1
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Dirik HB, Ertan H. Hemispheric synchronization patterns linked with shooting performance in archers. Behav Brain Res 2024; 460:114813. [PMID: 38110123 DOI: 10.1016/j.bbr.2023.114813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/10/2023] [Accepted: 12/13/2023] [Indexed: 12/20/2023]
Abstract
Sustainable attention, effective visual-spatial perception, and motor control skills are considered highly important for achieving superior athletic performance. The aim of the current study was to investigate hemispheric synchronization patterns of brain electrical activation related to successful and unsuccessful shots of archers using electroencephalography (EEG). This study involved 16 elite archers, each shooting 36 arrows. The 10 shots closest to the target's center were successful, while the 10 farthest shots were unsuccessful. The transformed EEG data, obtained through surface Laplacian filtering, were divided into 5 sub-bands (theta, alpha1, alpha2, beta1, beta2) by calculating the alpha peak frequencies. The synchronization values of the electrode pairs were calculated using the Phase Locking Value (PLV) method. To compare the EEG data for successful and unsuccessful shots in all frequency bands, the linear mixed models were fitted. Perceived fatigue levels were quantified using a visual analog scale (VAS). Spearman's correlation analysis was conducted to examine the relationship between fatigue and shooting performance. The results showed significantly higher coupling strength for C3-O1, C4-O2, O1-O2, F3-F4, C4-T8, T7-O2, F4-C4, C3-O2 and F4-T8 pairs during successful shooting. Moreover, the coupling strengths for F3-O2, F4-T7, C3-C4, C3-T8, T7-T8, C4-O1, F3-T8, and F4-O2 were significantly higher in unsuccessful shooting. The current findings revealed differences in the synchronization patterns associated with shooting performance. It is observed that visual-motor performance is correlated with an increase in cortical synchronization values during successful shots. These findings have the potential to serve as a theoretical reference that contributes to superior performance.
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Affiliation(s)
- Hasan Batuhan Dirik
- Eskisehir Technical University, Department of Movement and Training Sciences, Faculty of Sport Sciences, Eskisehir, TURKEY.
| | - Hayri Ertan
- Eskisehir Technical University, Department of Movement and Training Sciences, Faculty of Sport Sciences, Eskisehir, TURKEY
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2
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Shi Q, Gong A, Ding P, Wang F, Fu Y. Neural Mechanisms of Visual-Spatial Judgment Behavior under Visual and Auditory Constraints: Evidence from an Electroencephalograph during Handgun Shooting. Brain Sci 2023; 13:1702. [PMID: 38137150 PMCID: PMC10741402 DOI: 10.3390/brainsci13121702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 12/01/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Light and noise are important factors affecting shooting performance, and shooters can exhibit physiological processes that differ from normal shooting when they are subjected to disturbed visual and auditory conditions. The purpose of this study was to explore the neural mechanism of shooting preparation in skilled shooters with visual and auditory limitations. We designed an experiment and recorded the electroencephalograph (EEG) and shooting performance indexes of 40 individuals skilled in marksmanship during the shooting preparation stage under three conditions: low light, noise interference, and a normal environment. EEG relative band power features and event-related desynchronization/synchronization (ERD/ERS) features were extracted and analyzed. The results showed that (1) the average score of the shooters was 8.55 under normal conditions, 7.71 under visually restricted conditions, and 8.50 under auditorily restricted conditions; (2) the relative EEG band power in the frontal lobe (Fp1, Fp2), frontal lobe (F4, F8), left temporal region (T7), central lobe (CP2), and parietal lobe (P3, PO3) in the theta band was significantly lower than in the other two environments (p < 0.05), and there was no significant difference between the power intensity of the shooter in the noisy environment and that in the normal environment; and (3) in the low-light environment, a significant negative correlation was found between the central region, the left and right temporal regions, and the parietal lobe (p < 0.05). These findings provide a basis for further understanding neural mechanisms in the brain during the shooting preparation phase under visually and auditorily restricted conditions.
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Affiliation(s)
- Qidi Shi
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China; (Q.S.); (P.D.); (F.W.)
