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Tansey R, Graff K, Rai S, Merrikh D, Godfrey KJ, Vanderwal T, Bray S. Development of human visual cortical function: A scoping review of task- and naturalistic-fMRI studies through the interactive specialization and maturational frameworks. Neurosci Biobehav Rev 2024; 162:105729. [PMID: 38763178 DOI: 10.1016/j.neubiorev.2024.105729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 05/12/2024] [Accepted: 05/14/2024] [Indexed: 05/21/2024]
Abstract
Overarching theories such as the interactive specialization and maturational frameworks have been proposed to describe human functional brain development. However, these frameworks have not yet been systematically examined across the fMRI literature. Visual processing is one of the most well-studied fields in neuroimaging, and research in this area has recently expanded to include naturalistic paradigms that facilitate study in younger age ranges, allowing for an in-depth critical appraisal of these frameworks across childhood. To this end, we conducted a scoping review of 94 developmental visual fMRI studies, including both traditional experimental task and naturalistic studies, across multiple sub-domains (early visual processing, category-specific higher order processing, naturalistic visual processing). We found that across domains, many studies reported progressive development, but few studies describe regressive or emergent changes necessary to fit the maturational or interactive specialization frameworks. Our findings suggest a need for the expansion of developmental frameworks and clearer reporting of both progressive and regressive changes, along with well-powered, longitudinal studies.
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Affiliation(s)
- Ryann Tansey
- Department of Psychiatry, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.
| | - Kirk Graff
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada; Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, USA
| | - Shefali Rai
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Daria Merrikh
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Kate J Godfrey
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Tamara Vanderwal
- Department of Psychiatry, University of British Columbia, Vancouver, BC, Canada; BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Signe Bray
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada; Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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2
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Ju U, Wallraven C. Decoding the dynamic perception of risk and speed using naturalistic stimuli: A multivariate, whole-brain analysis. Hum Brain Mapp 2024; 45:e26652. [PMID: 38488473 PMCID: PMC10941534 DOI: 10.1002/hbm.26652] [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: 08/13/2023] [Revised: 02/20/2024] [Accepted: 02/25/2024] [Indexed: 03/18/2024] Open
Abstract
Time-resolved decoding of speed and risk perception in car driving is important for understanding the perceptual processes related to driving safety. In this study, we used an fMRI-compatible trackball with naturalistic stimuli to record dynamic ratings of perceived risk and speed and investigated the degree to which different brain regions were able to decode these. We presented participants with first-person perspective videos of cars racing on the same course. These videos varied in terms of subjectively perceived speed and risk profiles, as determined during a behavioral pilot. During the fMRI experiment, participants used the trackball to dynamically rate subjective risk in a first and speed in a second session and assessed overall risk and speed after watching each video. A standard multivariate correlation analysis based on these ratings revealed sparse decodability in visual areas only for the risk ratings. In contrast, the dynamic rating-based correlation analysis uncovered frontal, visual, and temporal region activation for subjective risk and dorsal visual stream and temporal region activation for subjectively perceived speed. Interestingly, further analyses showed that the brain regions for decoding risk changed over time, whereas those for decoding speed remained constant. Overall, our results demonstrate the advantages of time-resolved decoding to help our understanding of the dynamic networks associated with decoding risk and speed perception in realistic driving scenarios.
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Affiliation(s)
- Uijong Ju
- Department of Information DisplayKyung Hee UniversitySeoulSouth Korea
| | - Christian Wallraven
- Department of Brain and Cognitive EngineeringKorea UniversitySouth Korea
- Department of Artificial IntelligenceKorea UniversitySouth Korea
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3
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Breveglieri R, Borgomaneri S, Bosco A, Filippini M, De Vitis M, Tessari A, Avenanti A, Galletti C, Fattori P. rTMS over the human medial parietal cortex impairs online reaching corrections. Brain Struct Funct 2024; 229:297-310. [PMID: 38141108 PMCID: PMC10917872 DOI: 10.1007/s00429-023-02735-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 11/21/2023] [Indexed: 12/24/2023]
Abstract
Indirect correlational evidence suggests that the posteromedial sector of the human parietal cortex (area hV6A) is involved in reaching corrections. We interfered with hV6A functions using repetitive transcranial magnetic stimulation (rTMS) while healthy participants performed reaching movements and in-flight adjustments of the hand trajectory in presence of unexpected target shifts. rTMS over hV6A specifically altered action reprogramming, causing deviations of the shifted trajectories, particularly along the vertical dimension (i.e., distance). This study provides evidence of the functional relevance of hV6A in action reprogramming while a sudden event requires a change in performance and shows that hV6A also plays a role in state estimation during reaching. These findings are in line with neurological data showing impairments in actions performed along the distance dimension when lesions occur in the dorsal posterior parietal cortex.
