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Quek GL, de Heering A. Visual periodicity reveals distinct attentional signatures for face and non-face categories. Cereb Cortex 2024; 34:bhae228. [PMID: 38879816 PMCID: PMC11180377 DOI: 10.1093/cercor/bhae228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 03/19/2024] [Accepted: 05/14/2024] [Indexed: 06/19/2024] Open
Abstract
Observers can selectively deploy attention to regions of space, moments in time, specific visual features, individual objects, and even specific high-level categories-for example, when keeping an eye out for dogs while jogging. Here, we exploited visual periodicity to examine how category-based attention differentially modulates selective neural processing of face and non-face categories. We combined electroencephalography with a novel frequency-tagging paradigm capable of capturing selective neural responses for multiple visual categories contained within the same rapid image stream (faces/birds in Exp 1; houses/birds in Exp 2). We found that the pattern of attentional enhancement and suppression for face-selective processing is unique compared to other object categories: Where attending to non-face objects strongly enhances their selective neural signals during a later stage of processing (300-500 ms), attentional enhancement of face-selective processing is both earlier and comparatively more modest. Moreover, only the selective neural response for faces appears to be actively suppressed by attending towards an alternate visual category. These results underscore the special status that faces hold within the human visual system, and highlight the utility of visual periodicity as a powerful tool for indexing selective neural processing of multiple visual categories contained within the same image sequence.
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Affiliation(s)
- Genevieve L Quek
- The MARCS Institute for Brain, Behaviour and Development, Western Sydney University, Westmead Innovation Quarter, 160 Hawkesbury Rd, Westmead NSW 2145, Australia
| | - Adélaïde de Heering
- Unité de Recherche en Neurosciences Cognitives (UNESCOG), ULB Neuroscience Institue (UNI), Center for Research in Cognition & Neurosciences (CRCN), Université libre de Bruxelles (ULB), Avenue Franklin Roosevelt, 50-CP191, 1050 Brussels, Belgium
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2
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Wu T, Cai Y, Zhang R, Wang Z, Tao L, Xiao ZC. Multi-band oscillations emerge from a simple spiking network. CHAOS (WOODBURY, N.Y.) 2023; 33:043121. [PMID: 37097932 DOI: 10.1063/5.0106884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 03/14/2023] [Indexed: 06/19/2023]
Abstract
In the brain, coherent neuronal activities often appear simultaneously in multiple frequency bands, e.g., as combinations of alpha (8-12 Hz), beta (12.5-30 Hz), and gamma (30-120 Hz) oscillations, among others. These rhythms are believed to underlie information processing and cognitive functions and have been subjected to intense experimental and theoretical scrutiny. Computational modeling has provided a framework for the emergence of network-level oscillatory behavior from the interaction of spiking neurons. However, due to the strong nonlinear interactions between highly recurrent spiking populations, the interplay between cortical rhythms in multiple frequency bands has rarely been theoretically investigated. Many studies invoke multiple physiological timescales (e.g., various ion channels or multiple types of inhibitory neurons) or oscillatory inputs to produce rhythms in multi-bands. Here, we demonstrate the emergence of multi-band oscillations in a simple network consisting of one excitatory and one inhibitory neuronal population driven by constant input. First, we construct a data-driven, Poincaré section theory for robust numerical observations of single-frequency oscillations bifurcating into multiple bands. Then, we develop model reductions of the stochastic, nonlinear, high-dimensional neuronal network to capture the appearance of multi-band dynamics and the underlying bifurcations theoretically. Furthermore, when viewed within the reduced state space, our analysis reveals conserved geometrical features of the bifurcations on low-dimensional dynamical manifolds. These results suggest a simple geometric mechanism behind the emergence of multi-band oscillations without appealing to oscillatory inputs or multiple synaptic or neuronal timescales. Thus, our work points to unexplored regimes of stochastic competition between excitation and inhibition behind the generation of dynamic, patterned neuronal activities.
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Affiliation(s)
- Tianyi Wu
- School of Mathematical Sciences, Peking University, Beijing 100871, China
- Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering, School of Life Sciences, Peking University, Beijing 100871, China
- Courant Institute of Mathematical Sciences, New York University, New York, New York 10003, USA
| | - Yuhang Cai
- Department of Mathematics, University of California, Berkeley, Berkeley, California 94720, USA
| | - Ruilin Zhang
- Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering, School of Life Sciences, Peking University, Beijing 100871, China
- Yuanpei College, Peking University, Beijing 100871, China
| | - Zhongyi Wang
- School of Mathematical Sciences, Peking University, Beijing 100871, China
- Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering, School of Life Sciences, Peking University, Beijing 100871, China
| | - Louis Tao
- Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering, School of Life Sciences, Peking University, Beijing 100871, China
- Center for Quantitative Biology, Peking University, Beijing 100871, China
| | - Zhuo-Cheng Xiao
- Courant Institute of Mathematical Sciences, New York University, New York, New York 10003, USA
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3
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Hudson MR, Jones NC. Deciphering the code: Identifying true gamma neural oscillations. Exp Neurol 2022; 357:114205. [PMID: 35985554 DOI: 10.1016/j.expneurol.2022.114205] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 11/04/2022]
Abstract
Neural oscillatory activity occurring in the gamma frequency range (30-80 Hz) has been proposed to play essential roles in sensory and cognitive processing. Supporting this, abnormalities in gamma oscillations have been reported in patients with diverse neurological and neuropsychiatric disorders in which cognitive impairment is prominent. Understanding the mechanisms underpinning this relationship is the focus of extensive research. But while an increasing number of studies are investigating the intricate relationship between gamma oscillations and cognition, interpretation and generalisation of these studies is limited by the diverse, and at times questionable, methodologies used to analyse oscillatory activity. For example, a variety of different types of gamma oscillatory activity have been characterised, but all are generalised non-specifically as 'gamma oscillations'. This creates confusion, since distinct cellular and network mechanisms are likely responsible for generating these different types of rhythm. Moreover, in some instances, certain analytical measures of electrophysiological data are overinterpreted, with researchers pushing the boundaries of what would be considered rhythmic or oscillatory in nature. Here, we provide clarity on these issues, firstly presenting an overview of the different measures of gamma oscillatory activity, and describing common signal processing techniques used for analysis. Limitations of these techniques are discussed, and recommendations made on how future studies should optimise analyses, presentation and interpretation of gamma frequency oscillations. This is an essential progression in order to harmonise future studies, allowing us to gain a clearer understanding of the role of gamma oscillations in cognition, and in cognitive disorders.
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Affiliation(s)
- Matthew R Hudson
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria 3004, Australia
| | - Nigel C Jones
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria 3004, Australia; Department of Neurology, The Alfred Hospital, Commercial Road, Melbourne, 3004, Victoria, Australia; Department of Medicine (Royal Melbourne Hospital), University of Melbourne, Parkville, Victoria 3052, Australia.
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4
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Kim JW, Brückner KE, Badenius C, Hamel W, Schaper M, Le Van Quyen M, El-Allawy-Zielke EK, Stodieck SRG, Hebel JM, Lanz M. Face-induced gamma oscillations and event-related potentials in patients with epilepsy: an intracranial EEG study. BMC Neurosci 2022; 23:36. [PMID: 35698042 PMCID: PMC9195313 DOI: 10.1186/s12868-022-00715-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 03/22/2022] [Indexed: 12/05/2022] Open
Abstract
Background To examine the pathological effect of a mesial temporal seizure onset zone (SOZ) on local and inter-regional response to faces in the amygdala and other structures of the temporal lobe. Methods Intracranial EEG data was obtained from the amygdala, hippocampus, fusiform gyrus and parahippocampal gyrus of nine patients with drug-refractory epilepsy during visual stimulation with faces and mosaics. We analyzed event-related potentials (ERP), gamma frequency power, phase-amplitude coupling and phase-slope-index and compared the results between patients with versus without a mesial temporal SOZ. Results In the amygdala and fusiform gyrus, faces triggered higher ERP amplitudes compared to mosaics in both patient groups and higher gamma power in patients without a mesial temporal SOZ. In the hippocampus, famous faces triggered higher gamma power for both groups combined but did not affect ERPs in either group. The differentiated ERP response to famous faces in the parahippocampal gyrus was more pronounced in patients without a mesial temporal SOZ. Phase-amplitude coupling and phase-slope-index results yielded bidirectional modulation between amygdala and fusiform gyrus, and predominately unidirectional modulation between parahippocampal gyrus and hippocampus. Conclusions A mesial temporal SOZ was associated with an impaired response to faces in the amygdala, fusiform gyrus and parahippocampal gyrus in our patients. Compared to this, the response to faces in the hippocampus was impaired in patients with, as well as without, a mesial temporal SOZ. Our results support existing evidence for face processing deficits in patients with a mesial temporal SOZ and suggest the pathological effect of a mesial temporal SOZ on the amygdala to play a pivotal role in this matter in particular.
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Affiliation(s)
- Ji-Won Kim
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. .,Epilepsy Center Hamburg, Protestant Hospital Alsterdorf, Hamburg, Germany.
| | - Katja E Brückner
- Epilepsy Center Hamburg, Protestant Hospital Alsterdorf, Hamburg, Germany
| | - Celina Badenius
- Epilepsy Center Hamburg, Protestant Hospital Alsterdorf, Hamburg, Germany
| | - Wolfgang Hamel
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Miriam Schaper
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Michel Le Van Quyen
- Laboratoire d'Imagerie Biomédicale (LIB), Inserm U1146 / Sorbonne Université UMCR2 / UMR7371 CNRS, Paris, France
| | | | | | - Jonas M Hebel
- Department of Neurology, Charité-University Medicine Berlin, Berlin, Germany
| | - Michael Lanz
- Epilepsy Center Hamburg, Protestant Hospital Alsterdorf, Hamburg, Germany
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5
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Axelrod V, Rozier C, Malkinson TS, Lehongre K, Adam C, Lambrecq V, Navarro V, Naccache L. Face-selective multi-unit activity in the proximity of the FFA modulated by facial expression stimuli. Neuropsychologia 2022; 170:108228. [DOI: 10.1016/j.neuropsychologia.2022.108228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 02/13/2022] [Accepted: 03/23/2022] [Indexed: 01/02/2023]
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6
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Abstract
Neural oscillations play an important role in the integration and segregation of brain regions that are important for brain functions, including pain. Disturbances in oscillatory activity are associated with several disease states, including chronic pain. Studies of neural oscillations related to pain have identified several functional bands, especially alpha, beta, and gamma bands, implicated in nociceptive processing. In this review, we introduce several properties of neural oscillations that are important to understand the role of brain oscillations in nociceptive processing. We also discuss the role of neural oscillations in the maintenance of efficient communication in the brain. Finally, we discuss the role of neural oscillations in healthy and chronic pain nociceptive processing. These data and concepts illustrate the key role of regional and interregional neural oscillations in nociceptive processing underlying acute and chronic pains.
