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Cheng XP, Yu WH, Liu X, Lin W, Wang ZD, Wang XC, Ni J, Cai NQ, Chen XY. Transcranial Alternating Current Stimulation in a Patient with Ataxia-Ocular Apraxia 2: a Case Report. CEREBELLUM (LONDON, ENGLAND) 2024; 23:1713-1717. [PMID: 37993636 DOI: 10.1007/s12311-023-01637-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/13/2023] [Indexed: 11/24/2023]
Abstract
Ataxia-ocular apraxia 2 (AOA2) is a rare neurodegenerative autosomal recessive disorder with no effective treatment. In this study, we present the case of a patient diagnosed with AOA2, who experienced walking instability and uncoordinated movement. The patient underwent transcranial alternating current stimulation (tACS) treatment for 4 weeks with follow-up after 1 month. The effectiveness of the treatment was evaluated using the International Cooperative Ataxia Rating Scale (ICARS), the Scale for the Assessment and Rating of Ataxia (SARA), the 9-Hole Peg Test (9HPT), and functional near-infrared spectroscopy (fNIRS). Following treatment, the patient's ataxia symptoms showed significant improvement and continued to be alleviated during the follow-up period, suggesting a lasting effect of tACS treatment. Our findings from this case study provide compelling evidence for the potential of tACS as a treatment option for AOA2.
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Affiliation(s)
- Xiao-Ping Cheng
- Department of Rehabilitation Medicine of First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China
| | - Wen-Hui Yu
- The School of Health, Fujian Medical University, Fuzhou, 350122, China
| | - Xia Liu
- Department of Rehabilitation Medicine of First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China
| | - Wei Lin
- Department of Neurology and Institute of Neurology of First Affiliated Hospital, Institute of Neuroscience, and Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, 350005, China
| | - Zhao-Di Wang
- Department of Rehabilitation Medicine, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, 215008, China
| | - Xi-Chen Wang
- Department of Rehabilitation Medicine of First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China
| | - Jun Ni
- Department of Rehabilitation Medicine of First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China
| | - Nai-Qing Cai
- Department of Neurology and Institute of Neurology of First Affiliated Hospital, Institute of Neuroscience, and Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, 350005, China.
| | - Xin-Yuan Chen
- Department of Rehabilitation Medicine of First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China.
- Department of Rehabilitation Medicine, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China.
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2
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Libri I, Cantoni V, Benussi A, Rivolta J, Ferrari C, Fancellu R, Synofzik M, Alberici A, Padovani A, Borroni B. Comparing Cerebellar tDCS and Cerebellar tACS in Neurodegenerative Ataxias Using Wearable Sensors: A Randomized, Double-Blind, Sham-Controlled, Triple-Crossover Trial. CEREBELLUM (LONDON, ENGLAND) 2024; 23:570-578. [PMID: 37349632 PMCID: PMC10951038 DOI: 10.1007/s12311-023-01578-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/09/2023] [Indexed: 06/24/2023]
Abstract
Cerebellar transcranial direct current stimulation (tDCS) represents a promising therapeutic approach for both motor and cognitive symptoms in neurodegenerative ataxias. Recently, transcranial alternating current stimulation (tACS) was also demonstrated to modulate cerebellar excitability by neuronal entrainment. To compare the effectiveness of cerebellar tDCS vs. cerebellar tACS in patients with neurodegenerative ataxia, we performed a double-blind, randomized, sham controlled, triple cross-over trial with cerebellar tDCS, cerebellar tACS or sham stimulation in twenty-six participants with neurodegenerative ataxia. Before entering the study, each participant underwent motor assessment with wearable sensors considering gait cadence (steps/minute), turn velocity (degrees/second) and turn duration (seconds), and a clinical evaluation with the scale for the Assessment and Rating of Ataxia (SARA) and the International Cooperative Ataxia Rating Scale (ICARS). After each intervention, participants underwent the same clinical assessment along with cerebellar inhibition (CBI) measurement, a marker of cerebellar activity. The gait cadence, turn velocity, SARA, and ICARS significantly improved after both tDCS and tACS, compared to sham stimulation (all p<0.010). Comparable effects were observed for CBI (p<0.001). Overall, tDCS significantly outperformed tACS on clinical scales and CBI (p<0.01). A significant correlation between changes of wearable sensors parameters from baseline and changes of clinical scales and CBI scores was detected. Cerebellar tDCS and cerebellar tACS are effective in ameliorating symptoms of neurodegenerative ataxias, with the former being more beneficial than the latter. Wearable sensors may serve as rater-unbiased outcome measures in future clinical trials. ClinicalTrial.gov Identifier: NCT05621200.
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Affiliation(s)
- Ilenia Libri
- Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
| | - Valentina Cantoni
- Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
| | - Alberto Benussi
- Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
- Neurology Unit, Department of Neurological and Vision Sciences, ASST Spedali Civili, Brescia, Italy
| | - Jasmine Rivolta
- Neurology Unit, Department of Neurological and Vision Sciences, ASST Spedali Civili, Brescia, Italy
| | - Camilla Ferrari
- Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), University of Florence, Florence, Italy
| | - Roberto Fancellu
- UO Neurologia, IRCCS Ospedale Policlinico San Martino, 16132, Genoa, Italy
| | - Matthis Synofzik
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research and Centre of Neurology, Tübingen, Germany
- German Research Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Antonella Alberici
- Neurology Unit, Department of Neurological and Vision Sciences, ASST Spedali Civili, Brescia, Italy
| | - Alessandro Padovani
- Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
- Neurology Unit, Department of Neurological and Vision Sciences, ASST Spedali Civili, Brescia, Italy
| | - Barbara Borroni
- Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy.
- Neurology Unit, Department of Neurological and Vision Sciences, ASST Spedali Civili, Brescia, Italy.
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3
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Ulloa JL. The Control of Movements via Motor Gamma Oscillations. Front Hum Neurosci 2022; 15:787157. [PMID: 35111006 PMCID: PMC8802912 DOI: 10.3389/fnhum.2021.787157] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/22/2021] [Indexed: 01/07/2023] Open
Abstract
The ability to perform movements is vital for our daily life. Our actions are embedded in a complex environment where we need to deal efficiently in the face of unforeseen events. Neural oscillations play an important role in basic sensorimotor processes related to the execution and preparation of movements. In this review, I will describe the state of the art regarding the role of motor gamma oscillations in the control of movements. Experimental evidence from electrophysiological studies has shown that motor gamma oscillations accomplish a range of functions in motor control beyond merely signaling the execution of movements. However, these additional aspects associated with motor gamma oscillation remain to be fully clarified. Future work on different spatial, temporal and spectral scales is required to further understand the implications of gamma oscillations in motor control.
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Affiliation(s)
- José Luis Ulloa
- Programa de Investigación Asociativa (PIA) en Ciencias Cognitivas, Centro de Investigación en Ciencias Cognitivas (CICC), Facultad de Psicología, Universidad de Talca, Talca, Chile
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4
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Anderson DN, Charlebois CM, Smith EH, Arain AM, Davis TS, Rolston JD. Probabilistic comparison of gray and white matter coverage between depth and surface intracranial electrodes in epilepsy. Sci Rep 2021; 11:24155. [PMID: 34921176 PMCID: PMC8683494 DOI: 10.1038/s41598-021-03414-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/23/2021] [Indexed: 11/20/2022] Open
Abstract
In this study, we quantified the coverage of gray and white matter during intracranial electroencephalography in a cohort of epilepsy patients with surface and depth electrodes. We included 65 patients with strip electrodes (n = 12), strip and grid electrodes (n = 24), strip, grid, and depth electrodes (n = 7), or depth electrodes only (n = 22). Patient-specific imaging was used to generate probabilistic gray and white matter maps and atlas segmentations. Gray and white matter coverage was quantified using spherical volumes centered on electrode centroids, with radii ranging from 1 to 15 mm, along with detailed finite element models of local electric fields. Gray matter coverage was highly dependent on the chosen radius of influence (RoI). Using a 2.5 mm RoI, depth electrodes covered more gray matter than surface electrodes; however, surface electrodes covered more gray matter at RoI larger than 4 mm. White matter coverage and amygdala and hippocampal coverage was greatest for depth electrodes at all RoIs. This study provides the first probabilistic analysis to quantify coverage for different intracranial recording configurations. Depth electrodes offer increased coverage of gray matter over other recording strategies if the desired signals are local, while subdural grids and strips sample more gray matter if the desired signals are diffuse.
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Affiliation(s)
- Daria Nesterovich Anderson
- Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA. .,Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, UT, USA.
| | - Chantel M Charlebois
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA
| | - Elliot H Smith
- Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA
| | - Amir M Arain
- Department of Neurology, University of Utah, Salt Lake City, UT, USA
| | - Tyler S Davis
- Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA
| | - John D Rolston
- Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA. .,Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA.
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Tia B, Pifferi F. Oscillatory Activity in Mouse Lemur Primary Motor Cortex During Natural Locomotor Behavior. Front Syst Neurosci 2021; 15:655980. [PMID: 34220457 PMCID: PMC8249816 DOI: 10.3389/fnsys.2021.655980] [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: 01/19/2021] [Accepted: 05/17/2021] [Indexed: 11/29/2022] Open
Abstract
In arboreal environments, substrate orientation determines the biomechanical strategy for postural maintenance and locomotion. In this study, we investigated possible neuronal correlates of these mechanisms in an ancestral primate model, the gray mouse lemur. We conducted telemetric recordings of electrocorticographic activity in left primary motor cortex of two mouse lemurs moving on a branch-like small-diameter pole, fixed horizontally, or vertically. Analysis of cortical oscillations in high β (25–35 Hz) and low γ (35–50 Hz) bands showed stronger resting power on horizontal than vertical substrate, potentially illustrating sensorimotor processes for postural maintenance. Locomotion on horizontal substrate was associated with stronger event-related desynchronization than vertical substrate, which could relate to locomotor adjustments and/or derive from differences in baseline activity. Spectrograms of cortical activity showed modulation throughout individual locomotor cycles, with higher values in the first than second half cycle. However, substrate orientation did not significantly influence these variations. Overall, these results confirm that specific cortical mechanisms are solicited during arboreal locomotion, whereby mouse lemurs adjust cortical activity to substrate orientation during static posture and locomotion, and modulate this activity throughout locomotor cycles.
