA 39) close to the angular gyrus. The reverse contrast showed increased activity in both supramarginal gyri, the left precentral sulcus, and the cuneus with a trend toward enhanced activation in the inferior frontal cortex. These results fit well with neuropsychological evidence, associating semantic knowledge with the extrasylvian left temporal cortex and the segmentation of phonology with the perisylvian cortex.