- Brain Cognition and Brain-Computer Intelligence Integration Group, Kunming University of Science and Technology, Kunming 650500, China
| | - Anmin Gong
- School of Information Engineering, Chinese People’s Armed Police Force Engineering University, Xi’an 710086, China
- School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Peng Ding
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China; (Q.S.); (P.D.); (F.W.)
- Brain Cognition and Brain-Computer Intelligence Integration Group, Kunming University of Science and Technology, Kunming 650500, China
| | - Fan Wang
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China; (Q.S.); (P.D.); (F.W.)
- Brain Cognition and Brain-Computer Intelligence Integration Group, Kunming University of Science and Technology, Kunming 650500, China
| | - Yunfa Fu
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China; (Q.S.); (P.D.); (F.W.)
- Brain Cognition and Brain-Computer Intelligence Integration Group, Kunming University of Science and Technology, Kunming 650500, China
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3
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Cheng MY, Wang KP, Doppelmayr M, Steinberg F, Hung TM, Lu C, Tan YY, Hatfield B. QEEG markers of superior shooting performance in skilled marksmen: An investigation of cortical activity on psychomotor efficiency hypothesis. PSYCHOLOGY OF SPORT AND EXERCISE 2023; 65:102320. [PMID: 37665825 DOI: 10.1016/j.psychsport.2022.102320] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 10/10/2022] [Accepted: 10/12/2022] [Indexed: 09/06/2023]
Abstract
For elite performers, psychomotor behavior's success or failure can be traced to differences in brain dynamics. The psychomotor efficiency hypothesis suggests refined cortical activity through 1) selective activation of task-relevant processes and 2) inhibition of non-essential processes. The use of electroencephalography (EEG) has been applied to investigate psychomotor performance's neural processes. The EEG markers that reflect an elevation of psychomotor efficiency include left temporal alpha (T3 alpha), frontal midline theta (Fm theta), sensorimotor rhythm (SMR), and the coherence between frontal and left temporal regions. However, the relationship between elite performers' task-relevant and non-essential neural processes is still not well understood. Therefore, this study aimed to explore how each task-relevant and inhibition of non-essential processes contribute to superior psychomotor behavior. Thirty-five highly skilled marksmen were recruited to perform 30 shots in the shooting task while the EEG was recorded. The marksmen were divided into two groups (superior & inferior) based on a median split of shooting performance. The superior group exhibited higher accuracy and precision, with a reduction in movement jerk. EEG measures revealed that the superior group exhibited higher SMR before the trigger pull than the inferior group. In addition, the superior group demonstrated reduced Fz-T3 coherence in their bull's eye shots than the missed shots. These results suggest that the superior group exhibited less effortful engagement of task-relevant processes and lower interference from non-essential cortical regions than the inferior group. The study's overall findings support the psychomotor efficiency hypothesis. When comparing highly skilled performers, the slight differences in brain dynamics ultimately contribute to the success or failure of psychomotor performance.
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Affiliation(s)
- Ming-Yang Cheng
- School of Psychology, Beijing Sport University, No. 48 Xinxi Road, Haidian District, Beijing, 100084, China
| | - Kuo-Pin Wang
- Center for Cognitive Interaction Technology (CITEC), Bielefeld University, Inspiration 1, 33619, Bielefeld, Germany; Neurocognition and Action - Biomechanics Research Group, Faculty of Psychology and Sports Science, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Michael Doppelmayr
- Institute of Sports Science, Johannes Gutenberg University Mainz, Albert Schweitzerstr. 22, 55128, Mainz, Germany
| | - Fabian Steinberg
- School of Kinesiology, Louisiana State University, 112 Long Field house, Baton Rouge, LA, 70803, USA; Institute of Sports Science, Johannes Gutenberg University Mainz, Albert Schweitzerstr. 22, 55128, Mainz, Germany
| | - Tsung-Min Hung
- Department of Physical Education & Sport Sciences, National Taiwan Normal University, No.162, Sec. 1, Heping E. Rd., Da an Dist., Taipei, 106, Taiwan; Institute for Research Excellence in Learning Science, National Taiwan Normal University, No.162, Sec. 1, Heping E. Rd., Da an Dist., Taipei, 106, Taiwan
| | - Calvin Lu
- Department of Kinesiology, University of Maryland at College Park 4200 Valley Dr, College Park, MD, 20742, USA; University of Maryland. Department of Veterans Affairs, War Related Illness and Injury Study Center (WRIISC), Washington, DC, 20422, USA
| | - Ying Ying Tan
- Department of Kinesiology, University of Maryland at College Park 4200 Valley Dr, College Park, MD, 20742, USA; Neuroscience and Cognitive Sciences Program, University of Maryland at College Park 4090 Union Drive, College Park, MD, 20742, USA.