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Affiliation(s)
- Junseok A. Kim
- Division of Brain, Imaging and Behaviour, Krembil Brain Institute, Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Karen D. Davis
- Division of Brain, Imaging and Behaviour, Krembil Brain Institute, Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
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7
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Conson M, Cecere R, Baiano C, De Bellis F, Forgione G, Zappullo I, Trojano L. Implicit Motor Imagery and the Lateral Occipitotemporal Cortex: Hints for Tailoring Non-Invasive Brain Stimulation. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17165851. [PMID: 32806702 PMCID: PMC7459529 DOI: 10.3390/ijerph17165851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 12/13/2022]
Abstract
Background: Recent evidence has converged in showing that the lateral occipitotemporal cortex is over-recruited during implicit motor imagery in elderly and in patients with neurodegenerative disorders, such as Parkinson’s disease. These data suggest that when automatically imaging movements, individuals exploit neural resources in the visual areas to compensate for the decline in activating motor representations. Thus, the occipitotemporal cortex could represent a cortical target of non-invasive brain stimulation combined with cognitive training to enhance motor imagery performance. Here, we aimed at shedding light on the role of the left and right lateral occipitotemporal cortex in implicit motor imagery. Methods: We applied online, high-frequency, repetitive transcranial magnetic stimulation (rTMS) over the left and right lateral occipitotemporal cortex while healthy right-handers judged the laterality of hand images. Results: With respect to the sham condition, left hemisphere stimulation specifically reduced accuracy in judging the laterality of right-hand images. Instead, the hallmark of motor simulation, i.e., the biomechanical effect, was never influenced by rTMS. Conclusions: The lateral occipitotemporal cortex seems to be involved in mental representation of the dominant hand, at least in right-handers, but not in reactivating sensorimotor information during simulation. These findings provide useful hints for developing combined brain stimulation and behavioural trainings to improve motor imagery.
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Affiliation(s)
- Massimiliano Conson
- Laboratory of Developmental Neuropsychology, Department of Psychology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; (R.C.); (C.B.); (G.F.); (I.Z.)
- Correspondence: ; Tel.: +39-08-2327-5327
| | - Roberta Cecere
- Laboratory of Developmental Neuropsychology, Department of Psychology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; (R.C.); (C.B.); (G.F.); (I.Z.)
| | - Chiara Baiano
- Laboratory of Developmental Neuropsychology, Department of Psychology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; (R.C.); (C.B.); (G.F.); (I.Z.)
| | - Francesco De Bellis
- Laboratory of Neuropsychology, Department of Psychology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; (F.D.B.); (L.T.)
| | - Gabriela Forgione
- Laboratory of Developmental Neuropsychology, Department of Psychology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; (R.C.); (C.B.); (G.F.); (I.Z.)
| | - Isa Zappullo
- Laboratory of Developmental Neuropsychology, Department of Psychology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; (R.C.); (C.B.); (G.F.); (I.Z.)
| | - Luigi Trojano
- Laboratory of Neuropsychology, Department of Psychology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; (F.D.B.); (L.T.)
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8
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Intracranial Recordings Reveal Unique Shape and Timing of Responses in Human Visual Cortex during Illusory Visual Events. Curr Biol 2020; 30:3089-3100.e4. [PMID: 32619489 DOI: 10.1016/j.cub.2020.05.082] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 05/01/2020] [Accepted: 05/27/2020] [Indexed: 02/06/2023]
Abstract
During binocular rivalry, perception spontaneously changes without any alteration to the visual stimulus. What neural events bring about this illusion that a constant stimulus is changing? We recorded from intracranial electrodes placed on the occipital and posterior temporal cortex of two patients with epilepsy while they experienced illusory changes of a face-house binocular-rivalry stimulus or observed a control stimulus that physically changed. We performed within-patient comparisons of broadband high-frequency responses, focusing on single epochs recorded along the ventral processing stream. We found transient face- and house-selective responses localized to the same electrodes for illusory and physical changes, but the temporal characteristics of these responses markedly differed. In comparison with physical changes, responses to illusory changes were longer lasting, in particular exhibiting a characteristic slow rise. Furthermore, the temporal order of responses across the visual hierarchy was reversed for illusory as compared to physical changes: for illusory changes, higher order fusiform and parahippocampal regions responded before lower order occipital regions. Our tentative interpretation of these findings is that two stages underlie the initiation of illusory changes: a destabilization stage in which activity associated with the impending change gradually accumulates across the visual hierarchy, ultimately graduating in a top-down cascade of activity that may stabilize the new perceptual interpretation of the stimulus.
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9
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Gonzalez-Perez M, Wakui E, Thoma V, Nitsche MA, Rivolta D. Transcranial alternating current stimulation (tACS) at 40 Hz enhances face and object perception. Neuropsychologia 2019; 135:107237. [DOI: 10.1016/j.neuropsychologia.2019.107237] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 07/26/2019] [Accepted: 10/20/2019] [Indexed: 01/06/2023]
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10
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Yan X, Liu-Shuang J, Rossion B. Effect of face-related task on rapid individual face discrimination. Neuropsychologia 2019; 129:236-245. [DOI: 10.1016/j.neuropsychologia.2019.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 03/26/2019] [Accepted: 04/09/2019] [Indexed: 01/08/2023]
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11
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Stigliani A, Jeska B, Grill-Spector K. Differential sustained and transient temporal processing across visual streams. PLoS Comput Biol 2019; 15:e1007011. [PMID: 31145723 PMCID: PMC6583966 DOI: 10.1371/journal.pcbi.1007011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 06/19/2019] [Accepted: 04/07/2019] [Indexed: 11/24/2022] Open
Abstract
How do high-level visual regions process the temporal aspects of our visual experience? While the temporal sensitivity of early visual cortex has been studied with fMRI in humans, temporal processing in high-level visual cortex is largely unknown. By modeling neural responses with millisecond precision in separate sustained and transient channels, and introducing a flexible encoding framework that captures differences in neural temporal integration time windows and response nonlinearities, we predict fMRI responses across visual cortex for stimuli ranging from 33 ms to 20 s. Using this innovative approach, we discovered that lateral category-selective regions respond to visual transients associated with stimulus onsets and offsets but not sustained visual information. Thus, lateral category-selective regions compute moment-to-moment visual transitions, but not stable features of the visual input. In contrast, ventral category-selective regions process both sustained and transient components of the visual input. Our model revealed that sustained channel responses to prolonged stimuli exhibit adaptation, whereas transient channel responses to stimulus offsets are surprisingly larger than for stimulus onsets. This large offset transient response may reflect a memory trace of the stimulus when it is no longer visible, whereas the onset transient response may reflect rapid processing of new items. Together, these findings reveal previously unconsidered, fundamental temporal mechanisms that distinguish visual streams in the human brain. Importantly, our results underscore the promise of modeling brain responses with millisecond precision to understand the underlying neural computations. How does the brain encode the timing of our visual experience? Using functional magnetic resonance imaging (fMRI) and a generative temporal model with millisecond resolution, we discovered that visual regions in the lateral and ventral processing streams fundamentally differ in their temporal processing of the visual input. Regions in lateral temporal cortex process visual transients associated with the beginning and ending of the stimulus, but not its stable aspects. That is, lateral regions appear to compute moment-to-moment changes in the visual input. In contrast, regions in ventral temporal cortex process both stable and transient components of the visual input, even as the response to the former exhibits adaptation. Surprisingly, the model predicts that in ventral regions responses to stimulus endings are larger than beginnings. We suggest that ending responses may reflect a memory trace of the stimulus, when it is no longer visible, and the beginning responses may reflect processing of new inputs. Together, these findings (i) reveal a fundamental temporal mechanism that distinguishes visual streams and (ii) highlight both the importance and utility of modeling brain responses with millisecond precision to understand the temporal dynamics of neural computations in the human brain.
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Affiliation(s)
- Anthony Stigliani
- Psychology Department, Stanford University, Stanford, California, United States of America
| | - Brianna Jeska
- Psychology Department, Stanford University, Stanford, California, United States of America
| | - Kalanit Grill-Spector
- Psychology Department, Stanford University, Stanford, California, United States of America
- Stanford Neurosciences Institute, Stanford University, Stanford, California, United States of America
- * E-mail:
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12
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Schneider TR, Hipp JF, Domnick C, Carl C, Büchel C, Engel AK. Modulation of neuronal oscillatory activity in the beta- and gamma-band is associated with current individual anxiety levels. Neuroimage 2018; 178:423-434. [DOI: 10.1016/j.neuroimage.2018.05.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/17/2018] [Accepted: 05/25/2018] [Indexed: 01/23/2023] Open
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13
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Shehzad Z, McCarthy G. Category representations in the brain are both discretely localized and widely distributed. J Neurophysiol 2018; 119:2256-2264. [PMID: 29537922 PMCID: PMC6032110 DOI: 10.1152/jn.00912.2017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/05/2018] [Accepted: 03/05/2018] [Indexed: 11/22/2022] Open
Abstract
Whether category information is discretely localized or represented widely in the brain remains a contentious issue. Initial functional MRI studies supported the localizationist perspective that category information is represented in discrete brain regions. More recent fMRI studies using machine learning pattern classification techniques provide evidence for widespread distributed representations. However, these latter studies have not typically accounted for shared information. Here, we find strong support for distributed representations when brain regions are considered separately. However, localized representations are revealed by using analytical methods that separate unique from shared information among brain regions. The distributed nature of shared information and the localized nature of unique information suggest that brain connectivity may encourage spreading of information but category-specific computations are carried out in distinct domain-specific regions. NEW & NOTEWORTHY Whether visual category information is localized in unique domain-specific brain regions or distributed in many domain-general brain regions is hotly contested. We resolve this debate by using multivariate analyses to parse functional MRI signals from different brain regions into unique and shared variance. Our findings support elements of both models and show information is initially localized and then shared among other regions leading to distributed representations being observed.