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Affiliation(s)
- Rossella Breveglieri
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Piazza di Porta S. Donato 2, 40126, Bologna, Italy.
| | - Sara Borgomaneri
- Center for studies and research in Cognitive Neuroscience, Department of Psychology, University of Bologna, Cesena Campus, 47521, Cesena, Italy
| | - Annalisa Bosco
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Piazza di Porta S. Donato 2, 40126, Bologna, Italy
- Alma Mater Research Institute For Human-Centered Artificial Intelligence (Alma Human AI), University of Bologna, Bologna, Italy
| | - Matteo Filippini
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Piazza di Porta S. Donato 2, 40126, Bologna, Italy
- Alma Mater Research Institute For Human-Centered Artificial Intelligence (Alma Human AI), University of Bologna, Bologna, Italy
| | - Marina De Vitis
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Piazza di Porta S. Donato 2, 40126, Bologna, Italy
| | - Alessia Tessari
- Alma Mater Research Institute For Human-Centered Artificial Intelligence (Alma Human AI), University of Bologna, Bologna, Italy
- Department of Psychology, University of Bologna, 40127, Bologna, Italy
| | - Alessio Avenanti
- Center for studies and research in Cognitive Neuroscience, Department of Psychology, University of Bologna, Cesena Campus, 47521, Cesena, Italy
- Center for research in Neuropsychology and Cognitive Neurosciences, Catholic University of Maule, 3460000, Talca, Chile
| | - Claudio Galletti
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Piazza di Porta S. Donato 2, 40126, Bologna, Italy
| | - Patrizia Fattori
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Piazza di Porta S. Donato 2, 40126, Bologna, Italy
- Alma Mater Research Institute For Human-Centered Artificial Intelligence (Alma Human AI), University of Bologna, Bologna, Italy
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Xu M, Nikolin S, Samaratunga N, Chow EJH, Loo CK, Martin DM. Cognitive Effects Following Offline High-Frequency Repetitive Transcranial Magnetic Stimulation (HF-rTMS) in Healthy Populations: A Systematic Review and Meta-Analysis. Neuropsychol Rev 2024; 34:250-276. [PMID: 36857011 PMCID: PMC10920443 DOI: 10.1007/s11065-023-09580-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 01/10/2023] [Indexed: 03/02/2023]
Abstract
High-frequency repetitive transcranial magnetic stimulation (HF-rTMS) is a commonly used form of rTMS to treat neuropsychiatric disorders. Emerging evidence suggests that 'offline' HF-rTMS may have cognitive enhancing effects, although the magnitude and moderators of these effects remain unclear. We conducted a systematic review and meta-analysis to clarify the cognitive effects of offline HF-rTMS in healthy individuals. A literature search for randomised controlled trials with cognitive outcomes for pre and post offline HF-rTMS was performed across five databases up until March 2022. This study was registered on the PROSPERO international prospective protocol for systematic reviews (PROSPERO 2020 CRD 42,020,191,269). The Risk of Bias 2 tool was used to assess the risk of bias in randomised trials. Separate analyses examined the cognitive effects of excitatory and inhibitory forms of offline HF-rTMS on accuracy and reaction times across six cognitive domains. Fifty-three studies (N = 1507) met inclusion criteria. Excitatory offline HF-rTMS showed significant small sized effects for improving accuracy (k = 46, g = 0.12) and reaction time (k = 44, g = -0.13) across all cognitive domains collapsed. Excitatory offline HF-rTMS demonstrated a relatively greater effect for executive functioning in accuracy (k = 24, g = 0.14). Reaction times were also improved for the executive function (k = 21, g = -0.11) and motor (k = 3, g = -0.22) domains following excitatory offline HF-rTMS. The current review was restricted to healthy individuals and future research is required to examine cognitive enhancement from offline HF-rTMS in clinical cohorts.