| | - Bradley Hatfield
- Department of Kinesiology, University of Maryland at College Park 4200 Valley Dr, College Park, MD, 20742, USA; Neuroscience and Cognitive Sciences Program, University of Maryland at College Park 4090 Union Drive, College Park, MD, 20742, USA
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4
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Kuo BC, Yeh LC, Chen FW, Chang CS, Hsieh CW, Yeh YY. Temporal profiles of cortical oscillations in novice performers for goal-directed aiming in a shooting task. Biol Psychol 2023; 176:108482. [PMID: 36574879 DOI: 10.1016/j.biopsycho.2022.108482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 12/19/2022] [Accepted: 12/23/2022] [Indexed: 12/25/2022]
Abstract
Goal-directed aiming relies on the ability to control attention and visuomotor movements while preparing for motor execution. Research in precision sports has investigated cortical oscillations for supporting expert performance. However, the results may be influenced by adaptive and strategic behaviors after intensive training. Whether and at what time points distinctive oscillations support goal-directed aiming without such training remains elusive. In this electroencephalographic (EEG) study, we investigated how the theta, alpha and beta oscillations change to support accurate aiming before novices took an action. We first conducted a model-based analysis to examine the correlation of cortical oscillations with accurate shooting on a trial-by-trial basis in a within-individual manner. The results showed that alpha and beta oscillations at different time points during the aiming period were better predictors of aiming accuracy. We then compared the oscillatory power for good versus poor performance. The results showed decreases in the alpha and beta power across distributed cortical areas and an increase in the frontal theta power successively before shot release. Moreover, greater intertrial phase coherence was observed for good performance than for poor performance in posterior alpha activity and anterior beta activity during the aiming period. In conclusion, these results advance our understanding of the temporal dynamics of theta, alpha and beta oscillations in orchestrating goal setting, motor preparation and focused attention to monitoring both external and internal states for accurate aiming. Among the three, alpha and beta oscillations are critical for predicting aiming performance and theta oscillations reflect effortful cognitive control.
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Affiliation(s)
- Bo-Cheng Kuo
- Department of Psychology, National Taiwan University, Taipei, Taiwan.
| | - Lu-Chun Yeh
- Department of Psychology, National Taiwan University, Taipei, Taiwan
| | - Fang-Wen Chen
- Department of Psychology, National Taiwan University, Taipei, Taiwan
| | - Chao-Shiung Chang
- Department of Psychology, National Taiwan University, Taipei, Taiwan
| | - Chang-Wei Hsieh
- Department of Computer Science and Information Engineering, Asia University, Taichung, Taiwan
| | - Yei-Yu Yeh
- Department of Psychology, National Taiwan University, Taipei, Taiwan
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5
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Gu F, Gong A, Qu Y, Lu L, Shi Q, Fu Y. Brain Network Research of Skilled Shooters in the Shooting Preparation Stage under the Condition of Limited Sensory Function. Brain Sci 2022; 12:brainsci12101373. [PMID: 36291306 PMCID: PMC9599685 DOI: 10.3390/brainsci12101373] [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: 09/07/2022] [Revised: 10/01/2022] [Accepted: 10/07/2022] [Indexed: 11/16/2022] Open
Abstract
Shooting is a sport dominated by psychological factors. Hence, disturbing the shooter's sensory function during aiming will seriously affect his psychological state and shooting performance. Electroencephalograph (EEG) measurements of 30 skilled marksmen in the shooting preparation stage under noisy disturbance, weak light, and normal conditions were recorded. Therefore, the differences in neural mechanisms in the shooter's brain during shooting aiming in different disturbance conditions were explored using an analytical approach that employs functional connectivity and brain network analysis based on graph theory. The relationship between these brain network characteristics and shooting performance was also compared. The results showed that (1) the average connection strength in the beta frequency band and connection intensity in the left and right temporal lobes of the shooters under noise disturbance were significantly