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Affiliation(s)
- Zarrar Shehzad
- Department of Psychology, Yale University , New Haven, Connecticut
| | - Gregory McCarthy
- Department of Psychology, Yale University , New Haven, Connecticut
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14
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Weiner KS, Barnett MA, Witthoft N, Golarai G, Stigliani A, Kay KN, Gomez J, Natu VS, Amunts K, Zilles K, Grill-Spector K. Defining the most probable location of the parahippocampal place area using cortex-based alignment and cross-validation. Neuroimage 2018; 170:373-384. [PMID: 28435097 PMCID: PMC6330657 DOI: 10.1016/j.neuroimage.2017.04.040] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 04/17/2017] [Indexed: 01/28/2023] Open
Abstract
The parahippocampal place area (PPA) is a widely studied high-level visual region in the human brain involved in place and scene processing. The goal of the present study was to identify the most probable location of place-selective voxels in medial ventral temporal cortex. To achieve this goal, we first used cortex-based alignment (CBA) to create a probabilistic place-selective region of interest (ROI) from one group of 12 participants. We then tested how well this ROI could predict place selectivity in each hemisphere within a new group of 12 participants. Our results reveal that a probabilistic ROI (pROI) generated from one group of 12 participants accurately predicts the location and functional selectivity in individual brains from a new group of 12 participants, despite between subject variability in the exact location of place-selective voxels relative to the folding of parahippocampal cortex. Additionally, the prediction accuracy of our pROI is significantly higher than that achieved by volume-based Talairach alignment. Comparing the location of the pROI of the PPA relative to published data from over 500 participants, including data from the Human Connectome Project, shows a striking convergence of the predicted location of the PPA and the cortical location of voxels exhibiting the highest place selectivity across studies using various methods and stimuli. Specifically, the most predictive anatomical location of voxels exhibiting the highest place selectivity in medial ventral temporal cortex is the junction of the collateral and anterior lingual sulci. Methodologically, we make this pROI freely available (vpnl.stanford.edu/PlaceSelectivity), which provides a means to accurately identify a functional region from anatomical MRI data when fMRI data are not available (for example, in patient populations). Theoretically, we consider different anatomical and functional factors that may contribute to the consistent anatomical location of place selectivity relative to the folding of high-level visual cortex.
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Affiliation(s)
- Kevin S Weiner
- Department of Psychology, Stanford University, Stanford, CA 94305, United States.
| | - Michael A Barnett
- Department of Psychology, Stanford University, Stanford, CA 94305, United States
| | - Nathan Witthoft
- Department of Psychology, Stanford University, Stanford, CA 94305, United States
| | - Golijeh Golarai
- Department of Psychology, Stanford University, Stanford, CA 94305, United States
| | - Anthony Stigliani
- Department of Psychology, Stanford University, Stanford, CA 94305, United States
| | - Kendrick N Kay
- Department of Radiology, University of Minnesota, Minneapolis, MN 55455, United States
| | - Jesse Gomez
- Stanford Neurosciences Program, Stanford University School of Medicine, Stanford, CA 94305, United States
| | - Vaidehi S Natu
- Department of Psychology, Stanford University, Stanford, CA 94305, United States
| | - Katrin Amunts
- Institute of Neurosciences and Medicine (INM-1), Research Centre Jülich, Jülich, Germany; C. & O. Vogt Institute for Brain Research, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany; JARA-BRAIN, Jülich-Aachen Research Alliance, Jülich, Germany
| | - Karl Zilles
- Institute of Neurosciences and Medicine (INM-1), Research Centre Jülich, Jülich, Germany; Dept. of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen, Germany; JARA-BRAIN, Jülich-Aachen Research Alliance, Jülich, Germany
| | - Kalanit Grill-Spector
- Department of Psychology, Stanford University, Stanford, CA 94305, United States; Stanford Neurosciences Institute, Stanford University, Stanford, CA 94305, United States
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15
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Prior Expectation Modulates Repetition Suppression without Perceptual Awareness. Sci Rep 2018; 8:5055. [PMID: 29568041 PMCID: PMC5864919 DOI: 10.1038/s41598-018-23467-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 03/13/2018] [Indexed: 11/23/2022] Open
Abstract
Stimulus repetition induces attenuated brain responses. This phenomenon, termed repetition suppression (RS), is classically held to stem from bottom-up neuronal adaptation. However, recent studies suggest that RS is driven by top-down predictive mechanisms. It remains controversial whether these top-down mechanisms of RS rely on conscious strategies, or if they represent a more fundamental aspect of perception, coding for physical properties of the repeated feature. The presence of top-down effects in the absence of perceptual awareness would indicate that conscious strategies are not sufficient to explain top-down mechanisms of RS. We combined an unconscious priming paradigm with EEG recordings and tested whether RS can be modulated by the probability of encountering a repetition, even in the absence of awareness. Our results show that both behavioural priming and RS near occipital areas are modulated by repetition probability, regardless of prime awareness. This contradicts previous findings that have argued that RS modulation is a by-product of conscious strategies. In contrast, we found that the increase in theta-band power following unrepeated trials – an index of conflict detection – is modulated only by expectations during conscious primes, implicating the use of conscious strategies. Together, our results suggest that the influence of predictions on RS can be either automatic in sensory brain regions or dependent on conscious strategies.
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Engell AD, Kim NY, McCarthy G. Sensitivity to Faces with Typical and Atypical Part Configurations within Regions of the Face-processing Network: An fMRI Study. J Cogn Neurosci 2018; 30:963-972. [PMID: 29561238 DOI: 10.1162/jocn_a_01255] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Perception of faces has been shown to engage a domain-specific set of brain regions, including the occipital face area (OFA) and the fusiform face area (FFA). It is commonly held that the OFA is responsible for the detection of faces in the environment, whereas the FFA is responsible for processing the identity of the face. However, an alternative model posits that the FFA is responsible for face detection and subsequently recruits the OFA to analyze the face parts in the service of identification. An essential prediction of the former model is that the OFA is not sensitive to the arrangement of internal face parts. In the current fMRI study, we test the sensitivity of the OFA and FFA to the configuration of face parts. Participants were shown faces in which the internal parts were presented in a typical configuration (two eyes above a nose above a mouth) or in an atypical configuration (the locations of individual parts were shuffled within the face outline). Perception of the atypical faces evoked a significantly larger response than typical faces in the OFA and in a wide swath of the surrounding posterior occipitotemporal cortices. Surprisingly, typical faces did not evoke a significantly larger response than atypical faces anywhere in the brain, including the FFA (although some subthreshold differences were observed). We propose that face processing in the FFA results in inhibitory sculpting of activation in the OFA, which accounts for this region's weaker response to typical than to atypical configurations.
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Quek G, Nemrodov D, Rossion B, Liu-Shuang J. Selective Attention to Faces in a Rapid Visual Stream: Hemispheric Differences in Enhancement and Suppression of Category-selective Neural Activity. J Cogn Neurosci 2018; 30:393-410. [DOI: 10.1162/jocn_a_01220] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In daily life, efficient perceptual categorization of faces occurs in dynamic and highly complex visual environments. Yet the role of selective attention in guiding face categorization has predominantly been studied under sparse and static viewing conditions, with little focus on disentangling the impact of attentional enhancement and suppression. Here we show that attentional enhancement and suppression exert a differential impact on face categorization supported by the left and right hemispheres. We recorded 128-channel EEG while participants viewed a 6-Hz stream of object images (buildings, animals, objects, etc.) with a face image embedded as every fifth image (i.e., OOOOFOOOOFOOOOF…). We isolated face-selective activity by measuring the response at the face presentation frequency (i.e., 6 Hz/5 = 1.2 Hz) under three conditions: Attend Faces, in which participants monitored the sequence for instances of female faces; Attend Objects, in which they responded to instances of guitars; and Baseline, in which they performed an orthogonal task on the central fixation cross. During the orthogonal task, face-specific activity was predominantly centered over the right occipitotemporal region. Actively attending to faces enhanced face-selective activity much more evidently in the left hemisphere than in the right, whereas attending to objects suppressed the face-selective response in both hemispheres to a comparable extent. In addition, the time courses of attentional enhancement and suppression did not overlap. These results suggest the left and right hemispheres support face-selective processing in distinct ways—where the right hemisphere is mandatorily engaged by faces and the left hemisphere is more flexibly recruited to serve current tasks demands.
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Furl N, Lohse M, Pizzorni-Ferrarese F. Low-frequency oscillations employ a general coding of the spatio-temporal similarity of dynamic faces. Neuroimage 2017; 157:486-499. [PMID: 28619657 PMCID: PMC6390175 DOI: 10.1016/j.neuroimage.2017.06.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 06/01/2017] [Accepted: 06/09/2017] [Indexed: 12/14/2022] Open
Abstract
Brain networks use neural oscillations as information transfer mechanisms. Although the face perception network in occipitotemporal cortex is well-studied, contributions of oscillations to face representation remain an open question. We tested for links between oscillatory responses that encode facial dimensions and the theoretical proposal that faces are encoded in similarity-based "face spaces". We quantified similarity-based encoding of dynamic faces in magnetoencephalographic sensor-level oscillatory power for identity, expression, physical and perceptual similarity of facial form and motion. Our data show that evoked responses manifest physical and perceptual form similarity that distinguishes facial identities. Low-frequency induced oscillations (< 20Hz) manifested more general similarity structure, which was not limited to identity, and spanned physical and perceived form and motion. A supplementary fMRI-constrained source reconstruction implicated fusiform gyrus and V5 in this similarity-based representation. These findings introduce a potential link between "face space" encoding and oscillatory network communication, which generates new hypotheses about the potential oscillation-mediated mechanisms that might encode facial dimensions.
