The temporal sequence of evoked and induced cortical responses to implied-motion processing in human motion area V5/MT+

Ian P Fawcett, Arjan Hillebrand, Krish D Singh

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Previous functional magnetic resonance imaging (fMRI) studies have demonstrated that the human visual motion area V5/MT+ is differentially activated by stimuli in which the presence of motion is implied by the content of static photographs, compared with similar static scenes in which no motion is implied. Here, using a group magnetoencephalography study, we confirm the role of V5/MT+ in the perception of implied motion (IM) by the measurement and localization of task-related evoked and induced oscillatory responses, and demonstrate the temporal sequence of these responses. Within the lateral occipital complex, including V5/MT+, statistically significant differential oscillatory responses to IM and implied-static (IS) stimuli were only found in the beta band (15-20 Hz). An early, evoked, beta power increase (IM>IS) occurred at about 150 ms, whilst a power decrease (IM<IS) occurred at approximately 700 ms. We additionally show that the difference between the early evoked beta responses for the IM and IS conditions only occurs when participants are able to ascertain whether an IM or IS photograph is expected. We therefore hypothesize that the enhanced early response represents covert priming of V5/MT+ for the arrival of a motion stimuli, whilst the late-induced beta power increase for IS stimuli indicates suppression of activity within V5/MT+.

Original languageEnglish
Pages (from-to)775-83
Number of pages9
JournalEuropean Journal of Neuroscience
Volume26
Issue number3
DOIs
Publication statusPublished - Aug 2007
Externally publishedYes

Cite this

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title = "The temporal sequence of evoked and induced cortical responses to implied-motion processing in human motion area V5/MT+",
abstract = "Previous functional magnetic resonance imaging (fMRI) studies have demonstrated that the human visual motion area V5/MT+ is differentially activated by stimuli in which the presence of motion is implied by the content of static photographs, compared with similar static scenes in which no motion is implied. Here, using a group magnetoencephalography study, we confirm the role of V5/MT+ in the perception of implied motion (IM) by the measurement and localization of task-related evoked and induced oscillatory responses, and demonstrate the temporal sequence of these responses. Within the lateral occipital complex, including V5/MT+, statistically significant differential oscillatory responses to IM and implied-static (IS) stimuli were only found in the beta band (15-20 Hz). An early, evoked, beta power increase (IM>IS) occurred at about 150 ms, whilst a power decrease (IM<IS) occurred at approximately 700 ms. We additionally show that the difference between the early evoked beta responses for the IM and IS conditions only occurs when participants are able to ascertain whether an IM or IS photograph is expected. We therefore hypothesize that the enhanced early response represents covert priming of V5/MT+ for the arrival of a motion stimuli, whilst the late-induced beta power increase for IS stimuli indicates suppression of activity within V5/MT+.",
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author = "Fawcett, {Ian P} and Arjan Hillebrand and Singh, {Krish D}",
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The temporal sequence of evoked and induced cortical responses to implied-motion processing in human motion area V5/MT+. / Fawcett, Ian P; Hillebrand, Arjan; Singh, Krish D.

In: European Journal of Neuroscience, Vol. 26, No. 3, 08.2007, p. 775-83.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - The temporal sequence of evoked and induced cortical responses to implied-motion processing in human motion area V5/MT+

AU - Fawcett, Ian P

AU - Hillebrand, Arjan

AU - Singh, Krish D

PY - 2007/8

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N2 - Previous functional magnetic resonance imaging (fMRI) studies have demonstrated that the human visual motion area V5/MT+ is differentially activated by stimuli in which the presence of motion is implied by the content of static photographs, compared with similar static scenes in which no motion is implied. Here, using a group magnetoencephalography study, we confirm the role of V5/MT+ in the perception of implied motion (IM) by the measurement and localization of task-related evoked and induced oscillatory responses, and demonstrate the temporal sequence of these responses. Within the lateral occipital complex, including V5/MT+, statistically significant differential oscillatory responses to IM and implied-static (IS) stimuli were only found in the beta band (15-20 Hz). An early, evoked, beta power increase (IM>IS) occurred at about 150 ms, whilst a power decrease (IM<IS) occurred at approximately 700 ms. We additionally show that the difference between the early evoked beta responses for the IM and IS conditions only occurs when participants are able to ascertain whether an IM or IS photograph is expected. We therefore hypothesize that the enhanced early response represents covert priming of V5/MT+ for the arrival of a motion stimuli, whilst the late-induced beta power increase for IS stimuli indicates suppression of activity within V5/MT+.

AB - Previous functional magnetic resonance imaging (fMRI) studies have demonstrated that the human visual motion area V5/MT+ is differentially activated by stimuli in which the presence of motion is implied by the content of static photographs, compared with similar static scenes in which no motion is implied. Here, using a group magnetoencephalography study, we confirm the role of V5/MT+ in the perception of implied motion (IM) by the measurement and localization of task-related evoked and induced oscillatory responses, and demonstrate the temporal sequence of these responses. Within the lateral occipital complex, including V5/MT+, statistically significant differential oscillatory responses to IM and implied-static (IS) stimuli were only found in the beta band (15-20 Hz). An early, evoked, beta power increase (IM>IS) occurred at about 150 ms, whilst a power decrease (IM<IS) occurred at approximately 700 ms. We additionally show that the difference between the early evoked beta responses for the IM and IS conditions only occurs when participants are able to ascertain whether an IM or IS photograph is expected. We therefore hypothesize that the enhanced early response represents covert priming of V5/MT+ for the arrival of a motion stimuli, whilst the late-induced beta power increase for IS stimuli indicates suppression of activity within V5/MT+.

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KW - Evoked Potentials, Visual/physiology

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KW - Functional Laterality/physiology

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KW - Magnetoencephalography

KW - Male

KW - Motion Perception/physiology

KW - Neuropsychological Tests

KW - Photic Stimulation

KW - Reaction Time/physiology

KW - Temporal Lobe/anatomy & histology

KW - Time Factors

KW - Visual Cortex/physiology

KW - Visual Pathways/anatomy & histology

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JO - European Journal of Neuroscience

JF - European Journal of Neuroscience

SN - 0953-816X

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ER -