higher than those under the other two conditions, and their brain networks also showed a higher global and local efficiency. In addition, (2) the functional connection intensity in the occipital region of the beta band was higher than that in the normal condition in the weak-light condition. The information interaction in the left parietal region also increased continually during the shooting process. (3) Furthermore, the shooters' eigenvector centrality in the temporal and occipital regions with limited sensory function in the two conditions was lower than those in the normal condition. These findings suggest that noise disturbance activates the arousal level of the shooter's brain and enhances the information processing efficiency of the brain network; however, it increases the mental workload. In weak-light conditions, shooters focus more on visual information processing during aiming and strengthen the inhibition of functions in the brain regions unrelated to shooting behavior. Audiovisual disturbance renders the cortical regions equivalent to the audiovisual perception function in the shooter's brain less important in the entire brain network than in the normal condition. Therefore, these findings reveal the effect of audiovisual disturbance on the functional network of the cortex in the shooting preparation stage and provide a theoretical basis for further understanding the neural mechanism of the shooting process under sensory disturbances.
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Affiliation(s)
- Feng Gu
- School of Information Engineering, Engineering University of People’s Armed Police, Xi’an 710086, China
| | - Anmin Gong
- School of Information Engineering, Engineering University of People’s Armed Police, Xi’an 710086, China
| | - Yi Qu
- School of Information Engineering, Engineering University of People’s Armed Police, Xi’an 710086, China
| | - Ling Lu
- School of Information Engineering, Engineering University of People’s Armed Police, Xi’an 710086, China
| | - Qidi Shi
- School of Automation and Information Engineering, Kunming University of Science and Technology, Kunming 650032, China
| | - Yunfa Fu
- School of Automation and Information Engineering, Kunming University of Science and Technology, Kunming 650032, China
- Correspondence:
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Gu F, Gong A, Qu Y, Bao A, Wu J, Jiang C, Fu Y. From Expert to Elite? — Research on Top Archer’s EEG Network Topology. Front Hum Neurosci 2022; 16:759330. [PMID: 35280210 PMCID: PMC8916709 DOI: 10.3389/fnhum.2022.759330] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 01/14/2022] [Indexed: 12/17/2022] Open
Abstract
It is not only difficult to be a sports expert but also difficult to grow from a sports expert to a sports elite. Professional athletes are often concerned about the differences between an expert and an elite and how to eventually become an elite athlete. To explore the differences in brain neural mechanism between experts and elites in the process of motor behavior and reveal the internal connection between motor performance and brain activity, we collected and analyzed the electroencephalography (EEG) findings of 14 national archers and 14 provincial archers during aiming and resting states and constructed the EEG brain network of the two archer groups based on weighted phase lag index; the graph theory was used to analyze and compare the network characteristics via local network and global network topologies. The results showed that compared with the expert archers, the elite archers had stronger functional coupling in beta1 and beta2 bands, and the difference was evident in the frontal and central regions; in terms of global characteristics of brain network topology, the average clustering coefficient and global efficiency of elite archers were significantly higher than that of expert archers, and the eigenvector centrality of expert archers was higher; for local characteristics, elite archers had higher local efficient; and the brain network characteristics of expert archers showed a strong correlation with archery performance. This suggests that compared with expert archers, elite archers showed stronger functional coupling, higher integration efficiency of global and local information, and more independent performance in the archery process. These findings reveal the differences in brain electrical network topologies between elite and expert archers in the archery preparation stage, which is expected to provide theoretical reference for further training and promotion of professional athletes.