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Affiliation(s)
- Nicholas Furl
- Department of Psychology, Royal Holloway, University of London, Surrey TW20 0EX, United Kingdom; Cognition and Brain Sciences Unit, Medical Research Council, Cambridge CB2 7EF, United Kingdom.
| | - Michael Lohse
- Cognition and Brain Sciences Unit, Medical Research Council, Cambridge CB2 7EF, United Kingdom; Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford OX1 3QX, United Kingdom
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Whose hand is this? Differential responses of right and left extrastriate body areas to visual images of self and others’ hands. COGNITIVE AFFECTIVE & BEHAVIORAL NEUROSCIENCE 2017; 17:826-837. [DOI: 10.3758/s13415-017-0514-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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A brief historical perspective on the advent of brain oscillations in the biological and psychological disciplines. Neurosci Biobehav Rev 2017; 75:335-347. [DOI: 10.1016/j.neubiorev.2016.12.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 12/09/2016] [Accepted: 12/09/2016] [Indexed: 11/20/2022]
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21
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Kopal J, Vyšata O, Burian J, Schätz M, Procházka A, Vališ M. EEG Synchronizations Length During Meditation. J Med Biol Eng 2017. [DOI: 10.1007/s40846-017-0219-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Braboszcz C, Cahn BR, Levy J, Fernandez M, Delorme A. Increased Gamma Brainwave Amplitude Compared to Control in Three Different Meditation Traditions. PLoS One 2017; 12:e0170647. [PMID: 28118405 PMCID: PMC5261734 DOI: 10.1371/journal.pone.0170647] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 12/22/2016] [Indexed: 11/24/2022] Open
Abstract
Despite decades of research, effects of different types of meditation on electroencephalographic (EEG) activity are still being defined. We compared practitioners of three different meditation traditions (Vipassana, Himalayan Yoga and Isha Shoonya) with a control group during a meditative and instructed mind-wandering (IMW) block. All meditators showed higher parieto-occipital 60–110 Hz gamma amplitude than control subjects as a trait effect observed during meditation and when considering meditation and IMW periods together. Moreover, this gamma power was positively correlated with participants meditation experience. Independent component analysis was used to show that gamma activity did not originate in eye or muscle artifacts. In addition, we observed higher 7–11 Hz alpha activity in the Vipassana group compared to all the other groups during both meditation and instructed mind wandering and lower 10–11 Hz activity in the Himalayan yoga group during meditation only. We showed that meditation practice is correlated to changes in the EEG gamma frequency range that are common to a variety of meditation practices.
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Affiliation(s)
- Claire Braboszcz
- Université de Toulouse, UPS, Centre de Recherche Cerveau et Cognition, Toulouse, France
- CerCo, CNRS UMR5549, Toulouse, France
- * E-mail:
| | - B. Rael Cahn
- University of Southern California Department of Psychiatry, Los Angeles, California, United States of America
- University of Southern California Brain and Creativity Institute, Los Angeles, California, United States of America
| | | | - Manuel Fernandez
- Meditation Research Institute, Swami Rama Sadhaka Grama, Rishikesh, India
| | - Arnaud Delorme
- Université de Toulouse, UPS, Centre de Recherche Cerveau et Cognition, Toulouse, France
- CerCo, CNRS UMR5549, Toulouse, France
- Swartz Center for Computational Neuroscience, University of California San Diego, La Jolla, California, United States of America
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Chand GB, Lamichhane B, Dhamala M. Face or House Image Perception: Beta and Gamma Bands of Oscillations in Brain Networks Carry Out Decision-Making. Brain Connect 2016; 6:621-631. [PMID: 27417452 DOI: 10.1089/brain.2016.0421] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Previous functional magnetic resonance imaging studies have consistently shown that perception of visual objects, such as faces and houses, involves distributed brain networks that include the fusiform face area (FFA), parahippocampal place area (PPA), and dorsolateral prefrontal cortex (DLPFC). These regions are commonly observed to be coactivated in BOLD measurements during perception of visual objects. In this study, we aimed to disentangle node-level and network-level activities in millisecond timescale of perception and decision-making in attempts to answer questions about timing and frequency of brain oscillatory activities. We used clear and noisy face-house image categorization tasks and human scalp electroencephalography recordings combined with source reconstruction techniques to study when and how oscillatory activity organizes within the FFA, PPA, and DLPFC. We uncovered the dynamics of two oscillatory networks-beta (13-30 Hz) and gamma (30-100 Hz). In beta band, the node and network activities were enhanced in time frame of 125-250 msec after stimulus onset, the FFA and PPA acted as main outflow hubs and the DLPFC as a main inflow hub, and network activities negatively correlated with behavior measures of noise levels (response times). In gamma band, node and network activities were elevated in time frame of 0-125 msec after stimulus onset, the DLPFC acted as a main outflow hub, and finally network activities were positively correlated with the noise level. These findings broaden our understanding of temporal evolution of node and network features associated with visual perceptual decision-making.
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Affiliation(s)
- Ganesh B Chand
- 1 Department of Physics and Astronomy, Georgia State University , Atlanta, Georgia
| | - Bidhan Lamichhane
- 1 Department of Physics and Astronomy, Georgia State University , Atlanta, Georgia
| | - Mukesh Dhamala
- 1 Department of Physics and Astronomy, Georgia State University , Atlanta, Georgia .,2 Neuroscience Institute, Georgia State University , Atlanta, Georgia .,3 Center for Behavioral Neuroscience, Center for Nano-Optics, Center for Diagnostics and Therapeutics, GSU-GaTech Center for Advanced Brain Imaging, Georgia State University , Atlanta, Georgia
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24
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Kim NY, McCarthy G. Task influences pattern discriminability for faces and bodies in ventral occipitotemporal cortex. Soc Neurosci 2016; 11:627-36. [PMID: 26787515 DOI: 10.1080/17470919.2015.1131194] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Our prior research showed that faces and bodies activate overlapping regions of the ventral occipitotemporal cortex (VOTC). However, faces and bodies were nonetheless discriminable in these same overlapping regions when their spatial patterns of activity were classified using multivoxel pattern analysis (MVPA). Here we investigated whether these spatial patterns and their time courses were influenced by different categorization tasks. Participants viewed pictures of faces or headless bodies depicting a happy or fearful emotion. In one task, they categorized the picture as a face or a body regardless of emotion. In the other task, they categorized the emotion regardless of whether it was depicted by a face or body. Using a classifier trained on independent data, we found higher face-body classification accuracy for the emotion categorization task. The classifier was applied to each post-stimulus time-point to characterize the temporal course of classification. Accuracy initially rose equivalently above chance for both tasks, but then increased over a longer duration when participants categorized emotions. Thus, the temporal course of pattern differences between faces and bodies in VOTC was modulated by the behavioral goal of the observer, suggesting the top-down modulatory effect of task context on the category-selectivity activity in the VOTC.
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Affiliation(s)
- Na Yeon Kim
- a Department of Psychology , Yale University , New Haven , CT , USA
| | - Gregory McCarthy
- a Department of Psychology , Yale University , New Haven , CT , USA
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25
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Lamichhane B, Dhamala M. Perceptual decision-making difficulty modulates feedforward effective connectivity to the dorsolateral prefrontal cortex. Front Hum Neurosci 2015; 9:498. [PMID: 26441596 PMCID: PMC4563775 DOI: 10.3389/fnhum.2015.00498] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 08/27/2015] [Indexed: 11/13/2022] Open
Abstract
Diverse cortical structures are known to coordinate activity as a network in relaying and processing of visual information to discriminate visual objects. However, how this discrimination is achieved is still largely unknown. To contribute to answering this question, we used face-house categorization tasks with three levels of noise in face and house images in functional magnetic resonance imaging (fMRI) experiments involving thirty-three participants. The behavioral performance error and response time (RT) were correlated with noise in face-house images. We then built dynamical causal models (DCM) of fMRI blood-oxygenation level dependent (BOLD) signals from the face and house category-specific regions in ventral temporal (VT) cortex, the fusiform face area (FFA) and parahippocampal place area (PPA), and the dorsolateral prefrontal cortex (dlPFC). We found a strong feed-forward intrinsic connectivity pattern from FFA and PPA to dlPFC. Importantly, the feed-forward connectivity to dlPFC was significantly modulated by the perception of both faces and houses. The dlPFC-BOLD activity, the connectivity from FFA and PPA to the dlPFC all increased with noise level. These results suggest that the FFA-PPA-dlPFC network plays an important role for relaying and integrating competing sensory information to arrive at perceptual decisions.
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Affiliation(s)
- Bidhan Lamichhane
- Department of Physics and Astronomy, Georgia State University Atlanta, GA, USA
| | - Mukesh Dhamala
- Department of Physics and Astronomy, Georgia State University Atlanta, GA, USA ; Center for Behavioral Neuroscience, Neuroscience Institute, Georgia State University Atlanta, GA, USA ; Center for Nano-Optics, Georgia State University Atlanta, GA, USA ; Center for Diagnostics and Therapeutics, Georgia State University Atlanta, GA, USA
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26
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Kadipasaoglu CM, Forseth K, Whaley M, Conner CR, Rollo MJ, Baboyan VG, Tandon N. Development of grouped icEEG for the study of cognitive processing. Front Psychol 2015; 6:1008. [PMID: 26257673 PMCID: PMC4508923 DOI: 10.3389/fpsyg.2015.01008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 07/06/2015] [Indexed: 11/21/2022] Open
Abstract
Invasive intracranial EEG (icEEG) offers a unique opportunity to study human cognitive networks at an unmatched spatiotemporal resolution. To date, the contributions of icEEG have been limited to the individual-level analyses or cohorts whose data are not integrated in any way. Here we discuss how grouped approaches to icEEG overcome challenges related to sparse-sampling, correct for individual variations in response and provide statistically valid models of brain activity in a population. By the generation of whole-brain activity maps, grouped icEEG enables the study of intra and interregional dynamics between distributed cortical substrates exhibiting task-dependent activity. In this fashion, grouped icEEG analyses can provide significant advances in understanding the mechanisms by which cortical networks give rise to cognitive functions.