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Affiliation(s)
- Mei Xu
- Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Stevan Nikolin
- Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine, University of New South Wales, Sydney, Australia
- Black Dog Institute, Sydney, Australia
| | - Nisal Samaratunga
- Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Esther Jia Hui Chow
- Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Colleen K Loo
- Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine, University of New South Wales, Sydney, Australia
- Black Dog Institute, Sydney, Australia
- The George Institute for Global Health, Sydney, Australia
| | - Donel M Martin
- Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine, University of New South Wales, Sydney, Australia.
- Black Dog Institute, Sydney, Australia.
- UNSW Sydney, High St, Kensington, NSW, 2052, Australia.
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Wang B, Sun H, Pan X, Ma W, Dong L, Wang Q, Meng P. The effects of intermittent theta burst stimulation of the unilateral cerebellar hemisphere on swallowing-related brain regions in healthy subjects. Front Hum Neurosci 2023; 17:1100320. [PMID: 37063103 PMCID: PMC10097892 DOI: 10.3389/fnhum.2023.1100320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 03/13/2023] [Indexed: 03/31/2023] Open
Abstract
ObjectiveWe aimed to investigate the effects and mechanisms of swallowing-related brain regions using resting-state functional magnetic resonance imaging (rs-fMRI) in healthy subjects who underwent intermittent theta burst stimulation (iTBS) on dominant or non-dominant cerebellar hemispheres.MethodsThirty-nine healthy subjects were randomized into three groups that completed different iTBS protocols (dominant cerebellum group, non-dominant cerebellum group and sham group). Before iTBS, the resting motor threshold (rMT) was measured by single-pulse transcranial magnetic stimulation (sTMS) on the cerebellar representation of the suprahyoid muscles, and the dominant cerebellar hemisphere for swallowing was determined. Forty-eight hours after elution, iTBS protocols were completed: in the dominant cerebellum group, iTBS was administered to the dominant cerebellar hemisphere, and the non-dominant cerebellar hemisphere was given sham stimulation; in the non-dominant cerebellum group, iTBS was administered to the non-dominant cerebellar hemisphere, and sham stimulation was delivered to the dominant cerebellar hemisphere; in the sham group, sham stimulation was applied to the cerebellum bilaterally. Rs-fMRI was performed before and after iTBS stimulation to observe changes in the fractional amplitude of low-frequency fluctuation (fALFF) in the whole brain.ResultsCompared with baseline, the dominant cerebellum group showed increased fALFF in the ipsilateral cerebellum, and decreased fALFF in the ipsilateral middle temporal gyrus and contralateral precuneus after iTBS; the iTBS of the non-dominant cerebellum group induced increased fALFF in the ipsilateral superior frontal gyrus, the calcarine fissure and the surrounding cortex, and the contralateral inferior parietal lobule; and in the sham group, there was no significant difference in fALFF. Exploring the effects induced by iTBS among groups, the dominant cerebellum group showed decreased fALFF in the contralateral calcarine fissure, and surrounding cortex compared with the sham group.ConclusionIntermittent theta burst stimulation of the dominant cerebellar hemisphere for swallowing excited the ipsilateral cerebellum, and stimulation of the non-dominant cerebellar hemisphere increased the spontaneous neural activity of multiple cerebrocortical areas related to swallowing. In conclusion, regardless of which side of the cerebellum is stimulated, iTBS can facilitate part of the brain neural network related to swallowing. Our findings provide supporting evidence that cerebellar iTBS can be used as a potential method to modulate human swallowing movement.