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6
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Giustiniani A, Battaglia G, Messina G, Morello H, Guastella S, Iovane A, Oliveri M, Palma A, Proia P. Transcranial Alternating Current Stimulation (tACS) Does Not Affect Sports People's Explosive Power: A Pilot Study. Front Hum Neurosci 2021; 15:640609. [PMID: 33994980 PMCID: PMC8116517 DOI: 10.3389/fnhum.2021.640609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 03/22/2021] [Indexed: 12/23/2022] Open
Abstract
Purpose: This study is aimed to preliminary investigate whether transcranial alternating current stimulation (tACS) could affect explosive power considering genetic background in sport subjects. Methods: Seventeen healthy sports volunteers with at least 3 years of sports activities participated in the experiment. After 2 weeks of familiarization performed without any stimulation, each participant received either 50 Hz-tACS or sham-tACS. Before and after stimulation, subjects performed the following tests: (1) the squat jump with the hands on the hips (SJ); (2) countermovement jump with the hands on the hips (CMJ); (3) countermovement jump with arm swing (CMJ-AS); (4) 15-s Bosco's test; (5) seated backward overhead medicine ball throw (SBOMBT); (6) seated chest pass throw (SCPT) with a 3-kg rubber medicine ball; and (7) hand-grip test. Additionally, saliva samples were collected from each participant. Genotyping analysis was carried out by polymerase chain reaction (PCR). Results: No significant differences were found in sport performance of subjects after 50 Hz-tACS. Additionally, we did not find any influence of genetic background on tACS-related effect on physical performance. These results suggest that tACS at gamma frequency is not able to induce an after-effect modulating sport performance. Further investigations with larger sample size are needed in order to understand the potential role of non-invasive brain stimulation techniques (NIBS) in motor performances. Conclusions: Gamma-tACS applied before the physical performance fails to improve explosive power in sport subjects.
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Affiliation(s)
- Andreina Giustiniani
- IRCCS San Camillo Hospital, Venice, Italy.,NEUROFARBA Department, University of Florence, Florence, Italy.,Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
| | - Giuseppe Battaglia
- Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
| | - Giuseppe Messina
- Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
| | - Hely Morello
- Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
| | | | - Angelo Iovane
- Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
| | - Massimiliano Oliveri
- Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
| | - Antonio Palma
- Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
| | - Patrizia Proia
- Sport and Exercise Sciences Research Unit, Department of Psychological, Pedagogical and Educational Sciences, University of Palermo, Palermo, Italy
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7
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Amo Usanos C, Boquete L, de Santiago L, Barea Navarro R, Cavaliere C. Induced Gamma-Band Activity during Actual and Imaginary Movements: EEG Analysis. SENSORS 2020; 20:s20061545. [PMID: 32168747 PMCID: PMC7146111 DOI: 10.3390/s20061545] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/03/2020] [Accepted: 03/10/2020] [Indexed: 11/16/2022]
Abstract
The purpose of this paper is to record and analyze induced gamma-band activity (GBA) (30-60 Hz) in cerebral motor areas during imaginary movement and to compare it quantitatively with activity recorded in the same areas during actual movement using a simplified electroencephalogram (EEG). Brain activity (basal activity, imaginary motor task and actual motor task) is obtained from 12 healthy volunteer subjects using an EEG (Cz channel). GBA is analyzed using the mean power spectral density (PSD) value. Event-related synchronization (ERS) is calculated from the PSD values of the basal GBA (GBAb), the GBA of the imaginary movement (GBAim) and the GBA of the actual movement (GBAac). The mean GBAim and GBAac values for the right and left hands are significantly higher than the GBAb value (p = 0.007). No significant difference is detected between mean GBA values during the imaginary and actual movement (p = 0.242). The mean ERS values for the imaginary movement (ERSimM (%) = 23.52) and for the actual movement (ERSacM = 27.47) do not present any significant difference (p = 0.117). We demonstrated that ERS could provide a useful way of indirectly checking the function of neuronal motor circuits activated by voluntary movement, both imaginary and actual. These results, as a proof of concept, could be applied to physiology studies, brain-computer interfaces, and diagnosis of cognitive or motor pathologies.
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Jiang T, Pellizzer G, Asman P, Bastos D, Bhavsar S, Tummala S, Prabhu S, Ince NF. Power Modulations of ECoG Alpha/Beta and Gamma Bands Correlate With Time-Derivative of Force During Hand Grasp. Front Neurosci 2020; 14:100. [PMID: 32116533 PMCID: PMC7033626 DOI: 10.3389/fnins.2020.00100] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 01/24/2020] [Indexed: 12/22/2022] Open
Abstract
It is well-known that motor cortical oscillatory components are modulated in their amplitude during voluntary and imagined movements. These patterns have been used to develop brain-machine interfaces (BMI) which focused mostly on movement kinematics. In contrast, there have been only a few studies on the relation between brain oscillatory activity and the control of force, in particular, grasping force, which is of primary importance for common daily activities. In this study, we recorded intraoperative high-density electrocorticography (ECoG) from the sensorimotor cortex of four patients while they executed a voluntary isometric hand grasp following verbal instruction. The grasp was held for 2 to 3 s before being instructed to relax. We studied the power modulations of neural oscillations during the whole time-course of the grasp (onset, hold, and offset phases). Phasic event-related desynchronization (ERD) in the low-frequency band (LFB) from 8 to 32 Hz and event-related synchronization (ERS) in the high-frequency band (HFB) from 60 to 200 Hz were observed at grasp onset and offset. However, during the grasp holding period, the magnitude of LFB-ERD and HFB-ERS decreased near or at the baseline level. Overall, LFB-ERD and HFB-ERS show phasic characteristics related to the changes of grasp force (onset/offset) in all four patients. More precisely, the fluctuations of HFB-ERS primarily, and of LFB-ERD to a lesser extent, correlated with the time-course of the first time-derivative of force (yank), rather than with force itself. To the best of our knowledge, this is the first study that establishes such a correlation. These results have fundamental implications for the decoding of grasp in brain oscillatory activity-based neuroprosthetics.
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Affiliation(s)
- Tianxiao Jiang
- Clinical Neural Engineering Lab, Biomedical Engineering Department, University of Houston, Houston, TX, United States
| | - Giuseppe Pellizzer
- Research Service, Minneapolis VA Health Care System, Departments of Neurology and Neuroscience, University of Minnesota, Minnesota, MN, United States
| | - Priscella Asman
- Clinical Neural Engineering Lab, Biomedical Engineering Department, University of Houston, Houston, TX, United States
| | - Dhiego Bastos
- Department of Neurosurgery, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Shreyas Bhavsar
- Department of Anesthesiology, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Sudhakar Tummala
- Department of Neurosurgery, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Sujit Prabhu
- Department of Neurosurgery, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Nuri F Ince
- Clinical Neural Engineering Lab, Biomedical Engineering Department, University of Houston, Houston, TX, United States
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9
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Weersink JB, Maurits NM, de Jong BM. EEG time-frequency analysis provides arguments for arm swing support in human gait control. Gait Posture 2019; 70:71-78. [PMID: 30826690 DOI: 10.1016/j.gaitpost.2019.02.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 01/31/2019] [Accepted: 02/22/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND Human gait benefits from arm swing, which requires four-limb co-ordination. The Supplementary Motor Area (SMA) is involved in multi-limb coordination. With its location anterior to the leg motor cortex and the pattern of its connections, this suggests a distinct role in gait control. RESEARCH QUESTION Is the SMA functionally implicated in gait-related arm swing? METHODS Ambulant electroencephalography (EEG) was employed during walking with and without arm swing in twenty healthy subjects (mean age: 64.9yrs, SD 7.2). Power changes across the EEG frequency spectrum were assessed by Event Related Spectral Perturbation (ERSP) analysis over both the putative SMA at electrode position Fz and additional sensorimotor regions. RESULTS During walking with arm swing, midline electrodes Fz and Cz showed a step-related pattern of Event Related Desynchronization (ERD) followed by Event Related Synchronization (ERS). Walking without arm swing was associated with significant ERD-ERS power reduction in the high-beta/low-gamma band over Fz and a power increase over Cz. Electrodes C3 and C4 revealed a pattern of ERD during contralateral- and ERS during ipsilateral leg swing. This ERD power decreased in gait without arm swing (low-frequency band). The ERSP pattern during walking with arm swing was similar at CP1 and CP2: ERD was seen during double support and the initial swing phase of the right leg, while a strong ERS emerged during the second half of the left leg's swing. Walking without arm swing showed a significant power reduction of this ERD-ERS pattern over CP2, while over CP1, ERS during left leg's swing turned into ERD. CONCLUSION The relation between arm swing in walking and a step-related ERD-ERS pattern in the high-beta/low-gamma band over the putative SMA, points at an SMA contribution to integrated cyclic anti-phase movements of upper- and lower limbs. This supports a cortical underpinning of arm swing support in gait control.
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Affiliation(s)
- Joyce B Weersink
- Department of Neurology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, POB 30.001, Groningen, the Netherlands
| | - Natasha M Maurits
- Department of Neurology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, POB 30.001, Groningen, the Netherlands
| | - Bauke M de Jong
- Department of Neurology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, POB 30.001, Groningen, the Netherlands.
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Zhang D, Ma H, Huang J, Zhang X, Ma H, Liu M. Exploring the impact of chronic high-altitude exposure on visual spatial attention using the ERP approach. Brain Behav 2018; 8:e00944. [PMID: 29761004 PMCID: PMC5943834 DOI: 10.1002/brb3.944] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 12/13/2017] [Accepted: 01/13/2018] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Previous studies have reported the slowing of reaction times to attentionally demanding tasks due to a reduction in cognitive resource as a result of chronic high-altitude exposure. However, it is still largely unknown whether this reaction slowness can be attributed to the attentional allocation change and/or response patterns. METHODS To clarify this issue, this study investigated attention-related (N2pc and N2 cc) and response-related (MP and RAP) event-related potentials (ERPs) to identify the performance of a visual search task by individuals who had lived in high-altitude areas for three years compared with those living at sea level. RESULTS This study showed that the reaction times in response to a visual search task were significantly longer in the high-altitude subjects than in the sea level subjects. Corresponding to this behavioral observation, we found a significantly lower N2pc amplitude and a larger N2 cc amplitude in the high-altitude subjects, suggesting a reduction in spatial attention allocation to the target (N2pc) in these subjects, indicating they need to work harder to preclude cross-talk between response selection and attention direction (N2 cc). Moreover, we also discovered higher MP amplitudes and longer RAP latencies in the high-altitude subjects, which further indicated that these subjects were slower and required greater cortical activation while preparing and executing correctly selected responses (MP and RAP). CONCLUSION Nevertheless, this study collectively provided new insights into the attention reaction slowness from high-altitude exposure.
