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Methylphenidate decreases the EEG mu power in the right primary motor cortex in healthy adults during motor imagery and execution. Brain Struct Funct 2021; 226:1185-1193. [PMID: 33598759 DOI: 10.1007/s00429-021-02233-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 01/28/2021] [Indexed: 10/22/2022]
Abstract
This study investigated the effects of dopaminergic drugs on the EEG mu power during motor imagery, action observation, and execution. This is a double-blind, crossover study with a sample of 15 healthy adults under placebo vs. methylphenidate vs. risperidone conditions during motor imagery, action observation, and execution tasks. The participants had drug dosage adjustment based on body weight/dose (mg/kg). We also analyzed the mu band power by electroencephalography during the study steps. The main result is the interaction between the condition and task factors for the C3 and C4 electrodes, with decreasing EEG mu power in the methylphenidate when compared to risperidone (p ≤ 0.0083). Our results can indicate that the methylphenidate decreases the neurophysiological activity in the central cortical regions during the perceptual experience of tasks with or without body movement.
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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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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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Velasques B, Machado S, Portella CE, Silva JG, Terra P, Ferreira C, Basile L, Cagy M, Piedade R, Ribeiro P. Cortical asymmetry: catching an object in free fall. ARQUIVOS DE NEURO-PSIQUIATRIA 2007; 65:623-7. [PMID: 17876403 DOI: 10.1590/s0004-282x2007000400015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2007] [Accepted: 04/04/2007] [Indexed: 11/22/2022]
Abstract
The main goal of the present study was to analyze theta asymmetry through quantitative electroencephalography (qEEG) when individuals were exposed to a sequential motor task, i.e. catching a ball. The sample was composed of 23 healthy subjects, male and female, between 25 and 40 years of age. A two-way factor Anova was applied to compare pre and post moments related to the balls' drop and scalp regions (i.e., frontal and parieto-occipital cortices). The first analysis of the frontal region compared electrodes in the left, right and left/right hemispheres combined, with the frontal midline electrode (FZ) included in the analysis. The results showed moment and region main effects. The second analysis compared left versus right hemisphere without the FZ site. The findings demonstrated an interaction effect between moment and region. The first parieto-occipital analysis, comparing left, right and central regions, with PZ included in all regions, showed main effects of moment and region. The second analysis, comparing left, right (without Pz) and central regions strictly demonstrated a region main effect. Thus, we observed an asymmetric pattern in the frontal cortex (i.e., planning and response selection) when the subjects were waiting for the balls' drop. Moreover, the left hemisphere seems to engage differently from the other regions when the central nervous system needs to prepare for a motor action. On the other hand, the parieto-occipital cortex, which is related to attentive processes, demonstrated a more asymmetric activity towards the right region which implies a participation of this area in cognitive strategies in this particular task. Taken together, we concluded that the adopted experimental approach can be useful to explore several others directions combining sensorimotor integration tasks with different pathologies, such as depression, Alzheimer's and Parkinson's diseases.
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Affiliation(s)
- Bruna Velasques
- Laboratório de Mapeamento Cerebral e Integração Sensório-Motor, Instituto de Psiquiatria, Universidade Federal do Rio de Janeiro, 20541-190 Rio de Janeiro, RJ, Brazil.
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Silva JG, Knackfuss IG, Portella CE, Machado S, Velasques B, Bastos VHDV, Queiroz RDA, Neves MAO, Pacheco M, Vorkapic CF, Cagy M, Piedade R, Ribeiro P. Changes in cortical relative power in patients submitted to a tendon transfer: a pre and post surgery study. ARQUIVOS DE NEURO-PSIQUIATRIA 2007; 65:628-32. [PMID: 17876404 DOI: 10.1590/s0004-282x2007000400016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2007] [Accepted: 03/21/2007] [Indexed: 11/21/2022]
Abstract
The aim of this study is analyze possible modifications in the cerebral cortex, through quantitative electroencephalography (qEEG) in patients submitted to a tendon transfer procedure (posterior tibialis) by the Srinivasan's technique. Four subjects (2 men and 2 women), 49.25 age average (SD +/ 21.4) were studied. All subjects have been through surgical procedure due to leprosy and had, at least, two years of drop foot condition. The qEEG measured the electrocortical activity (relative power) between 8 and 25 Hz frequencies pre and post surgery. A paired t test analyzed all data (p< or =0,05). The results show significant alterations in the alpha relative power, electrodes F7 (p=0.01) and F8 (p=0.021). Altogether, based on findings of the current literature, we can conclude that the tendon transfer procedure suggests electrocortical alterations sensitive to specific qEEG bands.
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Affiliation(s)
- Julio Guilherme Silva
- Laboratory of Brain Mapping and Sensory-Motor Integration, Institute of Psychiatry, Federal University of Rio de Janeiro, Rua Filgueiras Lima 68, 20950-050 Rio de Janeiro, RJ, Brazil.
