Changes in human brain dynamics during behavioral priming and repetition suppression.
Adult
Brain Waves
/ physiology
Cerebral Cortex
/ physiology
Electrocorticography
/ methods
Epilepsy
/ surgery
Evoked Potentials
/ physiology
Functional Neuroimaging
Humans
Nerve Net
/ physiology
Pattern Recognition, Visual
/ physiology
Psychomotor Performance
/ physiology
Reaction Time
/ physiology
Repetition Priming
/ physiology
Speech
/ physiology
Effective connectivity
Event related causality (ERC)
Expectation
Intracranial EEG
Language
Large scale brain network
Journal
Progress in neurobiology
ISSN: 1873-5118
Titre abrégé: Prog Neurobiol
Pays: England
ID NLM: 0370121
Informations de publication
Date de publication:
06 2020
06 2020
Historique:
received:
22
05
2019
revised:
13
01
2020
accepted:
13
03
2020
pubmed:
22
3
2020
medline:
27
4
2021
entrez:
22
3
2020
Statut:
ppublish
Résumé
Behavioral responses to a perceptual stimulus are typically faster with repeated exposure to the stimulus (behavioral priming). This implicit learning mechanism is critical for survival but impaired in a variety of neurological disorders, including Alzheimer's disease. Many studies of the neural bases for behavioral priming have encountered an interesting paradox: in spite of faster behavioral responses, repeated stimuli usually elicit weaker neural responses (repetition suppression). Several neurophysiological models have been proposed to resolve this paradox, but noninvasive techniques for human studies have had insufficient spatial-temporal precision for testing their predictions. Here, we used the unparalleled precision of electrocorticography (ECoG) to analyze the timing and magnitude of task-related changes in neural activation and propagation while patients named novel vs repeated visual objects. Stimulus repetition was associated with faster verbal responses and decreased neural activation (repetition suppression) in ventral occipito-temporal cortex (VOTC) and left prefrontal cortex (LPFC). Interestingly, we also observed increased neural activation (repetition enhancement) in LPFC and other recording sites. Moreover, with analysis of high gamma propagation we observed increased top-down propagation from LPFC into VOTC, preceding repetition suppression. The latter results indicate that repetition suppression and behavioral priming are associated with strengthening of top-down network influences on perceptual processing, consistent with predictive coding models of repetition suppression, and they support a central role for changes in large-scale cortical dynamics in achieving more efficient and rapid behavioral responses.
Identifiants
pubmed: 32198060
pii: S0301-0082(20)30043-5
doi: 10.1016/j.pneurobio.2020.101788
pmc: PMC7198339
mid: NIHMS1582055
pii:
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
101788Subventions
Organisme : NINDS NIH HHS
ID : R01 NS040596
Pays : United States
Organisme : NINDS NIH HHS
ID : R01 NS091139
Pays : United States
Informations de copyright
Copyright © 2020 Elsevier Ltd. All rights reserved.
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