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Affiliation(s)
- Delong Zhang
- Center for the Study of Applied Psychology Key Laboratory of Mental Health and Cognitive Science of Guangdong Province School of Psychology South China Normal University Guangzhou China.,Plateau Brain Science Research Center South China Normal University/Tibet University Guangzhou China.,Institute for Brain Research and Rehabilitation South China Normal University Guangzhou China
| | - Hailin Ma
- Center for the Study of Applied Psychology Key Laboratory of Mental Health and Cognitive Science of Guangdong Province School of Psychology South China Normal University Guangzhou China.,Plateau Brain Science Research Center South China Normal University/Tibet University Guangzhou China
| | - Jiaqun Huang
- Plateau Brain Science Research Center South China Normal University/Tibet University Guangzhou China
| | - Xinjuan Zhang
- Plateau Brain Science Research Center South China Normal University/Tibet University Guangzhou China
| | - Huifang Ma
- Department of Primary Education Lhasa Normal College Tibet China
| | - Ming Liu
- Center for the Study of Applied Psychology Key Laboratory of Mental Health and Cognitive Science of Guangdong Province School of Psychology South China Normal University Guangzhou China.,Plateau Brain Science Research Center South China Normal University/Tibet University Guangzhou China.,Institute for Brain Research and Rehabilitation South China Normal University Guangzhou China
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11
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Abstract
PURPOSE OF REVIEW An increase in oscillatory activity in the γ-frequency band (approximately 50-100 Hz) has long been noted during human movement. However, its functional role has been difficult to elucidate. The advent of novel techniques, particularly transcranial alternating current stimulation (tACS), has dramatically increased our ability to study γ oscillations. Here, we review our current understanding of the role of γ oscillations in the human motor cortex, with reference to γ activity outside the motor system, and evidence from animal models. RECENT FINDINGS Evidence for the neurophysiological basis of human γ oscillations is beginning to emerge. Multimodal studies, essential given the necessarily indirect measurements acquired in humans, are beginning to provide convergent evidence for the role of γ oscillations in movement, and their relationship to plasticity. SUMMARY Human motor cortical γ oscillations appear to play a key role in movement, and relate to learning. However, there are still major questions to be answered about their physiological basis and precise role in human plasticity. It is to be hoped that future research will take advantage of recent technical advances and the physiological basis and functional significance of this intriguing and important brain rhythm will be fully elucidated.
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Affiliation(s)
- Magdalena Nowak
- Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, OX3 9DU UK
- Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Department of Psychiatry, University of Oxford, Oxford, OX3 7JX UK
| | - Catharina Zich
- Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, OX3 9DU UK
- Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Department of Psychiatry, University of Oxford, Oxford, OX3 7JX UK
| | - Charlotte J. Stagg
- Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, OX3 9DU UK
- Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Department of Psychiatry, University of Oxford, Oxford, OX3 7JX UK
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Di Giorgio Silva LW, Aprigio D, Di Giacomo J, Gongora M, Budde H, Bittencourt J, Cagy M, Teixeira S, Ribeiro P, de Carvalho MR, Freire R, Nardi AE, Basile LF, Velasques B. How high level of anxiety in Panic Disorder can interfere in working memory? A computer simulation and electrophysiological investigation. J Psychiatr Res 2017; 95:238-246. [PMID: 28918162 DOI: 10.1016/j.jpsychires.2017.08.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 08/21/2017] [Accepted: 08/24/2017] [Indexed: 12/23/2022]
Abstract
Panic disorder (PD) is characterized by repeated and unexpected attacks of intense anxiety, which are not restricted to a determined situation or circumstance. The coherence function has been used to investigate the communication among brain structures through the quantitative EEG (qEEG). The objective of this study is to analyze if there is a difference in frontoparietal gamma coherence (GC) between panic disorder patients (PDP) and healthy controls (HC) during the Visual oddball paradigm; and verify if high levels of anxiety (produced by a computer simulation) affect PDP's working memory. Nine PDP (9 female with average age of 48.8, SD: 11.16) and ten HC (1 male and 9 female with average age of 38.2, SD: 13.69) were enrolled in this study. The subjects performed the visual oddball paradigm simultaneously to the EEG record before and after the presentation of computer simulation (CS). A two-way ANOVA was applied to analyze the factors Group and the Moment for each pair of electrodes separately, and another one to analyze the reaction time variable. We verified a F3-P3 GC increased after the CS movie, demonstrating the left hemisphere participation during the anxiety processing. The greater GC in HC observed in the frontal and parietal areas (P3-Pz, F4-F8 and Fp2-F4) points to the participation of these areas with the expected behavior. The greater GC in PDP for F7-F3 and F4-P4 pairs of electrodes assumes that it produces a prejudicial "noise" during information processing, and can be associated to interference on the communication between frontal and parietal areas. This "noise" during information processing is related to PD symptoms, which should be better known in order to develop effective treatment strategies.
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Affiliation(s)
- Luiza Wanick Di Giorgio Silva
- Neurophysiology and Neuropsychology of Attention Laboratory, Institute of Psychiatry of the Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, RJ, Brazil.
| | - Danielle Aprigio
- Neurophysiology and Neuropsychology of Attention Laboratory, Institute of Psychiatry of the Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, RJ, Brazil
| | - Jesse Di Giacomo
- Brain Mapping and Sensory Motor Integration Laboratory, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
| | - Mariana Gongora
- Brain Mapping and Sensory Motor Integration Laboratory, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil; Institute of Applied Neuroscience (INA), Rio de Janeiro, Brazil
| | - Henning Budde
- Faculty of Human Sciences, Medical School Hamburg, Hamburg, Germany; Sport Science, Reykjavik University, Reykjavik, Iceland; Lithuanian Sports University, Kaunas, Lithuania
| | - Juliana Bittencourt
- Neurophysiology and Neuropsychology of Attention Laboratory, Institute of Psychiatry of the Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, RJ, Brazil; Veiga de Almeida University, Rio de Janeiro, Brazil; Institute of Applied Neuroscience (INA), Rio de Janeiro, Brazil
| | - Mauricio Cagy
- Biomedical Engineering Program, COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Silmar Teixeira
- Brain Mapping and Plasticity Laboratory, Federal University of Piauí (UFPI), Parnaíba, Brazil; Biomedical Sciences, Federal University of Piauí (UFPI), Parnaíba, Brazil
| | - Pedro Ribeiro
- Brain Mapping and Sensory Motor Integration Laboratory, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil; Institute of Applied Neuroscience (INA), Rio de Janeiro, Brazil; Bioscience Department (EEFD/ UFRJ), School of Physical Education, Rio de Janeiro, Brazil
| | - Marcele Regine de Carvalho
- Laboratory of Panic & Respiration, Institute of Psychiatry, Federal University of Rio de Janeiro, Brazil
| | - Rafael Freire
- Laboratory of Panic & Respiration, Institute of Psychiatry, Federal University of Rio de Janeiro, Brazil
| | - Antonio Egidio Nardi
- Laboratory of Panic & Respiration, Institute of Psychiatry, Federal University of Rio de Janeiro, Brazil
| | - Luis Fernando Basile
- Division of Neurosurgery, University of São Paulo Medical School, Brazil; Laboratory of Psychophysiology, Department of Psychology and Phonoaudiology, UMESP, Brazil
| | - Bruna Velasques
- Neurophysiology and Neuropsychology of Attention Laboratory, Institute of Psychiatry of the Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, RJ, Brazil; Institute of Applied Neuroscience (INA), Rio de Janeiro, Brazil; Bioscience Department (EEFD/ UFRJ), School of Physical Education, Rio de Janeiro, Brazil
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Flouty O, Reddy C, Holland M, Kovach C, Kawasaki H, Oya H, Greenlee J, Hitchon P, Howard M. Precision surgery of rolandic glioma and insights from extended functional mapping. Clin Neurol Neurosurg 2017; 163:60-66. [PMID: 29073500 DOI: 10.1016/j.clineuro.2017.10.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/06/2017] [Accepted: 10/09/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Electrical cortical stimulation mapping (ECSM) is the current gold standard functional mapping technique; however, it is burdened by several limitations. Our objective in this study is to show that extended functional mapping modalities can (1) allow neurosurgeons to map and preserve eloquent regions that are inaccessible by the traditional ECSM technique and (2) factor into the operative decision-making process and surgical trajectory during resection of Rolandic brain tumors. PATIENTS AND METHODS A 55year old patient having a right Rolandic glioblastoma underwent subdural grid implantation followed by surgical resection. Multimodal functional mapping including electrical stimulation, high gamma power mapping, functional magnetic resonance imaging, and diffusion tensor imaging were performed to define the location of the patient's eloquent cortex and white matter tracts in relation to the tumor and determine the optimal surgical trajectory prior to resection. RESULTS The patient tolerated a safe surgical resection without any new postoperative deficits. ECSM mapping successfully delineated safe areas for resection as well as eloquent areas related to motor control and speech production. High gamma power analysis successfully mapped areas involved in arm reach. Functional MRI showed the regions related to finger tapping. DTI demonstrated the corticospinal tract and its relation to the hand motor cortex and the tumor. CONCLUSION Adjunct mapping techniques used to supplement the data offered by ECSM can help advance the field of functional mapping and Rolandic surgery via broadening our accessibility to the human brain and providing a comprehensive map of eloquent grey and white matter structures and their relation to the tumor.
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Affiliation(s)
- Oliver Flouty
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA.
| | - Chandan Reddy
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Marshall Holland
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Christopher Kovach
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Hiroto Kawasaki
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Hiroyuki Oya
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Jeremy Greenlee
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Patrick Hitchon
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Matthew Howard
- Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
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Bočková M, Chládek J, Jurák P, Halámek J, Rapcsak SZ, Baláž M, Chrastina J, Rektor I. Oscillatory reactivity to effortful cognitive processing in the subthalamic nucleus and internal pallidum: a depth electrode EEG study. J Neural Transm (Vienna) 2017; 124:841-852. [DOI: 10.1007/s00702-017-1719-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Accepted: 03/27/2017] [Indexed: 10/19/2022]
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15
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Lebar N, Danna J, Moré S, Mouchnino L, Blouin J. On the neural basis of sensory weighting: Alpha, beta and gamma modulations during complex movements. Neuroimage 2017; 150:200-212. [DOI: 10.1016/j.neuroimage.2017.02.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/26/2017] [Accepted: 02/15/2017] [Indexed: 10/20/2022] Open
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Arnfred SM, Raballo A, Morup M, Parnas J. Self-disorder and brain processing of proprioception in schizophrenia spectrum patients: a re-analysis. Psychopathology 2015; 48:60-4. [PMID: 25401765 DOI: 10.1159/000366081] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 07/19/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND Anomalies of self-awareness (self-disorders, SDs) are theorized to be basic to schizophrenia psychopathology. We have previously observed dysfunction of brain processing of proprioception in schizophrenia spectrum disorders (SZS). We hypothesized that SDs could be associated with abnormalities of early contralateral proprioceptive evoked oscillatory brain activity. METHODS We investigated the association between proprioceptive evoked potential components and SDs in a re-analysis of data from a subsample (n = 12) of SZS patients who had previously been observed with deviant proprioceptive evoked potentials and interviewed with the Examination of Anomalous Self-Experience (EASE) scale. RESULTS Higher EASE scores (i.e. increased SD) were associated with lower peak parietal gamma frequencies and higher peak beta amplitudes over frontal and parietal electrodes in the left hemisphere following right-hand proprioceptive stimulation. CONCLUSION Disorders of self-awareness may be associated with dysfunction of early phases of somatosensory processing. The findings are potentially relevant to our understanding of the pathophysiology of schizophrenia, but further studies are needed.