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Affiliation(s)
- Cihan M Kadipasaoglu
- Vivian Smith Department of Neurosurgery, University of Texas Health Science Center at Houston Houston, TX, USA
| | - Kiefer Forseth
- Vivian Smith Department of Neurosurgery, University of Texas Health Science Center at Houston Houston, TX, USA
| | - Meagan Whaley
- Vivian Smith Department of Neurosurgery, University of Texas Health Science Center at Houston Houston, TX, USA ; Department of Computational and Applied Mathematics, Rice University Houston, TX, USA
| | - Christopher R Conner
- Vivian Smith Department of Neurosurgery, University of Texas Health Science Center at Houston Houston, TX, USA
| | - Matthew J Rollo
- Vivian Smith Department of Neurosurgery, University of Texas Health Science Center at Houston Houston, TX, USA
| | - Vatche G Baboyan
- Vivian Smith Department of Neurosurgery, University of Texas Health Science Center at Houston Houston, TX, USA
| | - Nitin Tandon
- Vivian Smith Department of Neurosurgery, University of Texas Health Science Center at Houston Houston, TX, USA ; Texas Medical Center, Mischer Neuroscience Institute, Memorial Hermann Hospital Houston, TX, USA
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27
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Matsuzaki N, Schwarzlose RF, Nishida M, Ofen N, Asano E. Upright face-preferential high-gamma responses in lower-order visual areas: evidence from intracranial recordings in children. Neuroimage 2015; 109:249-59. [PMID: 25579446 DOI: 10.1016/j.neuroimage.2015.01.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 11/30/2014] [Accepted: 01/05/2015] [Indexed: 11/18/2022] Open
Abstract
Behavioral studies demonstrate that a face presented in the upright orientation attracts attention more rapidly than an inverted face. Saccades toward an upright face take place in 100-140 ms following presentation. The present study using electrocorticography determined whether upright face-preferential neural activation, as reflected by augmentation of high-gamma activity at 80-150 Hz, involved the lower-order visual cortex within the first 100 ms post-stimulus presentation. Sampled lower-order visual areas were verified by the induction of phosphenes upon electrical stimulation. These areas resided in the lateral-occipital, lingual, and cuneus gyri along the calcarine sulcus, roughly corresponding to V1 and V2. Measurement of high-gamma augmentation during central (circular) and peripheral (annular) checkerboard reversal pattern stimulation indicated that central-field stimuli were processed by the more polar surface whereas peripheral-field stimuli by the more anterior medial surface. Upright face stimuli, compared to inverted ones, elicited up to 23% larger augmentation of high-gamma activity in the lower-order visual regions at 40-90 ms. Upright face-preferential high-gamma augmentation was more highly correlated with high-gamma augmentation for central than peripheral stimuli. Our observations are consistent with the hypothesis that lower-order visual regions, especially those for the central field, are involved in visual cues for rapid detection of upright face stimuli.
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Affiliation(s)
- Naoyuki Matsuzaki
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit Medical Center, Detroit, MI 48201, USA
| | - Rebecca F Schwarzlose
- Institute of Gerontology, Wayne State University, Detroit, MI, USA; Trends in Cognitive Sciences, Cell Press, Cambridge, MA 02139, USA
| | - Masaaki Nishida
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit Medical Center, Detroit, MI 48201, USA; Department of Anesthesiology, Hanyu General Hospital, Hanyu City, Saitama 348-8505, Japan
| | - Noa Ofen
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit Medical Center, Detroit, MI 48201, USA; Institute of Gerontology, Wayne State University, Detroit, MI, USA
| | - Eishi Asano
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit Medical Center, Detroit, MI 48201, USA; Department of Neurology, Children's Hospital of Michigan, Wayne State University, Detroit Medical Center, Detroit, MI 48201, USA.
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28
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Hietanen JK, Kirjavainen I, Nummenmaa L. Additive effects of affective arousal and top-down attention on the event-related brain responses to human bodies. Biol Psychol 2014; 103:167-75. [DOI: 10.1016/j.biopsycho.2014.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 08/22/2014] [Accepted: 09/07/2014] [Indexed: 10/24/2022]
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Electrical stimulation of the left and right human fusiform gyrus causes different effects in conscious face perception. J Neurosci 2014; 34:12828-36. [PMID: 25232118 DOI: 10.1523/jneurosci.0527-14.2014] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Neuroimaging and electrophysiological studies across species have confirmed bilateral face-selective responses in the ventral temporal cortex (VTC) and prosopagnosia is reported in patients with lesions in the VTC including the fusiform gyrus (FG). As imaging and electrophysiological studies provide correlative evidence, and brain lesions often comprise both white and gray matter structures beyond the FG, we designed the current study to explore the link between face-related electrophysiological responses in the FG and the causal effects of electrical stimulation of the left or right FG in face perception. We used a combination of electrocorticography (ECoG) and electrical brain stimulation (EBS) in 10 human subjects implanted with intracranial electrodes in either the left (5 participants, 30 FG sites) or right (5 participants, 26 FG sites) hemispheres. We identified FG sites with face-selective ECoG responses, and recorded perceptual reports during EBS of these sites. In line with existing literature, face-selective ECoG responses were present in both left and right FG sites. However, when the same sites were stimulated, we observed a striking difference between hemispheres. Only EBS of the right FG caused changes in the conscious perception of faces, whereas EBS of strongly face-selective regions in the left FG produced non-face-related visual changes, such as phosphenes. This study examines the relationship between correlative versus causal nature of ECoG and EBS, respectively, and provides important insight into the differential roles of the right versus left FG in conscious face perception.
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30
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Engell AD, McCarthy G. Face, eye, and body selective responses in fusiform gyrus and adjacent cortex: an intracranial EEG study. Front Hum Neurosci 2014; 8:642. [PMID: 25191255 PMCID: PMC4139958 DOI: 10.3389/fnhum.2014.00642] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 08/02/2014] [Indexed: 11/16/2022] Open
Abstract
Functional MRI (fMRI) studies have investigated the degree to which processing of whole faces, face-parts, and bodies are differentially localized within the fusiform gyrus and adjacent ventral occipitotemporal cortex. While some studies have emphasized the spatial differentiation of processing into discrete areas, others have emphasized the overlap of processing and the importance of distributed patterns of activity. Intracranial EEG (iEEG) recorded from subdural electrodes provides excellent temporal and spatial resolution of local neural activity, and thus provides an alternative method to fMRI for studying differences and commonalities in face and body processing. In this study we recorded iEEG from 12 patients while they viewed images of novel faces, isolated eyes, headless bodies, and flowers. Event-related potential analysis identified 69 occipitotemporal sites at which there was a face-, eye-, or body-selective response when contrasted to flowers. However, when comparing faces, eyes, and bodies to each other at these sites, we identified only 3 face-specific, 13 eye-specific, and 1 body-specific electrodes. Thus, at the majority of sites, faces, eyes, and bodies evoked similar responses. However, we identified ten locations at which the amplitude of the responses spatially varied across adjacent electrodes, indicating that the configuration of current sources and sinks were different for faces, eyes, and bodies. Our results also demonstrate that eye-sensitive regions are more abundant and more purely selective than face- or body-sensitive regions, particularly in lateral occipitotemporal cortex.
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Affiliation(s)
- Andrew D Engell
- Kenyon Psychological Neuroscience Laboratory, Department of Psychology, Kenyon College Gambier, OH, USA
| | - Gregory McCarthy
- Human Neuroscience Laboratory, Department of Psychology, Yale University New Haven, CT, USA
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31
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Steullet P, Cabungcal JH, Cuénod M, Do KQ. Fast oscillatory activity in the anterior cingulate cortex: dopaminergic modulation and effect of perineuronal net loss. Front Cell Neurosci 2014; 8:244. [PMID: 25191228 PMCID: PMC4139002 DOI: 10.3389/fncel.2014.00244] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 08/01/2014] [Indexed: 11/23/2022] Open
Abstract
Dopamine release in the prefrontal cortex plays a critical role in cognitive function such as working memory, attention and planning. Dopamine exerts complex modulation on excitability of pyramidal neurons and interneurons, and regulates excitatory and inhibitory synaptic transmission. Because of the complexity of this modulation, it is difficult to fully comprehend the effect of dopamine on neuronal network activity. In this study, we investigated the effect of dopamine on local high-frequency oscillatory neuronal activity (in β band) in slices of the mouse anterior cingulate cortex (ACC). We found that dopamine enhanced the power of these oscillations induced by kainate and carbachol, but did not affect their peak frequency. Activation of D2R and in a lesser degree D1R increased the oscillation power, while activation of D4R had no effect. These high-frequency oscillations in the ACC relied on both phasic inhibitory and excitatory transmission and functional gap junctions. Thus, dopamine released in the ACC promotes high-frequency synchronized local cortical activity which is known to favor information transfer, fast selection and binding of distributed neuronal responses. Finally, the power of these oscillations was significantly enhanced after degradation of the perineuronal nets (PNNs) enwrapping most parvalbumin interneurons. This study provides new insights for a better understanding of the abnormal prefrontal gamma activity in schizophrenia (SZ) patients who display prefrontal anomalies of both the dopaminergic system and the PNNs.