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Affiliation(s)
- Bingyan Wang
- Department of Rehabilitation Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Hui Sun
- Department of Rehabilitation Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiaona Pan
- Department of Rehabilitation Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Wenshuai Ma
- Department of Radiology, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Linghui Dong
- Department of Rehabilitation Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qiang Wang
- Department of Rehabilitation Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
- *Correspondence: Qiang Wang,
| | - Pingping Meng
- Department of Rehabilitation Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
- Pingping Meng,
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Chiappini E, Sel A, Hibbard PB, Avenanti A, Romei V. Increasing interhemispheric connectivity between human visual motion areas uncovers asymmetric sensitivity to horizontal motion. Curr Biol 2022; 32:4064-4070.e3. [PMID: 35987211 DOI: 10.1016/j.cub.2022.07.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/05/2022] [Accepted: 07/20/2022] [Indexed: 11/25/2022]
Abstract
Our conscious perceptual experience relies on a hierarchical process involving integration of low-level sensory encoding and higher-order sensory selection.1 This hierarchical process may scale at different levels of brain functioning, including integration of information between the hemispheres.2-5 Here, we test this hypothesis for the perception of visual motion stimuli. Across 3 experiments, we manipulated the connectivity between the left and right visual motion complexes (V5/MT+) responsible for horizontal motion perception2,3 by means of transcranial magnetic stimulation (TMS).4,5 We found that enhancing the strength of connections from the left to the right V5/MT+, by inducing spike-timing-dependent plasticity6 in this pathway, increased sensitivity to horizontal motion. These changes were present immediately and lasted at least 90 min after intervention. Notably, little perceptual changes were observed when strengthening connections from the right to the left V5/MT+. Furthermore, we found that this asymmetric modulation was mirrored by an asymmetric perceptual bias in the direction of the horizontal motion. Overall, observers were biased toward leftward relative to rightward motion direction. Crucially, following the strengthening of the connections from right to left V5/MT+, this bias could be momentarily reversed. These results suggest that the projections connecting left and right V5/MT+ in the human visual cortex are asymmetrical, subtending a hierarchical role of hemispheric specialization7-10 favoring left-to-right hemisphere processing for integrating local sensory input into coherent global motion perception.
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Affiliation(s)
- Emilio Chiappini
- Centre for Brain Science, Department of Psychology, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK; Centro studi e ricerche in Neuroscienze Cognitive, Dipartimento di Psicologia, Alma Mater Studiorum-Università di Bologna, Campus di Cesena, Via Rasi e Spinelli 176, 47521 Cesena, Italy; Institut für Klinische und Gesundheitspsychologie, Universität Wien, Liebiggasse 5, 1010 Vienna, Austria
| | - Alejandra Sel
- Centre for Brain Science, Department of Psychology, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
| | - Paul B Hibbard
- Centre for Brain Science, Department of Psychology, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
| | - Alessio Avenanti
- Centro studi e ricerche in Neuroscienze Cognitive, Dipartimento di Psicologia, Alma Mater Studiorum-Università di Bologna, Campus di Cesena, Via Rasi e Spinelli 176, 47521 Cesena, Italy; Centro de Investigación en Neuropsicología y Neurociencias Cognitivas, Universidad Católica del Maule, 3460000 Talca, Chile
| | - Vincenzo Romei
- Centre for Brain Science, Department of Psychology, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK; Centro studi e ricerche in Neuroscienze Cognitive, Dipartimento di Psicologia, Alma Mater Studiorum-Università di Bologna, Campus di Cesena, Via Rasi e Spinelli 176, 47521 Cesena, Italy.
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7
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Chakraborty A, Tran TT, Silva AE, Giaschi D, Thompson B. Continuous theta burst TMS of area MT+ impairs attentive motion tracking. Eur J Neurosci 2021; 54:7289-7300. [PMID: 34591329 DOI: 10.1111/ejn.15480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 09/16/2021] [Accepted: 09/20/2021] [Indexed: 11/28/2022]
Abstract
Attentive motion tracking deficits measured using multiple object tracking (MOT) tasks have been identified in a number of neurodevelopmental disorders such as amblyopia and autism. These deficits are often attributed to the abnormal development of high-level attentional networks. However, neuroimaging evidence from amblyopia suggests that reduced MOT performance can be explained by impaired function in motion-sensitive area MT+ alone. To test the hypothesis that a subtle disruption of MT+ function could cause MOT impairment, we assessed whether continuous theta burst stimulation (cTBS) of MT+ influenced MOT task accuracy in individuals with normal vision. The MOT stimulus consisted of four target and four distractor dots and was presented at ±10° eccentricity (right/left hemifield). fMRI-guided cTBS was applied to left MT+. Participants (n = 13, age: 27 ± 3) attended separate active and sham cTBS sessions where the MOT task was completed before, 5-min post- and 30-min post-cTBS. Active cTBS significantly impaired MOT task accuracy relative to baseline for the right (stimulated) hemifield 5-min (10 ± 2% reduction) and 30-min (14 ± 3% reduction) post-stimulation. No impairment occurred within the left (control) hemifield after active cTBS or for either hemifield after sham cTBS. These results highlight the importance of lower level motion processing for MOT, suggesting that a minor disruption of MT+ function alone is sufficient to cause a deficit in MOT performance.