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Affiliation(s)
- Sidse M Arnfred
- Psychiatric Center Hvidovre, University Hospital of Copenhagen, Copenhagen, Denmark
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Bočková M, Chládek J, Jurák P, Halámek J, Štillová K, Baláž M, Chrastina J, Rektor I. Complex Motor–Cognitive Factors Processed in the Anterior Nucleus of the Thalamus: An Intracerebral Recording Study. Brain Topogr 2014; 28:269-78. [DOI: 10.1007/s10548-014-0373-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 04/27/2014] [Indexed: 11/30/2022]
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18
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Cortical reorganization after hand immobilization: the beta qEEG spectral coherence evidences. PLoS One 2013. [PMID: 24278213 DOI: 10.1371/journal.pone.0079912.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
There is increasing evidence that hand immobilization is associated with various changes in the brain. Indeed, beta band coherence is strongly related to motor act and sensitive stimuli. In this study we investigate the electrophysiological and cortical changes that occur when subjects are submitted to hand immobilization. We hypothesized that beta coherence oscillations act as a mechanism underlying inter- and intra-hemispheric changes. As a methodology for our study fifteen healthy individuals between the ages of 20 and 30 years were subjected to a right index finger task before and after hand immobilization while their brain activity pattern was recorded using quantitative electroencephalography. This analysis revealed that hand immobilization caused changes in frontal, central and parietal areas of the brain. The main findings showed a lower beta-2 band in frontal regions and greater cortical activity in central and parietal areas. In summary, the coherence increased in the frontal, central and parietal cortex, due to hand immobilization and it adjusted the brains functioning, which had been disrupted by the procedure. Moreover, the brain adaptation upon hand immobilization of the subjects involved inter- and intra-hemispheric changes.
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Fortuna M, Teixeira S, Machado S, Velasques B, Bittencourt J, Peressutti C, Budde H, Cagy M, Nardi AE, Piedade R, Ribeiro P, Arias-Carrión O. Cortical reorganization after hand immobilization: the beta qEEG spectral coherence evidences. PLoS One 2013; 8:e79912. [PMID: 24278213 PMCID: PMC3838376 DOI: 10.1371/journal.pone.0079912] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 10/06/2013] [Indexed: 11/22/2022] Open
Abstract
There is increasing evidence that hand immobilization is associated with various changes in the brain. Indeed, beta band coherence is strongly related to motor act and sensitive stimuli. In this study we investigate the electrophysiological and cortical changes that occur when subjects are submitted to hand immobilization. We hypothesized that beta coherence oscillations act as a mechanism underlying inter- and intra-hemispheric changes. As a methodology for our study fifteen healthy individuals between the ages of 20 and 30 years were subjected to a right index finger task before and after hand immobilization while their brain activity pattern was recorded using quantitative electroencephalography. This analysis revealed that hand immobilization caused changes in frontal, central and parietal areas of the brain. The main findings showed a lower beta-2 band in frontal regions and greater cortical activity in central and parietal areas. In summary, the coherence increased in the frontal, central and parietal cortex, due to hand immobilization and it adjusted the brains functioning, which had been disrupted by the procedure. Moreover, the brain adaptation upon hand immobilization of the subjects involved inter- and intra-hemispheric changes.
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Affiliation(s)
- Marina Fortuna
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
| | - Silmar Teixeira
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
- Institute of Applied Neuroscience (INA), Rio de Janeiro, Brazil
- Laboratory of Physical Therapy, Veiga de Almeida University, Rio de Janeiro, Brazil
- Physical Therapy Department, Piquet Carneiro Policlinic, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - Sérgio Machado
- Panic and Respiration, Institute of Psychiatry of Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- National Institute for Translational Medicine (INCT-TM), Rio de Janeiro, Brazil
- Quiropraxia Program of the Faculty of Health Sciences, Central University, Santiago, Chile
- Physical Activity Neuroscience, Physical Activity Sciences Postgraduate Program – Salgado de Oliveira University, Niterói, Brazil
- Institute of Phylosophy, Federal University of Uberlândia (IFILO/UFU), Rio de Janeiro, Brazil
| | - Bruna Velasques
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
- Institute of Applied Neuroscience (INA), Rio de Janeiro, Brazil
| | - Juliana Bittencourt
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
| | - Caroline Peressutti
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
| | - Henning Budde
- Medical School Hamburg, University of applied science and Medical University. Hamburg, Germany
| | - Mauricio Cagy
- Division of Epidemiology and Biostatistic, Institute of Health Community, Federal Fluminense University (UFF), Rio de Janeiro, Brazil
| | - Antonio E. Nardi
- Panic and Respiration, Institute of Psychiatry of Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Roberto Piedade
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
| | - Pedro Ribeiro
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, Brazil
- School of Physical Education, Bioscience Department (EEFD/UFRJ), Rio de Janeiro, Brazil
- Institute of Applied Neuroscience (INA), Rio de Janeiro, Brazil
| | - Oscar Arias-Carrión
- Movement Disorders and Transcranial Magnetic Stimulation Unit, Hospital General Dr. Manuel Gea González, México D.F., México
- Neurology department, Hospital General Ajusco Medio, México D.F., México
- * E-mail:
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Suntrup S, Teismann I, Wollbrink A, Winkels M, Warnecke T, Flöel A, Pantev C, Dziewas R. Magnetoencephalographic evidence for the modulation of cortical swallowing processing by transcranial direct current stimulation. Neuroimage 2013; 83:346-54. [PMID: 23800793 DOI: 10.1016/j.neuroimage.2013.06.055] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/25/2013] [Accepted: 06/17/2013] [Indexed: 12/12/2022] Open
Abstract
Swallowing is a complex neuromuscular task that is processed within multiple regions of the human brain. Rehabilitative treatment options for dysphagia due to neurological diseases are limited. Because the potential for adaptive cortical changes in compensation of disturbed swallowing is recognized, neuromodulation techniques like transcranial direct current stimulation (tDCS) are currently considered as a treatment option. Here we evaluate the effect of tDCS on cortical swallowing network activity and behavior. In a double-blind crossover study, anodal tDCS (20 min, 1 mA) or sham stimulation was administered over the left or right swallowing motor cortex in 21 healthy subjects in separate sessions. Cortical activation was measured using magnetoencephalography (MEG) before and after tDCS during cued "simple", "fast" and "challenged" swallow tasks with increasing levels of difficulty. Swallowing response times and accuracy were measured. Significant bilateral enhancement of cortical swallowing network activation was found in the theta frequency range after left tDCS in the fast swallow task (p=0.006) and following right tDCS in the challenged swallow task (p=0.007), but not after sham stimulation. No relevant behavioral effects were observed on swallow response time, but swallow precision improved after left tDCS (p<0.05). Anodal tDCS applied over the swallowing motor cortex of either hemisphere was able to increase bilateral swallow-related cortical network activation in a frequency specific manner. These neuroplastic effects were associated with subtle behavioral gains during complex swallow tasks in healthy individuals suggesting that tDCS deserves further evaluation as a treatment tool for dysphagia.
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Affiliation(s)
- Sonja Suntrup
- Institute for Biomagnetism and Biosignal Analysis, University of Muenster, Malmedyweg 15, 48149 Muenster, Germany; Department of Neurology, University of Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149 Münster, Germany.
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Su DK, Ojemann JG. Electrocorticographic sensorimotor mapping. Clin Neurophysiol 2013; 124:1044-8. [PMID: 23601701 DOI: 10.1016/j.clinph.2013.02.114] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 02/25/2013] [Accepted: 02/27/2013] [Indexed: 11/18/2022]
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22
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Bočková M, Chládek J, Šímová L, Jurák P, Halámek J, Rektor I. Oscillatory changes in cognitive networks activated during a three-stimulus visual paradigm: An intracerebral study. Clin Neurophysiol 2013; 124:283-91. [DOI: 10.1016/j.clinph.2012.07.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 07/10/2012] [Accepted: 07/14/2012] [Indexed: 10/28/2022]
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23
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Vansteensel MJ, Bleichner MG, Dintzner LT, Aarnoutse EJ, Leijten FSS, Hermes D, Ramsey NF. Task-free electrocorticography frequency mapping of the motor cortex. Clin Neurophysiol 2013; 124:1169-74. [PMID: 23340046 DOI: 10.1016/j.clinph.2012.08.048] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 07/03/2012] [Accepted: 08/30/2012] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Electrocortical stimulation mapping (ESM) is the current gold standard for functional mapping of the eloquent cortex prior to epilepsy surgery. The procedure is, however, time-consuming and quite demanding for patients. Electrocorticography frequency mapping (ECoG mapping) has been suggested as an adjunct method. Here, we investigated whether it is possible to perform mapping of motor regions using ECoG data of spontaneous movements. METHODS Using the video registration of seven epilepsy patients who underwent electrocorticography and ESM, we selected periods of spontaneous hand and arm movements and periods of rest. Frequency analysis was performed, and electrodes showing a significant change in power (4-7, 8-14, 15-25, 26-45 or 65-95 Hz) were compared with those being identified as relevant for hand and/or arm movement by ESM. RESULTS All frequency bands showed a high specificity (>0.80), and the 65-95 Hz frequency band additionally had a high sensitivity (0.82) for identifying ESM positive electrodes. CONCLUSIONS Our data show a good match between ECoG mapping of spontaneous movements and ESM data. SIGNIFICANCE The accurate match suggests that ECoG mapping of the motor cortex using spontaneous movements may be a valuable complement to ESM, especially when other options requiring patient cooperation fail.
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Affiliation(s)
- M J Vansteensel
- Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Department of Neurology and Neurosurgery, Section Brain Function and Plasticity, Utrecht, The Netherlands.