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Affiliation(s)
- Pascal Steullet
- Department of Psychiatry, Center of Psychiatric Neuroscience, Centre Hospitalier Universitaire Vaudois and University of Lausanne Prilly-Lausanne, Switzerland
| | - Jan-Harry Cabungcal
- Department of Psychiatry, Center of Psychiatric Neuroscience, Centre Hospitalier Universitaire Vaudois and University of Lausanne Prilly-Lausanne, Switzerland
| | - Michel Cuénod
- Department of Psychiatry, Center of Psychiatric Neuroscience, Centre Hospitalier Universitaire Vaudois and University of Lausanne Prilly-Lausanne, Switzerland
| | - Kim Q Do
- Department of Psychiatry, Center of Psychiatric Neuroscience, Centre Hospitalier Universitaire Vaudois and University of Lausanne Prilly-Lausanne, Switzerland
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32
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Kim NY, Lee SM, Erlendsdottir MC, McCarthy G. Discriminable spatial patterns of activation for faces and bodies in the fusiform gyrus. Front Hum Neurosci 2014; 8:632. [PMID: 25177286 PMCID: PMC4132375 DOI: 10.3389/fnhum.2014.00632] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 07/29/2014] [Indexed: 11/13/2022] Open
Abstract
Functional neuroimaging studies consistently report that the visual perception of faces and bodies strongly activates regions within ventral occipitotemporal cortex (VOTC) and, in particular, within the mid-lateral fusiform gyrus. One unresolved issue is the degree to which faces and bodies activate discrete or overlapping cortical regions within this region. Here, we examined VOTC activity to faces and bodies at high spatial resolution, using univariate and multivariate analysis approaches sensitive to differences in both the strength and spatial pattern of activation. Faces and bodies evoked substantially overlapping activations in the fusiform gyrus when each was compared to the control category of houses. No discrete regions of activation for faces and bodies in the fusiform gyrus survived a direct statistical comparison using standard univariate statistics. However, multi-voxel pattern analysis differentiated faces and bodies in regions where univariate analysis found no significant difference in the strength of activation. Using a whole-brain multivariate searchlight approach, we also found that extensive regions in VOTC beyond those defined as fusiform face and body areas using standard criteria where the spatial pattern of activation discriminated faces and bodies. These findings provide insights into the spatial distribution of face- and body-specific activations in VOTC and the identification of functionally specialized regions.
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Affiliation(s)
- Na Yeon Kim
- Human Neuroscience Laboratory, Department of Psychology, Yale University New Haven, CT, USA
| | - Su Mei Lee
- Human Neuroscience Laboratory, Department of Psychology, Yale University New Haven, CT, USA
| | | | - Gregory McCarthy
- Human Neuroscience Laboratory, Department of Psychology, Yale University New Haven, CT, USA
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Functional selectivity in the human occipitotemporal cortex during natural vision: Evidence from combined intracranial EEG and eye-tracking. Neuroimage 2014; 95:276-86. [DOI: 10.1016/j.neuroimage.2014.03.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 02/12/2014] [Accepted: 03/10/2014] [Indexed: 11/20/2022] Open
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Dalrymple KA, Davies-Thompson J, Oruc I, Handy TC, Barton JJ, Duchaine B. Spontaneous perceptual facial distortions correlate with ventral occipitotemporal activity. Neuropsychologia 2014; 59:179-91. [DOI: 10.1016/j.neuropsychologia.2014.05.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 05/05/2014] [Accepted: 05/08/2014] [Indexed: 11/27/2022]
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Müsch K, Hamamé CM, Perrone-Bertolotti M, Minotti L, Kahane P, Engel AK, Lachaux JP, Schneider TR. Selective attention modulates high-frequency activity in the face-processing network. Cortex 2014; 60:34-51. [PMID: 25017647 DOI: 10.1016/j.cortex.2014.06.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 03/17/2014] [Accepted: 06/10/2014] [Indexed: 12/01/2022]
Abstract
Face processing depends on the orchestrated activity of a large-scale neuronal network. Its activity can be modulated by attention as a function of task demands. However, it remains largely unknown whether voluntary, endogenous attention and reflexive, exogenous attention to facial expressions equally affect all regions of the face-processing network, and whether such effects primarily modify the strength of the neuronal response, the latency, the duration, or the spectral characteristics. We exploited the good temporal and spatial resolution of intracranial electroencephalography (iEEG) and recorded from depth electrodes to uncover the fast dynamics of emotional face processing. We investigated frequency-specific responses and event-related potentials (ERP) in the ventral occipito-temporal cortex (VOTC), ventral temporal cortex (VTC), anterior insula, orbitofrontal cortex (OFC), and amygdala when facial expressions were task-relevant or task-irrelevant. All investigated regions of interest (ROI) were clearly modulated by task demands and exhibited stronger changes in stimulus-induced gamma band activity (50-150 Hz) when facial expressions were task-relevant. Observed latencies demonstrate that the activation is temporally coordinated across the network, rather than serially proceeding along a processing hierarchy. Early and sustained responses to task-relevant faces in VOTC and VTC corroborate their role for the core system of face processing, but they also occurred in the anterior insula. Strong attentional modulation in the OFC and amygdala (300 msec) suggests that the extended system of the face-processing network is only recruited if the task demands active face processing. Contrary to our expectation, we rarely observed differences between fearful and neutral faces. Our results demonstrate that activity in the face-processing network is susceptible to the deployment of selective attention. Moreover, we show that endogenous attention operates along the whole face-processing network, and that these effects are reflected in frequency-specific changes in the gamma band.
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Affiliation(s)
- Kathrin Müsch
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Carlos M Hamamé
- Laboratoire de Psychologie Cognitive, Aix-Marseille University, Marseille, France.
| | | | - Lorella Minotti
- Department of Neurology, Grenoble University Hospital, Grenoble, France.
| | - Philippe Kahane
- Department of Neurology, Grenoble University Hospital, Grenoble, France.
| | - Andreas K Engel
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Jean-Philippe Lachaux
- INSERM U1028, Brain Dynamics and Cognition Team, Lyon Neuroscience Research Center, Lyon, France; University Claude Bernard, Lyon, France.
| | - Till R Schneider
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Güntekin B, Başar E. A review of brain oscillations in perception of faces and emotional pictures. Neuropsychologia 2014; 58:33-51. [PMID: 24709570 DOI: 10.1016/j.neuropsychologia.2014.03.014] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 03/07/2014] [Accepted: 03/26/2014] [Indexed: 02/07/2023]
Affiliation(s)
- Bahar Güntekin
- Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul Kültür University, Istanbul 34156, Turkey.
| | - Erol Başar
- Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul Kültür University, Istanbul 34156, Turkey
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Cho-Hisamoto Y, Kojima K, Brown EC, Matsuzaki N, Asano E. Gamma activity modulated by naming of ambiguous and unambiguous images: intracranial recording. Clin Neurophysiol 2014; 126:17-26. [PMID: 24815577 DOI: 10.1016/j.clinph.2014.03.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 03/17/2014] [Accepted: 03/25/2014] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Humans sometimes need to recognize objects based on vague and ambiguous silhouettes. Recognition of such images may require an intuitive guess. We determined the spatial-temporal characteristics of intracranially-recorded gamma activity (at 50-120Hz) augmented differentially by naming of ambiguous and unambiguous images. METHODS We studied 10 patients who underwent epilepsy surgery. Ambiguous and unambiguous images were presented during extraoperative electrocorticography recording, and patients were instructed to overtly name the object as it is first perceived. RESULTS Both naming tasks were commonly associated with gamma-augmentation sequentially involving the occipital and occipital-temporal regions, bilaterally, within 200ms after the onset of image presentation. Naming of ambiguous images elicited gamma-augmentation specifically involving portions of the inferior-frontal, orbitofrontal, and inferior-parietal regions at 400ms and after. Unambiguous images were associated with more intense gamma-augmentation in portions of the occipital and occipital-temporal regions. CONCLUSIONS Frontal-parietal gamma-augmentation specific to ambiguous images may reflect the additional cortical processing involved in exerting intuitive guess. Occipital gamma-augmentation enhanced during naming of unambiguous images can be explained by visual processing of stimuli with richer detail. SIGNIFICANCE Our results support the theoretical model that guessing processes in visual domain occur following the accumulation of sensory evidence resulting from the bottom-up processing in the occipital-temporal visual pathways.
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Affiliation(s)
- Yoshimi Cho-Hisamoto
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit, MI 48201, USA; Department of Neurology, Children's Hospital of Michigan, Wayne State University, Detroit, MI 48201, USA
| | - Katsuaki Kojima
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit, MI 48201, USA
| | - Erik C Brown
- MD-PhD Program, Wayne State University, School of Medicine, Detroit, MI 48201, USA
| | - Naoyuki Matsuzaki
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit, MI 48201, USA
| | - Eishi Asano
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit, MI 48201, USA; Department of Neurology, Children's Hospital of Michigan, Wayne State University, Detroit, MI 48201, USA.
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Sato W, Kochiyama T, Uono S, Matsuda K, Usui K, Inoue Y, Toichi M. Rapid, high-frequency, and theta-coupled gamma oscillations in the inferior occipital gyrus during face processing. Cortex 2014; 60:52-68. [PMID: 24745564 DOI: 10.1016/j.cortex.2014.02.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 01/15/2014] [Accepted: 02/26/2014] [Indexed: 01/21/2023]
Abstract
Neuroimaging studies have found greater activation in the inferior occipital gyrus (IOG), or occipital face area, in response to faces relative to non-facial stimuli. However, the temporal, frequency, and functional profiles of IOG activity during face processing remain unclear. Here, this issue was investigated by recording intracranial field potentials in the IOG during the presentation of faces, mosaics, and houses in upright and inverted orientations. Time-frequency statistical parametric mapping analyses revealed greater gamma-band activation in the IOG beginning at 110 msec and covering 40-300 Hz in response to upright faces relative to upright houses and mosaics. Phase-amplitude cross-frequency coupling analyses revealed more evident theta-gamma couplings at 115-256 msec during the processing of upright faces as compared with that of upright houses and mosaics. Comparable gamma-band activity was observed during the processing of inverted and upright faces at about 100-200 msec, but weaker activity and different coupling with theta-band activity after 200 msec. These patterns of activity were more evident in the right than in the left IOG. These results, together with other evidence on neural communication, suggest that broadband gamma oscillations in the right IOG conduct rapid and multistage (i.e., both featural and configural) face processing in collaboration with theta oscillations transmitted from other brain regions.