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Silva JG, Knackfuss IG, Portella CE, Bastos VHDV, Machado DDCD, Basile L, Piedade R, Ribeiro P. [EEG spectral coherence at patients submitted to tendon transfer surgery: study pre- and post-surgery]. ARQUIVOS DE NEURO-PSIQUIATRIA 2007; 64:473-7. [PMID: 16917622 DOI: 10.1590/s0004-282x2006000300023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2005] [Accepted: 02/06/2006] [Indexed: 11/22/2022]
Abstract
Tendon transfer of the tibiliais posterior muscle is a surgical intervention widely employed in orthopedics for the correction of drop foot caused by leprosy. However, few models have proposed a thorough investigation of the brain plasticity phenomenon during tendon transfer. Thus, the present study aimed at analyzing EEG spectral coherence (SC) in patients submitted to tendon transfer of the tibiliais posterior muscle by Srinivasan's technique and quantitative EEG (EEGq). The sample consisted of four subjects with drop foot caused by leprosy. The SC parameter was evaluated in two experimental moments: pre and post-surgery. Results demonstrated a main moment effect for the C3-CZ electrode pair. Specifically, a significant increase in coherence values was observed. However, the ANOVA did not indicate a significant band/moment interaction. It can be assumed that coherence augmentation indicates that functional rehabilitation promoted by this specific surgery yields cortical alterations.
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Affiliation(s)
- Julio Guilherme Silva
- Laboratório de Mapeamento Cerebral e Integração Sensório-motor, IPUB, Universidade Federal do Rio de Janeiro, Rua Filgueiras Lima 68/104, 20950-050 Rio de Janeiro RJ, Brazil.
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Portella CE, Silva JG, Machado S, Velasques B, Bastos VHDV, Ferreira-Vorkapic C, Terra P, Lopes V, Cagy M, Carvalho ED, Orsini M, Basile L, Piedade R, Ribeiro P. EEG spectral cohrence inter and intrahemispheric during catching object fall task. ARQUIVOS DE NEURO-PSIQUIATRIA 2007; 65:63-7. [PMID: 17420829 DOI: 10.1590/s0004-282x2007000100014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2006] [Accepted: 10/13/2006] [Indexed: 11/21/2022]
Abstract
The aim of the present study was to evaluate coherence measures at Theta through qEEG during the accomplishment of a specific motor task. The sample consisted of 23 healthy individuals, both sexes, with ages varying between 25 and 40 years old. All subjects were submmitted to a specific motor task of cacthing sequences of falling balls. A three-way ANOVA was employed for the statistical analysis, which demonstrated main effects for the following factors: time, block and position. However, there was no interection between the factors. A significant and generalized coherence reduction was observed during the task execution time. Coherence was also diminished at the left frontal cortex and contralateral hemisphere of the utilizing limb (comparing to the right frontal cortex). In conclusion, these findings suggest a certain specialization of the neural circuit, also according to previous investigations. The inter-coherence reduction suggests a spatial inter-electrode dependence during the task, rather than a neuronal specialization.
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Affiliation(s)
- Cláudio Elidio Portella
- Laboratório de Mapeamento Cerebral e Integração Sensório-motor, Instituto de Psiquiatria, Universidade Federal do Rio de Janeiro, Rua Silva Teles 30A/208, 20541-110 Rio de Janeiro, RJ, Brazil.
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Portella CE, Silva JG, Bastos VH, Machado D, Cunha M, Cagy M, Basile L, Piedade R, Ribeiro P. Aprendizagem de procedimentos e efeitos ansiolíticos: medidas eletrencefalográficas, motora e atencional. ARQUIVOS DE NEURO-PSIQUIATRIA 2006; 64:478-84. [PMID: 16917623 DOI: 10.1590/s0004-282x2006000300024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2005] [Accepted: 02/21/2006] [Indexed: 11/22/2022]
Abstract
O objetivo do presente estudo foi avaliar parâmetros atencionais, motores e eletrencefalográficos durante uma tarefa de procedimentos em sujeitos que ingeriram 6mg de bromazepam. A amostra consistiu de 26 sujeitos saudáveis, ambos os sexos, entre 19 e 36 anos. Os grupos controle e experimental foram submetidos à tarefa datilográfica em desenho duplo-cego randomizado. Os achados não revelaram diferenças nas medidas atencionais e motoras entre os grupos. Foram avaliadas medidas de coerência (EEGq) entre regiões do escalpo nas bandas teta, alfa e beta. Análise inicial revelou um efeito principal para condição (Anova 2- critérios de variação - condição versus blocos). Uma segunda Anova, também com 2 critérios de variação (condição versus região do escalpo), demonstrou um efeito principal para ambos os fatores. Em conclusão, a medida de coerência parece não ser uma ferramenta sensível para demonstrar diferenças entre áreas corticais em função de uma tarefa de procedimentos.
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Affiliation(s)
- Claudio Elidio Portella
- Laboratório de Mapeamento Cerebral e Integração Sensório-motor, IPUB, Universidade Federal do Rio de Janeiro, Rua Filgueiras Lima 68/104, 20950-050 Rio de Janeiro RJ, Brazil
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