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Guo X, Xiang J, Wang Y, O’Brien H, Kabbouche M, Horn P, Powers SW, Hershey AD. Aberrant neuromagnetic activation in the motor cortex in children with acute migraine: a magnetoencephalography study. PLoS One 2012. [PMID: 23185541 PMCID: PMC3502360 DOI: 10.1371/journal.pone.0050095] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Migraine attacks have been shown to interfere with normal function in the brain such as motor or sensory function. However, to date, there has been no clinical neurophysiology study focusing on the motor function in children with migraine during headache attacks. To investigate the motor function in children with migraine, twenty-six children with acute migraine, meeting International Classification of Headache Disorders criteria and age- and gender-matched healthy children were studied using a 275-channel magnetoencephalography system. A finger-tapping paradigm was designed to elicit neuromagnetic activation in the motor cortex. Children with migraine showed significantly prolonged latency of movement-evoked magnetic fields (MEF) during finger movement compared with the controls. The correlation coefficient of MEF latency and age in children with migraine was significantly different from that in healthy controls. The spectral power of high gamma (65–150 Hz) oscillations during finger movement in the primary motor cortex is also significantly higher in children with migraine than in controls. The alteration of responding latency and aberrant high gamma oscillations suggest that the developmental trajectory of motor function in children with migraine is impaired during migraine attacks and/or developmentally delayed. This finding indicates that childhood migraine may affect the development of brain function and result in long-term problems.
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Affiliation(s)
- Xinyao Guo
- Department of Human Anatomy and Histology-Embryology, Xi'an Jiaotong University, School of Medicine, Xi'an, Shaanxi, People’s Republic of China
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Jing Xiang
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- Department of Neurology, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
- * E-mail:
| | - Yingying Wang
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Hope O’Brien
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- Department of Neurology, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
| | - Marielle Kabbouche
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- Department of Neurology, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
| | - Paul Horn
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- Department of Mathematical Sciences, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Scott W. Powers
- Department of Behavioral Medicine and Clinical Psychology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Andrew D. Hershey
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- Department of Neurology, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
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Amenedo E, Lorenzo-López L, Pazo-Álvarez P. Response processing during visual search in normal aging: The need for more time to prevent cross talk between spatial attention and manual response selection. Biol Psychol 2012; 91:201-11. [DOI: 10.1016/j.biopsycho.2012.06.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 05/29/2012] [Accepted: 06/17/2012] [Indexed: 11/30/2022]
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van Wijk BCM, Beek PJ, Daffertshofer A. Neural synchrony within the motor system: what have we learned so far? Front Hum Neurosci 2012; 6:252. [PMID: 22969718 PMCID: PMC3432872 DOI: 10.3389/fnhum.2012.00252] [Citation(s) in RCA: 154] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 08/17/2012] [Indexed: 11/26/2022] Open
Abstract
Synchronization of neural activity is considered essential for information processing in the nervous system. Both local and inter-regional synchronization are omnipresent in different frequency regimes and relate to a variety of behavioral and cognitive functions. Over the years, many studies have sought to elucidate the question how alpha/mu, beta, and gamma synchronization contribute to motor control. Here, we review these studies with the purpose to delineate what they have added to our understanding of the neural control of movement. We highlight important findings regarding oscillations in primary motor cortex, synchronization between cortex and spinal cord, synchronization between cortical regions, as well as abnormal synchronization patterns in a selection of motor dysfunctions. The interpretation of synchronization patterns benefits from combining results of invasive and non-invasive recordings, different data analysis tools, and modeling work. Importantly, although synchronization is deemed to play a vital role, it is not the only mechanism for neural communication. Spike timing and rate coding act together during motor control and should therefore both be accounted for when interpreting movement-related activity.
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Affiliation(s)
- Bernadette C. M. van Wijk
- MOVE Research Institute, Faculty of Human Movement Sciences, VU University AmsterdamAmsterdam, Netherlands
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Findlay AM, Ambrose JB, Cahn-Weiner DA, Houde JF, Honma S, Hinkley LBN, Berger MS, Nagarajan SS, Kirsch HE. Dynamics of hemispheric dominance for language assessed by magnetoencephalographic imaging. Ann Neurol 2012; 71:668-86. [PMID: 22522481 DOI: 10.1002/ana.23530] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE The goal of the current study was to examine the dynamics of language lateralization using magnetoencephalographic (MEG) imaging, to determine the sensitivity and specificity of MEG imaging, and to determine whether MEG imaging can become a viable alternative to the intracarotid amobarbital procedure (IAP), the current gold standard for preoperative language lateralization in neurosurgical candidates. METHODS MEG was recorded during an auditory verb generation task and imaging analysis of oscillatory activity was initially performed in 21 subjects with epilepsy, brain tumor, or arteriovenous malformation who had undergone IAP and MEG. Time windows and brain regions of interest that best discriminated between IAP-determined left or right dominance for language were identified. Parameters derived in the retrospective analysis were applied to a prospective cohort of 14 patients and healthy controls. RESULTS Power decreases in the beta frequency band were consistently observed following auditory stimulation in inferior frontal, superior temporal, and parietal cortices; similar power decreases were also seen in inferior frontal cortex prior to and during overt verb generation. Language lateralization was clearly observed to be a dynamic process that is bilateral for several hundred milliseconds during periods of auditory perception and overt speech production. Correlation with the IAP was seen in 13 of 14 (93%) prospective patients, with the test demonstrating a sensitivity of 100% and specificity of 92%. INTERPRETATION Our results demonstrate excellent correlation between MEG imaging findings and the IAP for language lateralization, and provide new insights into the spatiotemporal dynamics of cortical speech processing.
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Affiliation(s)
- Anne M Findlay
- Department of Radiology and Biomedical Imaging, University of California at San Francisco, USA
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Muthukumaraswamy SD. Temporal dynamics of primary motor cortex γ oscillation amplitude and piper corticomuscular coherence changes during motor control. Exp Brain Res 2011; 212:623-33. [PMID: 21701903 DOI: 10.1007/s00221-011-2775-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 06/15/2011] [Indexed: 01/27/2023]
Abstract
In recent years, the use of non-invasive techniques (EEG/MEG) to measure the ~80 Hz ("gamma") oscillations generated by the primary motor cortex during motor control has been well validated. However, primary motor cortex gamma oscillations have yet to be systematically compared with lower frequency (30-50 Hz, 'piper') corticomuscular coherence in the same tasks. In this paper, primary cortex gamma oscillations and piper corticomuscular coherence are compared for three types of movements: simple abductions of the index finger, repetitive abductions of the index finger of different extents and frequencies and static abduction of the index finger at two different force levels. For simple movements, piper coherence and gamma amplitude followed very similar time courses with coherence appearing at approximately half the frequency of cortical gamma oscillations. No evidence of 2:1 phase-phase coupling was observed. A similar pattern of results was observed for repetitive movements varying in size and frequency; however, during the production of static force, the time courses became dissociated. During these movements, EMG piper amplitude was sustained for the entire contraction; gamma power showed a burst at onset but no piper corticomuscular coherence was observed. For these data, this dissociation suggests that while primary motor cortex gamma oscillations and piper corticomuscular coherence may often co-occur during the production of dynamic movements, they probably reflect different functional processes in motor control.
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Nagasawa T, Rothermel R, Juhász C, Fukuda M, Nishida M, Akiyama T, Sood S, Asano E. Cortical gamma-oscillations modulated by auditory-motor tasks-intracranial recording in patients with epilepsy. Hum Brain Mapp 2011; 31:1627-42. [PMID: 20143383 DOI: 10.1002/hbm.20963] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human activities often involve hand-motor responses following external auditory-verbal commands. It has been believed that hand movements are predominantly driven by the contralateral primary sensorimotor cortex, whereas auditory-verbal information is processed in both superior temporal gyri. It remains unknown whether cortical activation in the superior temporal gyrus during an auditory-motor task is affected by laterality of hand-motor responses. Here, event-related γ-oscillations were intracranially recorded as quantitative measures of cortical activation; we determined how cortical structures were activated by auditory-cued movement using each hand in 15 patients with focal epilepsy. Auditory-verbal stimuli elicited augmentation of γ-oscillations in a posterior portion of the superior temporal gyrus, whereas hand-motor responses elicited γ-augmentation in the pre- and postcentral gyri. The magnitudes of such γ-augmentation in the superior temporal, precentral, and postcentral gyri were significantly larger when the hand contralateral to the recorded hemisphere was required to be used for motor responses, compared with when the ipsilateral hand was. The superior temporal gyrus in each hemisphere might play a greater pivotal role when the contralateral hand needs to be used for motor responses, compared with when the ipsilateral hand does.
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Affiliation(s)
- Tetsuro Nagasawa
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit Medical Center, Detroit, Michigan 48201, USA
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Teixeira S, Velasques B, Machado S, Paes F, Cunha M, Budde H, Anghinah R, Basile LFH, Cagy M, Piedade R, Ribeiro P. Gamma band oscillations in parietooccipital areas during performance of a sensorimotor integration task: a qEEG coherence study. ARQUIVOS DE NEURO-PSIQUIATRIA 2011; 69:304-9. [PMID: 21625755 DOI: 10.1590/s0004-282x2011000300007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Accepted: 11/11/2010] [Indexed: 11/21/2022]
Abstract
This study aimed to elucidate cortical mechanisms involved in anticipatory actions when 23 healthy right-handed subjects had to catch a free falling object through quantitative electroencephalogram (qEEG). For this reason, we used coherence that represents a measurement of linear covariation between two signals in the frequency domain. In addition, we investigated gamma-band (30-100 Hz) activity that is related to cognitive and somatosensory processes. We hypothesized that gamma coherence will be increase in both parietal and occipital areas during moment after ball drop, due to their involvement in manipulation of objects, visuospatial processing, visual perception, stimuli identification and attention processes. We confirmed our hypothesis, an increase in gamma coherence on P3-P4 (t= -2.15; p=0.033) and PZ-OZ (t= -2.16; p=0.034) electrode pairs was verified for a paired t-test. We conclude that to execute tasks involving anticipatory movements (feedforward mechanisms), like our own task, probably, there is no need of a strong participation of visual areas in the process of information organization to manipulate objects and to process visuospatial information regarding the contact hand-object.