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Affiliation(s)
- Wataru Sato
- The Hakubi Project, Primate Research Institute, Kyoto University, Japan; The Organization for Promoting Research in Developmental Disorders, Japan.
| | | | - Shota Uono
- Faculty of Human Health Science, Kyoto University, Japan
| | - Kazumi Matsuda
- National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Japan
| | - Keiko Usui
- National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Japan
| | - Yushi Inoue
- National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Japan
| | - Motomi Toichi
- The Organization for Promoting Research in Developmental Disorders, Japan; Faculty of Human Health Science, Kyoto University, Japan
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Shultz S, van den Honert RN, Engell AD, McCarthy G. Stimulus-induced reversal of information flow through a cortical network for animacy perception. Soc Cogn Affect Neurosci 2014; 10:129-35. [PMID: 24625785 DOI: 10.1093/scan/nsu028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Decades of research have demonstrated that a region of the right fusiform gyrus (FG) and right posterior superior temporal sulcus (pSTS) responds preferentially to static faces and biological motion, respectively. Despite this view, both regions activate in response to both stimulus categories and to a range of other stimuli, such as goal-directed actions, suggesting that these regions respond to characteristics of animate agents more generally. Here we propose a neural model for animacy detection composed of processing streams that are initially differentially sensitive to cues signaling animacy, but that ultimately act in concert to support reasoning about animate agents. We use dynamic causal modeling, a measure of effective connectivity, to demonstrate that the directional flow of information between the FG and pSTS is initially dependent on the characteristics of the animate agent presented, a key prediction of our proposed network for animacy detection.
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Affiliation(s)
- Sarah Shultz
- Department of Psychology, Yale University, New Haven, CT 06520-8205, USA
| | | | - Andrew D Engell
- Department of Psychology, Yale University, New Haven, CT 06520-8205, USA
| | - Gregory McCarthy
- Department of Psychology, Yale University, New Haven, CT 06520-8205, USA
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Perry G, Singh KD. Localizing evoked and induced responses to faces using magnetoencephalography. Eur J Neurosci 2014; 39:1517-27. [PMID: 24617643 PMCID: PMC4232859 DOI: 10.1111/ejn.12520] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 01/16/2014] [Accepted: 01/21/2014] [Indexed: 11/28/2022]
Abstract
A rich pattern of responses in frequency, time and space are known to be generated in the visual cortex in response to faces. Recently, a number of studies have used magnetoencephalography (MEG) to try to record these responses non-invasively – in many cases using source analysis techniques based on the beamforming method. Here we sought both to characterize best practice for measuring face-specific responses using MEG beamforming, and to determine whether the results produced by the beamformer match evidence from other modalities. We measured activity to visual presentation of face stimuli and phase-scrambled control stimuli, and performed source analyses of both induced and evoked responses using Synthetic Aperture Magnetometry. We localized the gamma-band response to bilateral lateral occipital cortex, and both the gamma-band response and the M170-evoked response to the right fusiform gyrus. Differences in the gamma-band response between faces and scrambled stimuli were confined to the frequency range 50–90 Hz; gamma-band activity at higher frequencies did not differ between the two stimulus categories. We additionally identified a component of the M220-evoked response – localized to the parieto-occipital sulcus – which was enhanced for scrambled vs. unscrambled faces. These findings help to establish that MEG beamforming can localize face-specific responses in time, frequency and space with good accuracy (when validated against established findings from functional magnetic resonance imaging and intracranial recordings), as well as contributing to the establishment of best methodological practice for the use of the beamformer method to measure face-specific responses.
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Affiliation(s)
- Gavin Perry
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology, Cardiff University, 70 Park Place, Cardiff, CF10 3AT, Wales, UK
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41
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Huebl J, Spitzer B, Brücke C, Schönecker T, Kupsch A, Alesch F, Schneider GH, Kühn AA. Oscillatory subthalamic nucleus activity is modulated by dopamine during emotional processing in Parkinson's disease. Cortex 2014; 60:69-81. [PMID: 24713195 DOI: 10.1016/j.cortex.2014.02.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 01/09/2014] [Accepted: 02/12/2014] [Indexed: 11/19/2022]
Abstract
Dopaminergic denervation in Parkinson's disease (PD) leads to motor deficits but also depression, lack of motivation and apathy. These symptoms can be reversed by dopaminergic treatment, which may even lead to an increased hedonic tone in some patients with PD. Here, we tested the effects of dopamine on emotional processing as indexed by changes in local field potential (LFP) activity of the subthalamic nucleus (STN) in 28 PD patients undergoing deep brain stimulation. LFP activity from the STN was recorded after the administration of levodopa (ON group) or after overnight withdrawal of medication (OFF group) during presentation of an emotional picture-viewing task. Neutral and emotionally arousing pleasant and unpleasant stimuli were chosen from the International Affective Picture System. We found a double dissociation of the alpha band response depending on dopamine state and stimulus valence: dopamine enhanced the processing of pleasant stimuli, while activation during unpleasant stimuli was reduced, as indexed by the degree of desynchronization in the alpha frequency band. This pattern was reversed in the OFF state and more pronounced in the subgroup of non-depressed PD patients. Further, we found an early gamma band increase with unpleasant stimuli that occurred when ON but not OFF medication and was correlated with stimulus arousal. The late STN alpha band decrease is thought to represent active processing of sensory information. Our findings support the idea that dopamine enhances approach-related processes during late stimulus evaluation in PD. The early gamma band response may represent local encoding of increased attention, which varies as a function of stimulus arousal.
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Affiliation(s)
- Julius Huebl
- Department of Neurology, Charité - University Medicine Berlin, Berlin, Germany
| | - Bernhard Spitzer
- Dahlem Institute for Neuroimaging of Emotion, Free University Berlin, Berlin, Germany
| | - Christof Brücke
- Department of Neurology, Charité - University Medicine Berlin, Berlin, Germany
| | - Thomas Schönecker
- Department of Neurology, Charité - University Medicine Berlin, Berlin, Germany
| | - Andreas Kupsch
- Department of Neurology, Charité - University Medicine Berlin, Berlin, Germany
| | - François Alesch
- Neurosurgical Department of the Vienna General Hospital, Vienna, Austria
| | - Gerd-Helge Schneider
- Department of Neurosurgery, Charité - University Medicine Berlin, Berlin, Germany
| | - Andrea A Kühn
- Department of Neurology, Charité - University Medicine Berlin, Berlin, Germany; Berlin School of Mind and Brain, Charité - University Medicine Berlin, Berlin, Germany; NeuroCure, Charité - University Medicine Berlin, Berlin, Germany.
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42
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Engell AD, McCarthy G. Repetition suppression of face-selective evoked and induced EEG recorded from human cortex. Hum Brain Mapp 2014; 35:4155-62. [PMID: 24677530 DOI: 10.1002/hbm.22467] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 12/17/2013] [Accepted: 01/07/2014] [Indexed: 01/02/2023] Open
Abstract
In functional MRI studies, repetition suppression refers to the reduction of hemodynamic activation to repeated stimulus presentation. For example, the repeated presentation of a face reduces the hemodynamic response evoked by faces in the fusiform gyrus. The neural events that underlie repetition suppression are not well understood. Indeed, in contrast to the hemodynamic response, the face-specific N200 recorded from subdural electrodes on the ventral occipitotemporal cortex, primarily along the fusiform gyrus, has been reported to be insensitive to face-identity repetition. We have previously described a face-specific broadband gamma (30-100 Hz) response at ventral face-specific N200 sites that is functionally dissociable from the N200. In this study, we investigate whether gamma and other components of the electroencephalogram spectrum are affected by face-identity repetition independently of the N200. Participants viewed sequentially presented identical faces. At sites on and around the fusiform gyrus, we found that face repetition modulated alpha (8-12 Hz), low-gamma (30-60 Hz), and high-gamma (60-100 Hz) synchrony, but not the N200. These findings provide evidence of a spatially co-localized progression of face processing. Whereas the N200 reflects an initial obligatory response that is less sensitive to face-identity repetition, the subsequent spectral fluctuations reflect more elaborative face processing and are thus sensitive to face novelty. It is notable that the observed modulations were different for different frequency bands. We observed repetition suppression of broadband gamma, but repetition enhancement of alpha synchrony. This difference is discussed with regard to an existing model of repetition suppression and behavioral repetition priming.
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Affiliation(s)
- Andrew D Engell
- Human Neuroscience Laboratory, Department of Psychology, Yale University, New Haven, Connecticut
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43
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Ribeiro MJ, d'Almeida OC, Ramos F, Saraiva J, Silva ED, Castelo-Branco M. Abnormal late visual responses and alpha oscillations in neurofibromatosis type 1: a link to visual and attention deficits. J Neurodev Disord 2014; 6:4. [PMID: 24559228 PMCID: PMC3944002 DOI: 10.1186/1866-1955-6-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 01/24/2014] [Indexed: 11/29/2022] Open
Abstract
Background Neurofibromatosis type 1 (NF1) affects several areas of cognitive function including visual processing and attention. We investigated the neural mechanisms underlying the visual deficits of children and adolescents with NF1 by studying visual evoked potentials (VEPs) and brain oscillations during visual stimulation and rest periods. Methods Electroencephalogram/event-related potential (EEG/ERP) responses were measured during visual processing (NF1 n = 17; controls n = 19) and idle periods with eyes closed and eyes open (NF1 n = 12; controls n = 14). Visual stimulation was chosen to bias activation of the three detection mechanisms: achromatic, red-green and blue-yellow. Results We found significant differences between the groups for late chromatic VEPs and a specific enhancement in the amplitude of the parieto-occipital alpha amplitude both during visual stimulation and idle periods. Alpha modulation and the negative influence of alpha oscillations in visual performance were found in both groups. Conclusions Our findings suggest abnormal later stages of visual processing and enhanced amplitude of alpha oscillations supporting the existence of deficits in basic sensory processing in NF1. Given the link between alpha oscillations, visual perception and attention, these results indicate a neural mechanism that might underlie the visual sensitivity deficits and increased lapses of attention observed in individuals with NF1.