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Affiliation(s)
- Arijit Chakraborty
- School of Optometry and Vision Science, Faculty of Science, University of Waterloo, Waterloo, Ontario, Canada.,Chicago College of Optometry, Midwestern University, Downers Grove, Illinois, USA
| | - Tiffany T Tran
- School of Optometry and Vision Science, Faculty of Science, University of Waterloo, Waterloo, Ontario, Canada
| | - Andrew E Silva
- School of Optometry and Vision Science, Faculty of Science, University of Waterloo, Waterloo, Ontario, Canada
| | - Deborah Giaschi
- Department of Ophthalmology and Visual Sciences, University of British Columbia/B.C. Children's Hospital, Vancouver, British Columbia, Canada
| | - Benjamin Thompson
- School of Optometry and Vision Science, Faculty of Science, University of Waterloo, Waterloo, Ontario, Canada.,Centre for Eye and Vision Research (CEVR), Hong Kong, China.,Liggins Institute, University of Auckland, Auckland, New Zealand
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8
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Lasagna CA, Taylor SF, Lee TG, Rutherford S, Greathouse T, Gu P, Tso IF. Continuous Theta Burst Stimulation to the Secondary Visual Cortex at 80% Active Motor Threshold Does Not Impair Central Vision in Humans During a Simple Detection Task. Front Hum Neurosci 2021; 15:709275. [PMID: 34512296 PMCID: PMC8429821 DOI: 10.3389/fnhum.2021.709275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 08/02/2021] [Indexed: 11/14/2022] Open
Abstract
Continuous theta burst stimulation (cTBS) is a powerful form of repetitive transcranial magnetic stimulation capable of suppressing cortical excitability for up to 50 min. A growing number of studies have applied cTBS to the visual cortex in human subjects to investigate the neural dynamics of visual processing, but few have specifically examined its effects on central vision, which has crucial implications for safety and inference on downstream cognitive effects. The present study assessed the safety of offline, neuronavigated cTBS to V2 by examining its effects on central vision performance. In this single-blind, randomized sham-controlled, crossover study, 17 healthy adults received cTBS (at 80% active motor threshold) and sham to V2 1–2 weeks apart. Their central vision (≤8°) was tested at 1-min (T1) and again at 50-min (T50) post-stimulation. Effects of condition (cTBS vs. sham) and time (T1 vs. T50) on accuracy and reaction time were examined using Bayes factor. Bayes factor results suggested that cTBS did not impair stimulus detection over the entire central visual field nor subfields at T1 or T50. Our results offer the first explicit evidence supporting that cTBS applied to V2 does not create blind spots in the central visual field in humans during a simple detection task. Any subtler changes to vision and downstream visual perception should be investigated in future studies.