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Affiliation(s)
- S Teixeira
- Federal University of Rio de Janeiro, Brazil
| | - B Velasques
- Federal University of Rio de Janeiro, Brazil; Institute of Applied Neuroscience, Brazil
| | - S Machado
- Federal University of Rio de Janeiro, Brazil; Institute of Applied Neuroscience, Brazil
| | - F Paes
- Federal University of Rio de Janeiro, Brazil; Brazilian Institute of Medicine and Rehabilitation, Brazil
| | - M Cunha
- Federal University of Rio de Janeiro, Brazil; Institute of Applied Neuroscience, Brazil; Federal University of Vale do São Francisco, Brazil
| | - H Budde
- Humboldt Universität zu Berlin, Germany
| | - R Anghinah
- University of São Paulo Medical School, Brazil
| | - L F H Basile
- University of São Paulo Medical School, Brazil; UMESP, Brazil
| | - M Cagy
- Federal Fluminense University, Brazil
| | - R Piedade
- Federal University of Rio de Janeiro, Brazil
| | - P Ribeiro
- Federal University of Rio de Janeiro, Brazil; UFRJ, Brazil; Institute of Applied Neuroscience, Brazil
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Teixeira S, Velasques B, Machado S, Cunha M, Domingues CA, Budde H, Anghinah R, Basile LF, Cagy M, Piedade R, Ribeiro P. Gamma-band oscillations in fronto-central areas during performance of a sensorimotor integration task: A qEEG coherence study. Neurosci Lett 2010; 483:114-7. [DOI: 10.1016/j.neulet.2010.07.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2010] [Revised: 07/05/2010] [Accepted: 07/25/2010] [Indexed: 10/19/2022]
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Muthukumaraswamy SD. Functional properties of human primary motor cortex gamma oscillations. J Neurophysiol 2010; 104:2873-85. [PMID: 20884762 DOI: 10.1152/jn.00607.2010] [Citation(s) in RCA: 193] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Gamma oscillations in human primary motor cortex (M1) have been described in human electrocorticographic and noninvasive magnetoencephalographic (MEG)/electroencephalographic recordings, yet their functional significance within the sensorimotor system remains unknown. In a set of four MEG experiments described here a number of properties of these oscillations are elucidated. First, gamma oscillations were reliably localized by MEG in M1 and reached peak amplitude 137 ms after electromyographic onset and were not affected by whether movements were cued or self-paced. Gamma oscillations were found to be stronger for larger movements but were absent during the sustained part of isometric movements, with no finger movement or muscle shortening. During repetitive movement sequences gamma oscillations were greater for the first movement of a sequence. Finally, gamma oscillations were absent during passive shortening of the finger compared with active contractions sharing similar kinematic properties demonstrating that M1 oscillations are not simply related to somatosensory feedback. This combined pattern of results is consistent with gamma oscillations playing a role in a relatively late stage of motor control, encoding information related to limb movement rather than to muscle contraction.
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Affiliation(s)
- Suresh D Muthukumaraswamy
- Cardiff University Brain Research Imaging Centre, School of Psychology, Cardiff University, Cardiff, UK.
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Huo X, Xiang J, Wang Y, Kirtman EG, Kotecha R, Fujiwara H, Hemasilpin N, Rose DF, Degrauw T. Gamma oscillations in the primary motor cortex studied with MEG. Brain Dev 2010; 32:619-24. [PMID: 19836911 DOI: 10.1016/j.braindev.2009.09.021] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Revised: 09/17/2009] [Accepted: 09/19/2009] [Indexed: 11/29/2022]
Abstract
In recent years, there has been a growing interest on the role of gamma band (>30 Hz) neural oscillations in motor control, although the function of this activity in motor control is unknown clearly. With the goal of discussing the high frequency sources non-invasively and precisely during unilateral index finger movement, we investigated gamma band oscillations in 20 right-handed normal adults with magnetoencephalography (MEG). The results showed that gamma band activity appeared only during finger movement. Nineteen subjects displayed consistently contralateral event-related synchronization (C-ERS) within high gamma band (70-150 Hz) in primary motor cortex (M1) of both hemispheres. Interestingly, 15 subjects displayed ipsilateral event-related desynchronization (I-ERD) and C-ERS within broad gamma band (30-150 Hz). The locations of the broad gamma band I-ERD and C-ERS revealed hemispherical symmetry in M1. These findings demonstrate that there are consistent high gamma C-ERS and inconsistent low gamma I-ERD during a simple finger movement in the motor cortex. This study provides new evidence for the use of high gamma frequency oscillations as biomarkers in the analyses of functional brain activity and the localization of the motor cortex.
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Affiliation(s)
- Xiaolin Huo
- Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.
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High Gamma Oscillations of Sensorimotor Cortex During Unilateral Movement in the Developing Brain: a MEG Study. Brain Topogr 2010; 23:375-84. [DOI: 10.1007/s10548-010-0151-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Accepted: 06/16/2010] [Indexed: 10/19/2022]
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Fukuda M, Juhász C, Hoechstetter K, Sood S, Asano E. Somatosensory-related gamma-, beta- and alpha-augmentation precedes alpha- and beta-attenuation in humans. Clin Neurophysiol 2010; 121:366-75. [PMID: 20075003 DOI: 10.1016/j.clinph.2009.10.036] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Revised: 09/25/2009] [Accepted: 10/01/2009] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Several human studies have demonstrated that the amplitudes of cortical oscillations are altered by various sensorimotor and cognitive tasks. Event-related augmentation of gamma oscillations and attenuation of alpha and beta oscillations have been often used as surrogate markers of cortical activation elicited by tasks especially in presurgical identification of eloquent cortices. In the present study, we addressed a question whether somatosensory-related gamma augmentation 'precedes' or 'co-occurs with' somatosensory-related attenuation of alpha-beta oscillations. METHODS We studied 10 patients who underwent intracranial electrocorticography for epilepsy surgery, and determined the temporal and spatial characteristics of median-nerve somatosensory-related amplitude changes at gamma- (30-100Hz), beta- (14-28Hz) and alpha-band (8-12Hz) oscillations. RESULTS We found that somatosensory-related gamma augmentation involving the post- and pre-central gyri evolved into beta and alpha augmentation, which was subsequently followed by beta and alpha attenuation involving the post- and pre-central gyri. CONCLUSIONS These observations support the hypothesis that somatosensory-related gamma augmentation but not alpha-beta attenuation represents the initial cortical processing for external somatosensory stimuli. Somatosensory-related alpha-beta attenuation appears to represent a temporally distinct stage of somatosensory processing. SIGNIFICANCE The present study has increased our understanding of event-related gamma augmentation and alpha-beta attenuation seen on electrocorticography.
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Affiliation(s)
- Miho Fukuda
- Department of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit Medical Center, Detroit, MI 48201, USA
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36
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Minc D, Machado S, Bastos VH, Machado D, Cunha M, Cagy M, Budde H, Basile L, Piedade R, Ribeiro P. Gamma band oscillations under influence of bromazepam during a sensorimotor integration task: an EEG coherence study. Neurosci Lett 2009; 469:145-9. [PMID: 19945509 DOI: 10.1016/j.neulet.2009.11.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 11/14/2009] [Accepted: 11/21/2009] [Indexed: 11/15/2022]
Abstract
The goal of the present study was to explore the dynamics of the gamma band using the coherence of the quantitative electroencephalography (qEEG) in a sensorimotor integration task and the influence of the neuromodulator bromazepam on the band behavior. Our hypothesis is that the needs of the typewriting task will demand the coupling of different brain areas, and that the gamma band will promote the binding of information. It is also expected that the neuromodulator will modify this coupling. The sample was composed of 39 healthy subjects. We used a randomized double-blind design and divided subjects into three groups: placebo (n=13), bromazepam 3mg (n=13) and bromazepam 6 mg (n=13). The two-way ANOVA analysis demonstrated a main effect for the factors condition (i.e., C4-CZ electrode pair) and moment (i.e., C3-CZ, C3-C4 and C4-CZ pairs of electrodes). We propose that the gamma band plays an important role in the binding among several brain areas in complex motor tasks and that each hemisphere is influenced in a different manner by the neuromodulator.
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Affiliation(s)
- Daniel Minc
- Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, RJ, Brazil
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Jerbi K, Ossandón T, Hamamé CM, Senova S, Dalal SS, Jung J, Minotti L, Bertrand O, Berthoz A, Kahane P, Lachaux JP. Task-related gamma-band dynamics from an intracerebral perspective: review and implications for surface EEG and MEG. Hum Brain Mapp 2009; 30:1758-71. [PMID: 19343801 DOI: 10.1002/hbm.20750] [Citation(s) in RCA: 199] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Although non-invasive techniques provide functional activation maps at ever-growing spatio-temporal precision, invasive recordings offer a unique opportunity for direct investigations of the fine-scale properties of neural mechanisms in focal neuronal populations. In this review we provide an overview of the field of intracranial Electroencephalography (iEEG) and discuss its strengths and limitations and its relationship to non-invasive brain mapping techniques. We discuss the characteristics of invasive data acquired from implanted epilepsy patients using stereotactic-electroencephalography (SEEG) and electrocorticography (ECoG) and the use of spectral analysis to reveal task-related modulations in multiple frequency components. Increasing evidence suggests that gamma-band activity (>40 Hz) might be a particularly efficient index for functional mapping. Moreover, the detection of high gamma activity may play a crucial role in bridging the gap between electrophysiology and functional imaging studies as well as in linking animal and human data. The present review also describes recent advances in real-time invasive detection of oscillatory modulations (including gamma activity) in humans. Furthermore, the implications of intracerebral findings on future non-invasive studies are discussed.
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Affiliation(s)
- Karim Jerbi
- INSERM U821, Brain Dynamics and Cognition; Université Claude Bernard, Lyon 1, Lyon, France
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Cebolla AM, De Saedeleer C, Bengoetxea A, Leurs F, Balestra C, d'Alcantara P, Palmero-Soler E, Dan B, Cheron G. Movement gating of beta/gamma oscillations involved in the N30 somatosensory evoked potential. Hum Brain Mapp 2009; 30:1568-79. [PMID: 18661507 DOI: 10.1002/hbm.20624] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Evoked potential modulation allows the study of dynamic brain processing. The mechanism of movement gating of the frontal N30 component of somatosensory evoked potentials (SEP) produced by the stimulation of the median nerve at wrist remains to be elucidated. At rest, a power enhancement and a significant phase-locking of the electroencephalographic (EEG) oscillation in the beta/gamma range (25-35 Hz) are related to the emergence of the N30. The latter was also perfectly identified in presence of pure phase-locking situation. Here, we investigated the contribution of these rhythmic activities to the specific gating of the N30 component during movement. We demonstrated that concomitant execution of finger movement of the stimulated hand impinges such temporal concentration of the ongoing beta/gamma EEG oscillations and abolishes the N30 component throughout their large topographical extent on the scalp. This also proves that the phase-locking phenomenon is one of the main actors for the N30 generation. These findings could be explained by the involvement of neuronal populations of the sensorimotor cortex and other related areas, which are unable to respond to the phasic sensory activation and to phase-lock their firing discharges to the external sensory input during the movement. This new insight into the contribution of phase-locked oscillation in the emergence of the N30 and in its gating behavior calls for a reappraisal of fundamental and clinical interpretation of the frontal N30 component.
