AFNI: software for analysis and visualization of functional magnetic resonance neuroimages
Computers and Biomedical Research
Human Problem Solving
Common blood flow changes across visual tasks: Ii. decreases in cerebral cortex
Journal of Cognitive Neuroscience
Blood oxygenation level dependent functional magnetic resonance imaging
Concepts in Magnetic Resonance: an Educational Journal - Functional magnetic resonance imaging
Functional imaging and language: a critical guide to methodology and analysis
Speech Communication - Special issue on the nature of speech perception (the psychophysics of speech perception III)
fMRI of Past Tense Processing: The Effects of Phonological Complexity and Task Difficulty
Journal of Cognitive Neuroscience
Effect of Language Switching on Arithmetic: A Bilingual fMRI Study
Journal of Cognitive Neuroscience
The Perception of Voice Onset Time: An fMRI Investigation of Phonetic Category Structure
Journal of Cognitive Neuroscience
Distinct Brain Systems for Processing Concrete and Abstract Concepts
Journal of Cognitive Neuroscience
Neural Topography and Content of Movement Representations
Journal of Cognitive Neuroscience
Deactivations, Global Signal, and the Default Mode of Brain Function
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Reading in a Regular Orthography: An fMRI Study Investigating the Role of Visual Familiarity
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Multiple Neuronal Networks Mediate Sustained Attention
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
Neuroimaging Studies of Word and Pseudoword Reading: Consistencies, Inconsistencies, and Limitations
Journal of Cognitive Neuroscience
Neural Substrates of Action Event Knowledge
Journal of Cognitive Neuroscience
Deactivation of Sensory-Specific Cortex by Cross-Modal Stimuli
Journal of Cognitive Neuroscience
fMRI Study of Cognitive Interference Processing in Females with Fragile X Syndrome
Journal of Cognitive Neuroscience
Dissociating the Neural Mechanisms of Visual Attention in Change Detection Using Functional MRI
Journal of Cognitive Neuroscience
The Effects of Presentation Rate During Word and Pseudoword Reading: A Comparison of PET and fMRI
Journal of Cognitive Neuroscience
Mental Imagery of Faces and Places Activates Corresponding Stiimulus-Specific Brain Regions
Journal of Cognitive Neuroscience
Syntactic and Semantic Modulation of Neural Activity during Auditory Sentence Comprehension
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Age Differences in Deactivation: A Link to Cognitive Control?
Journal of Cognitive Neuroscience
Power in Voxel-based Lesion-Symptom Mapping
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Cognitive and emotional modulation of brain default operation
Journal of Cognitive Neuroscience
Default-Mode Network Activity Identified by Group Independent Component Analysis
ICIC '07 Proceedings of the 3rd International Conference on Intelligent Computing: Advanced Intelligent Computing Theories and Applications. With Aspects of Artificial Intelligence
Visual and semantic processing of living things and artifacts: An fmri study
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Basic level advantage and its switching during information retrieval: an fMRI study
BI'10 Proceedings of the 2010 international conference on Brain informatics
Complex spiking models: a role for diffuse thalamic projections in complex cortical activity
ICONIP'10 Proceedings of the 17th international conference on Neural information processing: theory and algorithms - Volume Part I
Journal of Cognitive Neuroscience
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Localized, task-induced decreases in cerebral blood flow are a frequent finding in functional brain imaging research but remain poorly understood. One account of these phenomena postulates processes ongoing during conscious, resting states that are interrupted or inhibited by task performance. Psychological evidence suggests that conscious humans are engaged almost continuously in adaptive processes involving semantic knowledge retrieval, representation in awareness, and directed manipulation of represented knowledge for organization,problem-solving, and planning. If interruption of such ''conceptual'' processes accounts for task-induced deactivation, tasks that also engage these conceptual processes should not cause deactivation. Furthermore, comparisons between conceptual and nonconceptual tasks should show activation during conceptual tasks of the same brain areas that are ''deactivated'' relative to rest. To test this model, functional magnetic resonance imaging data were acquired during a resting state,a perceptual task,and a semantic retrieval task. A network of left-hemisphere polymodal cortical regions showed higher signal values during the resting state than during the perceptual task but equal values during the resting and semantic conditions. This result is consistent with the proposal that perceptual tasks interrupt processes ongoing during rest that involve many of the same brain areas engaged during semantic retrieval. As further evidence for this model, the same network of brain areas was activated in two direct comparisons between semantic and perceptual processing tasks. This same ''conceptual processing'' network was also identified in several previous studies that contrasted semantic and perceptual tasks or resting and active states. The model proposed here offers a unified account of these findings and may help to explain several unanticipated results from prior studies of semantic processing.