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Affiliation(s)
- Carly A Lasagna
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, United States
| | - Stephan F Taylor
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, United States
| | - Taraz G Lee
- Department of Psychology, University of Michigan, Ann Arbor, MI, United States
| | - Saige Rutherford
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, United States.,Department of Cognitive Neuroscience, Radboud University Medical Center, Nijmegen, Netherlands
| | - Tristan Greathouse
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, United States
| | - Pan Gu
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, United States
| | - Ivy F Tso
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, United States.,Department of Psychology, University of Michigan, Ann Arbor, MI, United States
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Zheng Y, Zhao W, Ma X, Dong L, Tian L, Zhou M. Comparison of ELF-EMFs stimulation with current stimulation on the regulation of LTP of SC-CA1 synapses in young rat hippocampus. Int J Radiat Biol 2021; 97:1032-1041. [PMID: 33970763 DOI: 10.1080/09553002.2021.1928781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 04/22/2021] [Accepted: 05/04/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Long-term potentiation (LTP) is an important functional indicator for synaptic plasticity. Extremely low frequency electromagnetic fields (ELF-EMFs) are a physical means to regulate LTP, which induce induced currents. It is unknown whether induced current is the key factor when LTP is regulated by ELF-EMFs.New Method: A method is proposed for calculating the current value induced by ELF-EMFs. Then, a comparison of ELF-EMFs with current on the regulation of theta-burst or high-frequency stimulation (TBS/HFS)-LTP was performed. RESULTS The LTP after ELF-EMFs and μA current regulation was significantly reduced. The regulatory effect of 0.1 μA current on LTP was similar with 100 Hz/2 mT ELF-EMFs, while 0.2 μA had a stronger regulatory effect than 200 Hz/2 mT on HFS-LTP.Comparison with Existing Methods: Most of the existing methods were used to calculate the induced current in human models, while we present a more accurate model for calculating the induced current induced by ELF-EMFs in the rat brain slices. CONCLUSIONS This work indicated that μA current and ELF-EMFs stimulation reduced LTP. Also, we demonstrated that the regulatory effect of ELF-EMFs on LTP is not entirely deriving from the induced current, since its magnetic mechanism might have played a certain role.
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Affiliation(s)
- Yu Zheng
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Wenjun Zhao
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Xiaoxu Ma
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Lei Dong
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin, China
| | - Lei Tian
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Mei Zhou
- Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China
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10
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Cohen D, Goddard E, Mullen KT. Reevaluating hMT+ and hV4 functional specialization for motion and static contrast using fMRI-guided repetitive transcranial magnetic stimulation. J Vis 2019; 19:11. [PMID: 30916726 DOI: 10.1167/19.3.11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Although visual areas hMT+ and hV4 are considered to have segregated functions for the processing of motion and form within dorsal and ventral streams, respectively, more recent evidence favors some functional overlap. Here we use fMRI-guided online repetitive transcranial magnetic stimulation (rTMS) to test two associated hypotheses: that area hV4 is causally involved in the perception of motion and hMT+ in the perception of static form. We use variations of a common global stimulus to test two dynamic motion-based tasks and two static form-based tasks in ipsilateral and contralateral visual fields. We find that rTMS to both hMT+ and hV4 significantly impairs direction discrimination and causes a perceptual slowing of motion, implicating hV4 in motion perception. Stimulation of hMT+ impairs motion in both visual fields, implying that disruption to one hMT+ disrupts the other with both needed for optimal performance. For the second hypothesis, we find the novel result that hV4 stimulation markedly reduces perceived contrast of a static stimulus. hMT+ stimulation also produces an effect, implicating it in static contrast perception. Our findings are the first to show that rTMS of hV4 can produce a large perceptual effect and, taken together, suggest a less rigid functional segregation between hMT+ and hV4 than previously thought.
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Affiliation(s)
- Daniel Cohen
- McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Quebec, Canada
| | - Erin Goddard
- McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Quebec, Canada
| | - Kathy T Mullen
- McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Quebec, Canada
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11
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Chabanat E, Jacquin-Courtois S, Havé L, Kihoulou C, Tilikete C, Mauguière F, Rheims S, Rossetti Y. Can you guess the colour of this moving object? A dissociation between colour and motion in blindsight. Neuropsychologia 2018; 128:204-208. [PMID: 30102905 DOI: 10.1016/j.neuropsychologia.2018.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 06/01/2018] [Accepted: 08/08/2018] [Indexed: 10/28/2022]
Abstract
Blindsight has been primarily and extensively studied by Lawrence Weiskrantz. Residual visual abilities following a hemispheric lesion leading to homonymous hemianopia encompass a variety of visual-perceptual and visuo-motor functions. Attention blindsight produces the more salient subjective experiences, especially for motion (Riddoch phenomenon). Action blindsight illustrates visuo-motor abilities despite the patients' feeling that they produce random movements. Perception blindsight seems to be the weakest residual function observed in blindsight, e.g. for wavelength sensitivity. Discriminating motion produced by isoluminant colours does not give rise to blindsight for motion but the outcome of the reciprocal test is not known. Here we tested whether moving stimuli could give rise to colour discrimination in a patient with homonymous hemianopia. It was found that even though the patient exhibited nearly perfect performances for motion direction discrimination his colour discrimination for the same moving stimulus remained at chance level. It is concluded that easily discriminated moving stimuli do not give rise to colour discrimination and implications for the 3 levels of blindsight taxonomy are discussed.