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Affiliation(s)
- Maria J Ribeiro
- Visual Neuroscience Laboratory, Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Azinhaga de Santa Comba, Coimbra 3000-548, Portugal.
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Ferrarelli F, Smith R, Dentico D, Riedner BA, Zennig C, Benca RM, Lutz A, Davidson RJ, Tononi G. Experienced mindfulness meditators exhibit higher parietal-occipital EEG gamma activity during NREM sleep. PLoS One 2013; 8:e73417. [PMID: 24015304 PMCID: PMC3756031 DOI: 10.1371/journal.pone.0073417] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 07/22/2013] [Indexed: 11/18/2022] Open
Abstract
Over the past several years meditation practice has gained increasing attention as a non-pharmacological intervention to provide health related benefits, from promoting general wellness to alleviating the symptoms of a variety of medical conditions. However, the effects of meditation training on brain activity still need to be fully characterized. Sleep provides a unique approach to explore the meditation-related plastic changes in brain function. In this study we performed sleep high-density electroencephalographic (hdEEG) recordings in long-term meditators (LTM) of Buddhist meditation practices (approximately 8700 mean hours of life practice) and meditation naive individuals. We found that LTM had increased parietal-occipital EEG gamma power during NREM sleep. This increase was specific for the gamma range (25–40 Hz), was not related to the level of spontaneous arousal during NREM and was positively correlated with the length of lifetime daily meditation practice. Altogether, these findings indicate that meditation practice produces measurable changes in spontaneous brain activity, and suggest that EEG gamma activity during sleep represents a sensitive measure of the long-lasting, plastic effects of meditative training on brain function.
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Affiliation(s)
- Fabio Ferrarelli
- Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Richard Smith
- Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Daniela Dentico
- Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Brady A. Riedner
- Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Corinna Zennig
- Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Ruth M. Benca
- Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Antoine Lutz
- Waisman Center for Brain Imaging and Behavior, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Lyon Neuroscience Research Center, Lyon 1 University, Lyon, France
| | - Richard J. Davidson
- Waisman Center for Brain Imaging and Behavior, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Psychology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Giulio Tononi
- Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- * E-mail:
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45
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Chong SC, Jo S, Park KM, Joo EY, Lee MJ, Hong SC, Hong SB. Interaction between the electrical stimulation of a face-selective area and the perception of face stimuli. Neuroimage 2013; 77:70-6. [DOI: 10.1016/j.neuroimage.2013.01.074] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 12/18/2012] [Accepted: 01/26/2013] [Indexed: 11/26/2022] Open
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A review of gamma oscillations in healthy subjects and in cognitive impairment. Int J Psychophysiol 2013; 90:99-117. [PMID: 23892065 DOI: 10.1016/j.ijpsycho.2013.07.005] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 07/02/2013] [Accepted: 07/17/2013] [Indexed: 11/22/2022]
Abstract
This review describes a wide range of functional correlates of gamma oscillations in whole-brain work, in neuroethology, sensory-cognitive dynamics, emotion, and cognitive impairment. This survey opens a new window towards understanding the brain's gamma activity. Gamma responses are selectively distributed in the whole brain, and do not reflect only a unique, specific function of the nervous system. Sensory responses from cortex, thalamus, hippocampus, and reticular formations in animal and human brains, and also cognitive responses, were described by several authors. According to reviewed results, it becomes obvious that cognitive disorders, and medication-which influence the transmitter release-change entirely the understanding of the big picture in cognitive processes. Gamma activity is evoked or induced by different sensory stimuli or cognitive tasks. Thus, it is argued that gamma-band synchronization is an elementary and fundamental process in whole-brain operation. In conclusion, reasoning and suggestions for understanding gamma activity are highlighted.
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Engell AD, McCarthy G. Probabilistic atlases for face and biological motion perception: an analysis of their reliability and overlap. Neuroimage 2013; 74:140-51. [PMID: 23435213 PMCID: PMC3690657 DOI: 10.1016/j.neuroimage.2013.02.025] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 01/07/2013] [Accepted: 02/02/2013] [Indexed: 11/24/2022] Open
Abstract
Neuroimaging research has identified several category-selective regions in visual cortex that respond most strongly when viewing an exemplar image from a preferred category, such as faces. Recent studies, however, have suggested a more complex pattern of activation that has been heretofore unrecognized, e.g., the presence of additional patches of activation to faces beyond the well-studied fusiform face area, and the activation of ostensible face selective regions by animate motion of non-biological forms. Here, we characterize the spatial pattern of brain activity evoked by viewing faces or biological motion in large fMRI samples (N>120). We create probabilistic atlases for both face and biological motion activation, and directly compare their spatial patterns of activation. Our findings support the suggestion that the fusiform face area is composed of at least two separable foci of activation. The face-evoked response in the fusiform and nearby ventral temporal cortex has good reliability across runs; however, we found surprisingly high variability in lateral brain regions by faces, and for all brain regions by biological motion, which had an overall much lower effect size. We found that faces and biological motion evoke substantially overlapping activation distributions in both ventral and lateral occipitotemporal cortices. The peaks of activation for these different categories within these overlapping regions were close but distinct.
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Affiliation(s)
- Andrew D. Engell
- Human Neuroscience Laboratory, Department of Psychology, Yale University, New Haven, CT, USA
| | - Gregory McCarthy
- Human Neuroscience Laboratory, Department of Psychology, Yale University, New Haven, CT, USA
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Sandberg K, Bahrami B, Kanai R, Barnes GR, Overgaard M, Rees G. Early visual responses predict conscious face perception within and between subjects during binocular rivalry. J Cogn Neurosci 2013; 25:969-85. [PMID: 23281780 PMCID: PMC4060063 DOI: 10.1162/jocn_a_00353] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Previous studies indicate that conscious face perception may be related to neural activity in a large time window around 170-800 msec after stimulus presentation, yet in the majority of these studies changes in conscious experience are confounded with changes in physical stimulation. Using multivariate classification on MEG data recorded when participants reported changes in conscious perception evoked by binocular rivalry between a face and a grating, we showed that only MEG signals in the 120-320 msec time range, peaking at the M170 around 180 msec and the P2m at around 260 msec, reliably predicted conscious experience. Conscious perception could not only be decoded significantly better than chance from the sensors that showed the largest average difference, as previous studies suggest, but also from patterns of activity across groups of occipital sensors that individually were unable to predict perception better than chance. In addition, source space analyses showed that sources in the early and late visual system predicted conscious perception more accurately than frontal and parietal sites, although conscious perception could also be decoded there. Finally, the patterns of neural activity associated with conscious face perception generalized from one participant to another around the times of maximum prediction accuracy. Our work thus demonstrates that the neural correlates of particular conscious contents (here, faces) are highly consistent in time and space within individuals and that these correlates are shared to some extent between individuals.
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Caruana F, Cantalupo G, Lo Russo G, Mai R, Sartori I, Avanzini P. Human cortical activity evoked by gaze shift observation: an intracranial EEG study. Hum Brain Mapp 2013; 35:1515-28. [PMID: 23568412 DOI: 10.1002/hbm.22270] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 01/10/2013] [Accepted: 01/17/2013] [Indexed: 11/08/2022] Open
Abstract
While is widely accepted that the posterior temporal region is activated during the observation of faces showing gaze shifts, it is still unclear whether its activity is stronger while observing direct or averted gaze. Furthermore, despite its assessed role in social cognition, studies describing an enhanced activity of the posterior temporal region during the observation of gaze aversion interpreted this activity in terms of spatial attention toward the target direction. This spatial attention interpretation is not easily reconcilable with the role of the posterior temporal region in social cognition, and an overarching view of its global cognitive function would be much more preferable. Here we used intracranial EEG to assess the precise spatial localization of the gaze shifts coding in the posterior temporal region, to assess its selectivity for direct versus averted gaze and to distinguish between a spatial-attentional and a social interpretations of gaze aversion. We found stronger activation during gaze aversion than direct gaze and lateral side switch observation, the latter indicating that the crucial aspect of gaze aversion is the prior presence of the eye contact and its interruption, and not the gaze direction. These results suggest a more social-oriented interpretation based on the view that among humans, gaze aversion signals a negative relational evaluation in social interaction.
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Affiliation(s)
- Fausto Caruana
- Brain Center for Social and Motor Cognition, Italian Institute of Technology, Parma, Italy
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Spatial and object-based attention modulates broadband high-frequency responses across the human visual cortical hierarchy. J Neurosci 2013; 33:1228-40. [PMID: 23325259 DOI: 10.1523/jneurosci.3181-12.2013] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One of the puzzling aspects in the visual attention literature is the discrepancy between electrophysiological and fMRI findings: whereas fMRI studies reveal strong attentional modulation in the earliest visual areas, single-unit and local field potential studies yielded mixed results. In addition, it is not clear to what extent spatial attention effects extend from early to high-order visual areas. Here we addressed these issues using electrocorticography recordings in epileptic patients. The patients performed a task that allowed simultaneous manipulation of both spatial and object-based attention. They were presented with composite stimuli, consisting of a small object (face or house) superimposed on a large one, and in separate blocks, were instructed to attend one of the objects. We found a consistent increase in broadband high-frequency (30-90 Hz) power, but not in visual evoked potentials, associated with spatial attention starting with V1/V2 and continuing throughout the visual hierarchy. The magnitude of the attentional modulation was correlated with the spatial selectivity of each electrode and its distance from the occipital pole. Interestingly, the latency of the attentional modulation showed a significant decrease along the visual hierarchy. In addition, electrodes placed over high-order visual areas (e.g., fusiform gyrus) showed both effects of spatial and object-based attention. Overall, our results help to reconcile previous observations of discrepancy between fMRI and electrophysiology. They also imply that spatial attention effects can be found both in early and high-order visual cortical areas, in parallel with their stimulus tuning properties.
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