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Affiliation(s)
- Ana Maria Cebolla
- Laboratory of Neurophysiology and Movement Biomechanics, Université Libre de Bruxelles, 50 Avenue F. Roosevelt, Brussels, Belgium
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Dalal SS, Baillet S, Adam C, Ducorps A, Schwartz D, Jerbi K, Bertrand O, Garnero L, Martinerie J, Lachaux JP. Simultaneous MEG and intracranial EEG recordings during attentive reading. Neuroimage 2009; 45:1289-304. [DOI: 10.1016/j.neuroimage.2009.01.017] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Revised: 12/23/2008] [Accepted: 01/09/2009] [Indexed: 10/21/2022] Open
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Mainy N, Jung J, Baciu M, Kahane P, Schoendorff B, Minotti L, Hoffmann D, Bertrand O, Lachaux J. Cortical dynamics of word recognition. Hum Brain Mapp 2008; 29:1215-30. [PMID: 17712785 PMCID: PMC6871193 DOI: 10.1002/hbm.20457] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
While functional neuroimaging studies have helped elucidate major regions implicated in word recognition, much less is known about the dynamics of the associated activations or the actual neural processes of their functional network. We used intracerebral electroencephalography recordings in 10 patients with epilepsy to directly measure neural activity in the temporal and frontal lobes during written words' recognition, predominantly in the left hemisphere. The patients were presented visually with consonant strings, pseudo-words, and words and performed a hierarchical paradigm contrasting semantic processes (living vs. nonliving word categorization task), phonological processes (rhyme decision task on pseudo-words), and visual processes (visual analysis of consonant strings). Stimuli triggered a cascade of modulations in the gamma-band (>40 Hz) with reproducible timing and task-sensitivity throughout the functional reading network: the earliest gamma-band activations were observed for all stimuli in the mesial basal temporal lobe at 150 ms, reaching the word form area in the mid fusiform gyrus at 200 ms, evidencing a superiority effect for word-like stimuli. Peaks of gamma-band activations were then observed for word-like stimuli after 400 ms in the anterior and middle portion of the superior temporal gyrus (BA 38 and BA 22 respectively), in the pars triangularis of Broca's area for the semantic task (BAs 45 and 47), and in the pars opercularis for the phonological task (BA 44). Concurrently, we observed a two-pronged effect in the prefrontal cortex (BAs 9 and 46), with nonspecific sustained dorsal activation related to sustained attention and, more ventrally, a strong reflex deactivation around 500 ms, possibly due to semantic working memory reset.
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Affiliation(s)
- Nelly Mainy
- INSERM, U821, Lyon, F‐69500, France
- Institut Fédératif des Neurosciences, Lyon, F‐69000, France
- Université Lyon 1, Lyon, F‐69000, France
| | - Julien Jung
- INSERM, U821, Lyon, F‐69500, France
- Institut Fédératif des Neurosciences, Lyon, F‐69000, France
- Université Lyon 1, Lyon, F‐69000, France
| | - Monica Baciu
- CNRS, UMR 5105, Laboratoire de Psychologie et Neurocognition, Université Pierre Mendès‐France, Grenoble F‐38000, France
| | - Philippe Kahane
- Department of Neurology, Grenoble Hospital, Grenoble F‐38000, France
- INSERM, U318, Grenoble F‐38000, France
| | - Benjamin Schoendorff
- INSERM, U821, Lyon, F‐69500, France
- Institut Fédératif des Neurosciences, Lyon, F‐69000, France
- Université Lyon 1, Lyon, F‐69000, France
| | - Lorella Minotti
- Department of Neurology, Grenoble Hospital, Grenoble F‐38000, France
- INSERM, U318, Grenoble F‐38000, France
| | - Dominique Hoffmann
- INSERM, U318, Grenoble F‐38000, France
- Department of Neurosurgery, Grenoble Hospital, Grenoble F‐38000, France
| | - Olivier Bertrand
- INSERM, U821, Lyon, F‐69500, France
- Institut Fédératif des Neurosciences, Lyon, F‐69000, France
- Université Lyon 1, Lyon, F‐69000, France
| | - Jean‐Philippe Lachaux
- INSERM, U821, Lyon, F‐69500, France
- Institut Fédératif des Neurosciences, Lyon, F‐69000, France
- Université Lyon 1, Lyon, F‐69000, France
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High-frequency network oscillations in cerebellar cortex. Neuron 2008; 58:763-74. [PMID: 18549787 DOI: 10.1016/j.neuron.2008.03.030] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Revised: 10/16/2007] [Accepted: 03/26/2008] [Indexed: 11/23/2022]
Abstract
Both cerebellum and neocortex receive input from the somatosensory system. Interaction between these regions has been proposed to underpin the correct selection and execution of motor commands, but it is not clear how such interactions occur. In neocortex, inputs give rise to population rhythms, providing a spatiotemporal coding strategy for inputs and consequent outputs. Here, we show that similar patterns of rhythm generation occur in cerebellum during nicotinic receptor subtype activation. Both gamma oscillations (30-80 Hz) and very fast oscillations (VFOs, 80-160 Hz) were generated by intrinsic cerebellar cortical circuitry in the absence of functional glutamatergic connections. As in neocortex, gamma rhythms were dependent on GABA(A) receptor-mediated inhibition, whereas VFOs required only nonsynaptically connected intercellular networks. The ability of cerebellar cortex to generate population rhythms within the same frequency bands as neocortex suggests that they act as a common spatiotemporal code within which corticocerebellar dialog may occur.
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Ball T, Demandt E, Mutschler I, Neitzel E, Mehring C, Vogt K, Aertsen A, Schulze-Bonhage A. Movement related activity in the high gamma range of the human EEG. Neuroimage 2008; 41:302-10. [PMID: 18424182 DOI: 10.1016/j.neuroimage.2008.02.032] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Revised: 02/15/2008] [Accepted: 02/19/2008] [Indexed: 11/24/2022] Open
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Parieto-frontal gamma band activity during the perceptual emergence of speech forms. Neuroimage 2008; 42:404-13. [PMID: 18524627 DOI: 10.1016/j.neuroimage.2008.03.063] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2007] [Revised: 03/26/2008] [Accepted: 03/30/2008] [Indexed: 11/24/2022] Open
Abstract
The multistable perception of speech refers to the perceptual changes experienced while listening to a speech form cycled in rapid and continuous repetition, the so-called Verbal Transformation Effect. Because distinct interpretations of the same repeated stimulus alternate spontaneously, this effect provides an invaluable tool to examine how speech percepts are formed in the listener's mind. In order to track the temporal dynamics of brain activity specifically linked to perceptual changes, intracerebral EEG activity was recorded from two implanted epileptic patients while performing a verbal transformation task. To this aim, they were asked to carefully listen to a speech sequence played repeatedly and to press a button whenever they perceived a change in the repeated utterance. For both patients, 300-800 ms prior to the reported perceptual transitions, high frequency activity in the gamma band range (>40 Hz) was observed within the left inferior frontal and supramarginal gyri. An additional auditory decision task was used to rule out the possibility that the increased gamma band activity was due to the patients' motor responses. These results suggest that articulatory-based representations play a key part in the endogenously driven emergence of auditory speech percepts. The findings are interpreted in relation to theories assuming a link between perception and action in the human speech processing system.
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Lachaux JP, Fonlupt P, Kahane P, Minotti L, Hoffmann D, Bertrand O, Baciu M. Relationship between task-related gamma oscillations and BOLD signal: new insights from combined fMRI and intracranial EEG. Hum Brain Mapp 2008; 28:1368-75. [PMID: 17274021 PMCID: PMC6871347 DOI: 10.1002/hbm.20352] [Citation(s) in RCA: 239] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Cognitive neuroscience relies on two sets of techniques to map the neural networks underlying cognition in humans: recordings of either regional metabolic changes (fMRI or PET) or fluctuations in the neural electromagnetic fields (EEG and MEG). Despite major advances in the last few years, an explicit linkage between the two is still missing and the neuroimaging community faces two complementary but unrelated sets of functional descriptions of the human brain. Such an explicit framework, linking the two approaches in potentially complex cognitive tasks and in a variety of brain regions would permit to combine them into fine spatio-temporally-grained human brain mapping procedures. We combined fMRI and intra-cranial EEG recordings of the same epileptic patients during a semantic decision task and found a close spatial correspondence between regions of fMRI activations and recording sites showing EEG energy modulations in the gamma range (>40 Hz). Our findings further support previous findings that gamma band modulations co-localize with BOLD variations and also indicate that fMRI may be used as a constraint to improve source reconstruction of gamma band EEG responses.
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Lachaux JP, Jerbi K, Bertrand O, Minotti L, Hoffmann D, Schoendorff B, Kahane P. A blueprint for real-time functional mapping via human intracranial recordings. PLoS One 2007; 2:e1094. [PMID: 17971857 PMCID: PMC2040217 DOI: 10.1371/journal.pone.0001094] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2007] [Accepted: 10/10/2007] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The surgical treatment of patients with intractable epilepsy is preceded by a pre-surgical evaluation period during which intracranial EEG recordings are performed to identify the epileptogenic network and provide a functional map of eloquent cerebral areas that need to be spared to minimize the risk of post-operative deficits. A growing body of research based on such invasive recordings indicates that cortical oscillations at various frequencies, especially in the gamma range (40 to 150 Hz), can provide efficient markers of task-related neural network activity. PRINCIPAL FINDINGS Here we introduce a novel real-time investigation framework for mapping human brain functions based on online visualization of the spectral power of the ongoing intracranial activity. The results obtained with the first two implanted epilepsy patients who used the proposed online system illustrate its feasibility and utility both for clinical applications, as a complementary tool to electrical stimulation for presurgical mapping purposes, and for basic research, as an exploratory tool used to detect correlations between behavior and oscillatory power modulations. Furthermore, our findings suggest a putative role for high gamma oscillations in higher-order auditory processing involved in speech and music perception. CONCLUSION/SIGNIFICANCE The proposed real-time setup is a promising tool for presurgical mapping, the investigation of functional brain dynamics, and possibly for neurofeedback training and brain computer interfaces.