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Affiliation(s)
- E Chabanat
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, France; Université de Lyon, Université Claude Bernard Lyon 1, France.
| | - S Jacquin-Courtois
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, France; Université de Lyon, Université Claude Bernard Lyon 1, France; Service de rééducation neurologique, Pavillon Bourret, Hôpital Henry-Gabrielle, Hospices Civils de Lyon, 20, route de Vourles, Saint-Genis-Laval, France; Plate-forme 'Mouvement et Handicap', Hôpital Henry-Gabrielle et Hôpital Neurologique Neurologique Pierre Wertheimer, Hospices Civils de Lyon, 20, route de Vourles, Saint-Genis-Laval, France.
| | - L Havé
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, France; Université de Lyon, Université Claude Bernard Lyon 1, France.
| | - C Kihoulou
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, France
| | - C Tilikete
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, France; Université de Lyon, Université Claude Bernard Lyon 1, France; Service de Neuro-Cognition et Neuro-Ophtalmologie, Hôpital Neurologique Pierre Wertheimer, Hospices Civils de Lyon, 59 boulevard Pinel, 69677 Bron Cedex, France.
| | - F Mauguière
- Université de Lyon, Université Claude Bernard Lyon 1, France; Département de Neurologie Fonctionnelle et Epileptologie, Hôpital Neurologique Pierre Wertheimer, Hospices Civils de Lyon, France; Inserm UMR-S 1028, CNRS UMR 5292, NeuroPain, Centre de Recherche en Neurosciences de Lyon, France.
| | - S Rheims
- Université de Lyon, Université Claude Bernard Lyon 1, France; Département de Neurologie Fonctionnelle et Epileptologie, Hôpital Neurologique Pierre Wertheimer, Hospices Civils de Lyon, France; Inserm UMR-S 1028, CNRS UMR 5292, TIGER, Centre de Recherche en Neurosciences de Lyon, France.
| | - Y Rossetti
- Inserm UMR-S 1028, CNRS UMR 5292, ImpAct, Centre de Recherche en Neurosciences de Lyon, France; Université de Lyon, Université Claude Bernard Lyon 1, France; Service de rééducation neurologique, Pavillon Bourret, Hôpital Henry-Gabrielle, Hospices Civils de Lyon, 20, route de Vourles, Saint-Genis-Laval, France; Plate-forme 'Mouvement et Handicap', Hôpital Henry-Gabrielle et Hôpital Neurologique Neurologique Pierre Wertheimer, Hospices Civils de Lyon, 20, route de Vourles, Saint-Genis-Laval, France.
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Alterations of the amplitude of low-frequency fluctuation in healthy subjects with theta-burst stimulation of the cortex of the suprahyoid muscles. Neuroscience 2017; 365:48-56. [PMID: 28947393 DOI: 10.1016/j.neuroscience.2017.09.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 09/13/2017] [Accepted: 09/14/2017] [Indexed: 12/15/2022]
Abstract
Theta burst stimulation (TBS) has emerged as a promising tool for the treatment of swallowing disorders; however, the short-term after-effects of brain activation induced by TBS remain unknown. Here, we measured the changes in spontaneous brain activation using the amplitude of low-frequency fluctuation (ALFF) approach in subjects who underwent different TBS protocols. Sixty right-handed healthy participants (male, n=30; female, n=30; mean age=23.5y) were recruited in this study and randomly assigned to three groups that underwent three different TBS protocols. In group 1, continuous TBS (cTBS) was positioned on the left hemisphere of the suprahyoid muscle cortex. For group 2, intermittent TBS (iTBS) was placed on the left hemisphere of the suprahyoid muscle cortex. Group 3 underwent combined cTBS/iTBS protocols in which iTBS on the right hemisphere was performed immediately after completing cTBS on the left suprahyoid muscle cortex. Compared to pre-TBS, post-cTBS showed decreased ALFF in the anterior cingulate gyrus (BA 32); post-iTBS induced an increase in ALFF in the bilateral precuneus (BA 7); and post-cTBS/iTBS induced a decrease in ALFF in the brainstem, and resulted in increased ALFF in the middle cingulate gyrus (BA 24) as well as the left precentral gyrus (BA 6). Compared the effect of post-TBS protocols, increased ALFF was found in left posterior cerebellum lobe and left inferior parietal lobule (BA 40) (post-cTBS vs post-iTBS), and decreased ALFF exhibited in paracentral lobule (BA 4) (post-iTBS vs post-cTBS/iTBS). These findings indicate that multiple brain areas involved in swallowing regulation after stimulation of TBS over the suprahyoid muscles. cTBS induces decreased after-effects while iTBS results in increased after-effects on spontaneous brain activation. Moreover, iTBS can eliminate the after-effects of cTBS applied on the contralateral swallowing cortex and alter the activity of contralateral motor cortex and brainstem. Our findings provide a novel evidence for the short-term effect of TBS on spontaneous brain activation.
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Chakraborty A, Anstice NS, Jacobs RJ, Paudel N, LaGasse LL, Lester BM, Wouldes TA, Harding JE, Thompson B. Global motion perception is independent from contrast sensitivity for coherent motion direction discrimination and visual acuity in 4.5-year-old children. Vision Res 2015; 115:83-91. [PMID: 26318529 PMCID: PMC4587337 DOI: 10.1016/j.visres.2015.08.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 07/28/2015] [Accepted: 08/22/2015] [Indexed: 01/25/2023]
Abstract
Global motion processing depends on a network of brain regions that includes extrastriate area V5 in the dorsal visual stream. For this reason, psychophysical measures of global motion perception have been used to provide a behavioral measure of dorsal stream function. This approach assumes that global motion is relatively independent of visual functions that arise earlier in the visual processing hierarchy such as contrast sensitivity and visual acuity. We tested this assumption by assessing the relationships between global motion perception, contrast sensitivity for coherent motion direction discrimination (henceforth referred to as contrast sensitivity) and habitual visual acuity in a large group of 4.5-year-old children (n=117). The children were born at risk of abnormal neurodevelopment because of prenatal drug exposure or risk factors for neonatal hypoglycemia. Motion coherence thresholds, a measure of global motion perception, were assessed using random dot kinematograms. The contrast of the stimuli was fixed at 100% and coherence was varied. Contrast sensitivity was measured using the same stimuli by fixing motion coherence at 100% and varying dot contrast. Stereoacuity was also measured. Motion coherence thresholds were not correlated with contrast sensitivity or visual acuity. However, lower (better) motion coherence thresholds were correlated with finer stereoacuity (ρ=0.38, p=0.004). Contrast sensitivity and visual acuity were also correlated (ρ=-0.26, p=0.004) with each other. These results indicate that global motion perception for high contrast stimuli is independent of contrast sensitivity and visual acuity and can be used to assess motion integration mechanisms in children.
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Affiliation(s)
- Arijit Chakraborty
- School of Optometry and Vision Science, University of Auckland, New Zealand
| | - Nicola S Anstice
- School of Optometry and Vision Science, University of Auckland, New Zealand
| | - Robert J Jacobs
- School of Optometry and Vision Science, University of Auckland, New Zealand
| | - Nabin Paudel
- School of Optometry and Vision Science, University of Auckland, New Zealand
| | - Linda L LaGasse
- Brown Center for the Study of Children at Risk, Warren Alpert Medical School at Brown University, USA
| | - Barry M Lester
- Brown Center for the Study of Children at Risk, Warren Alpert Medical School at Brown University, USA
| | - Trecia A Wouldes
- Department of Psychological Medicine, University of Auckland, New Zealand
| | | | - Benjamin Thompson
- School of Optometry and Vision Science, University of Auckland, New Zealand; School of Optometry and Vision Science, University of Waterloo, Canada.
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