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Gross J, Schnitzler A, Timmermann L, Ploner M. Gamma oscillations in human primary somatosensory cortex reflect pain perception. PLoS Biol 2007; 5:e133. [PMID: 17456008 PMCID: PMC1854914 DOI: 10.1371/journal.pbio.0050133] [Citation(s) in RCA: 257] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2006] [Accepted: 03/12/2007] [Indexed: 11/22/2022] Open
Abstract
Successful behavior requires selection and preferred processing of relevant sensory information. The cortical representation of relevant sensory information has been related to neuronal oscillations in the gamma frequency band. Pain is of invariably high behavioral relevance and, thus, nociceptive stimuli receive preferred processing. Here, by using magnetoencephalography, we show that selective nociceptive stimuli induce gamma oscillations between 60 and 95 Hz in primary somatosensory cortex. Amplitudes of pain-induced gamma oscillations vary with objective stimulus intensity and subjective pain intensity. However, around pain threshold, perceived stimuli yielded stronger gamma oscillations than unperceived stimuli of equal stimulus intensity. These results show that pain induces gamma oscillations in primary somatosensory cortex that are particularly related to the subjective perception of pain. Our findings support the hypothesis that gamma oscillations are related to the internal representation of behaviorally relevant stimuli that should receive preferred processing. Pain is a highly subjective sensation of inherent behavioral importance and is therefore expected to receive enhanced processing in relevant brain regions. We show that painful stimuli induce high-frequency oscillations in the electrical activity of the human primary somatosensory cortex. Amplitudes of these pain-induced gamma oscillations were more closely related to the subjective perception of pain than to the objective stimulus attributes. They correlated with participants' ratings of pain and were stronger for laser stimuli that caused pain, compared with the same stimuli when no pain was perceived. These findings indicate that gamma oscillations may represent an important mechanism for processing behaviorally relevant sensory information. Magnetoencephalography reveals that gamma oscillations in the somatosensory cortex correlate with the subjective rating of pain and are stronger for laser stimuli that cause pain, compared with the same stimuli when no pain is perceived.
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Affiliation(s)
- Joachim Gross
- Department of Neurology, Heinrich-Heine-University, Düsseldorf, Germany
- Centre for Cognitive Neuroimaging, Department of Psychology, University of Glasgow, United Kingdom
| | - Alfons Schnitzler
- Department of Neurology, Heinrich-Heine-University, Düsseldorf, Germany
- Wolfson Centre for Clinical and Cognitive Neuroscience, School of Psychology, University of Wales, Bangor, United Kingdom
- * To whom correspondence should be addressed. E-mail:
| | - Lars Timmermann
- Department of Neurology, Heinrich-Heine-University, Düsseldorf, Germany
| | - Markus Ploner
- Department of Neurology, Heinrich-Heine-University, Düsseldorf, Germany
- Department of Neurology, Technical University Munich, Munich, Germany
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Bocková M, Chládek J, Jurák P, Halámek J, Rektor I. Executive functions processed in the frontal and lateral temporal cortices: intracerebral study. Clin Neurophysiol 2007; 118:2625-36. [PMID: 17911041 DOI: 10.1016/j.clinph.2007.07.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Revised: 06/14/2007] [Accepted: 07/28/2007] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The study was designed to investigate the neurocognitive network in the frontal and lateral temporal cortices that is activated by the complex cognitive visuomotor tasks of letter writing. METHODS Eight epilepsy surgery candidates with implanted intracerebral depth electrodes performed two tasks involving the writing of single letters. The first task consisted of copying letters. In the second task, the patients were requested to write any other letter. The cognitive load of the second task was increased mainly by larger involvement of the executive functions. The task-related ERD/ERS of the alpha, beta and gamma rhythms was studied. RESULTS The alpha and beta ERD as the activational correlate of writing of single letters was found in the sensorimotor cortex, anterior cingulate, premotor, parietal cortices, SMA and the temporal pole. The alpha and beta ERD linked to the increased cognitive load was present moreover in the dorsolateral and ventrolateral prefrontal cortex, orbitofrontal cortex and surprisingly also the temporal neocortex. Gamma ERS was detected mostly in the left motor cortex. CONCLUSIONS Particularly the temporal neocortex was activated by the increased cognitive load. SIGNIFICANCE The lateral temporal cortex together with frontal areas forms a cognitive network processing executive functions.
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Affiliation(s)
- M Bocková
- First Department of Neurology, Masaryk University, St Anne's Hospital, 656 91, Brno, Czech Republic.
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Cheron G, Cebolla AM, De Saedeleer C, Bengoetxea A, Leurs F, Leroy A, Dan B. Pure phase-locking of beta/gamma oscillation contributes to the N30 frontal component of somatosensory evoked potentials. BMC Neurosci 2007; 8:75. [PMID: 17877800 PMCID: PMC2075516 DOI: 10.1186/1471-2202-8-75] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2006] [Accepted: 09/18/2007] [Indexed: 11/10/2022] Open
Abstract
Background Evoked potentials have been proposed to result from phase-locking of electroencephalographic (EEG) activities within specific frequency bands. However, the respective contribution of phasic activity and phase resetting of ongoing EEG oscillation remains largely debated. We here applied the EEGlab procedure in order to quantify the contribution of electroencephalographic oscillation in the generation of the frontal N30 component of the somatosensory evoked potentials (SEP) triggered by median nerve electrical stimulation at the wrist. Power spectrum and intertrial coherence analysis were performed on EEG recordings in relation to median nerve stimulation. Results The frontal N30 component was accompanied by a significant phase-locking of beta/gamma oscillation (25–35 Hz) and to a lesser extent of 80 Hz oscillation. After the selection in each subject of the trials for which the power spectrum amplitude remained unchanged, we found pure phase-locking of beta/gamma oscillation (25–35 Hz) peaking about 30 ms after the stimulation. Transition across trials from uniform to normal phase distribution revealed temporal phase reorganization of ongoing 30 Hz EEG oscillations in relation to stimulation. In a proportion of trials, this phase-locking was accompanied by a spectral power increase peaking in the 30 Hz frequency band. This corresponds to the complex situation of 'phase-locking with enhancement' in which the distinction between the contribution of phasic neural event versus EEG phase resetting is hazardous. Conclusion The identification of a pure phase-locking in a large proportion of the SEP trials reinforces the contribution of the oscillatory model for the physiological correlates of the frontal N30. This may imply that ongoing EEG rhythms, such as beta/gamma oscillation, are involved in somatosensory information processing.
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Affiliation(s)
- Guy Cheron
- Laboratory of Neurophysiology and Movement Biomechanics, Université Libre de Bruxelles (ULB), CP 168, 50 Av F Roosevelt, Brussels, Belgium
- Laboratory of Electrophysiology, Université de Mons-Hainaut, Belgium
| | - Ana Maria Cebolla
- Laboratory of Neurophysiology and Movement Biomechanics, Université Libre de Bruxelles (ULB), CP 168, 50 Av F Roosevelt, Brussels, Belgium
| | - Caty De Saedeleer
- Laboratory of Neurophysiology and Movement Biomechanics, Université Libre de Bruxelles (ULB), CP 168, 50 Av F Roosevelt, Brussels, Belgium
| | - Ana Bengoetxea
- Laboratory of Neurophysiology and Movement Biomechanics, Université Libre de Bruxelles (ULB), CP 168, 50 Av F Roosevelt, Brussels, Belgium
| | - Françoise Leurs
- Laboratory of Neurophysiology and Movement Biomechanics, Université Libre de Bruxelles (ULB), CP 168, 50 Av F Roosevelt, Brussels, Belgium
| | - Axelle Leroy
- Laboratory of Neurophysiology and Movement Biomechanics, Université Libre de Bruxelles (ULB), CP 168, 50 Av F Roosevelt, Brussels, Belgium
| | - Bernard Dan
- Department of Neurology, Hopital Universitaire des Enfants Reine Fabiola, Université Libre de Bruxelles (ULB), Belgium
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Miller KJ, denNijs M, Shenoy P, Miller JW, Rao RPN, Ojemann JG. Real-time functional brain mapping using electrocorticography. Neuroimage 2007; 37:504-7. [PMID: 17604183 DOI: 10.1016/j.neuroimage.2007.05.029] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2006] [Revised: 05/02/2007] [Accepted: 05/07/2007] [Indexed: 11/25/2022] Open
Abstract
We demonstrate the feasibility of real-time cortical mapping from arrays of subdural electrodes using the electrocorticographic signal power in the higher spectral frequencies (76-200 Hz, or "chi-index"). Hand area was mapped offline in eight individuals using brief baseline and hand-movement measurements. In one patient, hand sensorimotor cortex was identified online during a handshake. We propose that this high-frequency component of the electrocorticogram provides a generic, reliable, clinically useful correlate of local cortical function.
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Affiliation(s)
- Kai J Miller
- University of Washington, Department of Physics, Box 351560, Seattle, WA 98195-1560, USA.
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Devos D, Szurhaj W, Reyns N, Labyt E, Houdayer E, Bourriez JL, Cassim F, Krystkowiak P, Blond S, Destée A, Derambure P, Defebvre L. Predominance of the contralateral movement-related activity in the subthalamo-cortical loop. Clin Neurophysiol 2006; 117:2315-27. [PMID: 16926112 DOI: 10.1016/j.clinph.2006.06.719] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2006] [Revised: 06/06/2006] [Accepted: 06/28/2006] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Abnormal low- and high-frequency oscillatory activities have been linked to abnormal movement control in Parkinson's disease. We aimed to study how low- and high-frequency oscillatory activities are modulated by movement in the contralateral and ipsilateral subcorticocortical loops. METHODS We studied mu, beta and gamma rhythm event-related desynchronisation (ERD) and synchronisation (ERS) recorded from electrode contacts in the subthalamic nucleus (STN) areas and over the primary sensorimotor (PSM) cortex. RESULTS Mu and beta ERD/ERS patterns were very similar when comparing PSM cortex and STN areas and very different when comparing contralateral and ipsilateral structures. Beta rhythm ERS was more predominant over contralateral structures than over ipsilateral ones. Gamma rhythm ERS was only recorded from the contralateral STN area (particularly following administration of L-Dopa). For all patients, the best bipolar derivations - as defined by the earliest mu and beta ERD and the strongest beta and gamma ERS - always included the STN electrode contacts that produced the best clinical results. CONCLUSIONS Movement-related activity is involved in the movement preparation in the contralateral subthalamo-cortical loop and in the movement execution in the bilateral subthalamo-cortical loops. SIGNIFICANCE Contralateral beta rhythm ERD seemed to be related to bradykinesia of the limb performing the movement.
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Affiliation(s)
- D Devos
- Department of Neurology, EA2683, IFR114, Lille University Medical Centre, Hôpital R. Salengro, Clinique Neurologique, CHRU, F-59037 Lille Cedex, France.
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