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Affiliation(s)
- Feng Gu
- School of Information Engineering, Engineering University of People’s Armed Police, Xi’an, China
| | - Anmin Gong
- School of Information Engineering, Engineering University of People’s Armed Police, Xi’an, China
- *Correspondence: Anmin Gong,
| | - Yi Qu
- School of Information Engineering, Engineering University of People’s Armed Police, Xi’an, China
| | - Aiyong Bao
- School of Military Basic Education, Engineering University of People’s Armed Police, Xi’an, China
| | - Jin Wu
- Department of Physical Education, Beijing City University, Beijing, China
| | - Changhao Jiang
- Key Laboratory of Sports Performance Evaluation and Technical Analysis, Capital Institute of Physical Education, Beijing, China
| | - Yunfa Fu
- School of Automation and Information Engineering, Kunming University of Science and Technology, Kunming, China
- Yunfa Fu,
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7
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Hamilton BR, Guppy FM, Barrett J, Seal L, Pitsiladis Y. Integrating transwomen athletes into elite competition: The case of elite archery and shooting. Eur J Sport Sci 2021; 21:1500-1509. [PMID: 34077312 DOI: 10.1080/17461391.2021.1938692] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The inclusion of transwomen into elite female sport has been brought into question recently with World Rugby banning transwomen from the elite female competition, aiming to prioritise safety over fairness and inclusion, citing the size, force and power-producing advantages conferred to transwomen. The same question is being asked of all Olympic sports including non-contact sports such as archery and shooting. As both these Olympic sports are the polar opposite to the contact sport of rugby in terms of the need to consider the safety of athletes, the IF of both archery and shooting should consider the other elements when deciding the integration of trans individuals in their sports. Studies on non-athletic transwomen have reported muscle mass and strength loss in the range of 5-10% after 1 year of their transition, with these differences no longer apparent after 2 years. Therefore, based on the current scientific literature, it would be justified for meaningful competition and to prioritise fairness, that transwomen be permitted to compete in elite archery after 2 years of GAT. Similarly, it would be justified in terms of shooting to prioritise inclusion and allow transwomen after 1 year of GAT given that the only negligible advantage that transwomen may have is superior visuospatial coordination. The impact of this considered integration of transwomen in elite sports such as archery and shooting could be monitored and lessons learned for other sports, especially where there are no safety concerns from contact with an opponent.
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Affiliation(s)
- Blair R Hamilton
- Centre for Stress and Age-related Disease, University of Brighton, Brighton, UK.,The Gender Identity Clinic Tavistock and Portman NHS Foundation Trust, London, UK
| | - Fergus M Guppy
- Centre for Stress and Age-related Disease, University of Brighton, Brighton, UK
| | - James Barrett
- The Gender Identity Clinic Tavistock and Portman NHS Foundation Trust, London, UK
| | - Leighton Seal
- The Gender Identity Clinic Tavistock and Portman NHS Foundation Trust, London, UK
| | - Yannis Pitsiladis
- Centre for Stress and Age-related Disease, University of Brighton, Brighton, UK.,University of Rome "Foro Italico", Rome, Italy.,Centre for Exercise Sciences and Sports Medicine, FIMS Collaborating Centre of Sports Medicine, Rome, Italy.,European Federation of Sports Medicine Associations (EFSMA), Lausanne, Switzerland.,International Federation of Sports Medicine (FIMS), Lausanne, Switzerland
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8
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Preshooting Electroencephalographic Activity of Professional Shooters in a Competitive State. COMPUTATIONAL INTELLIGENCE AND NEUROSCIENCE 2021; 2021:6639865. [PMID: 33628214 PMCID: PMC7889390 DOI: 10.1155/2021/6639865] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/02/2021] [Accepted: 01/11/2021] [Indexed: 11/17/2022]
Abstract
This study investigated the influence of competitive state on cerebral cortex activity of professional shooters with 10 m air rifle before shooting. Generally, professional athletes have higher neural efficiency compared with ordinary people. We recruited 11 national shooters to complete 60 shots under both noncompetitive and competitive shooting conditions, and simultaneously collected their electroencephalogram (EEG) and electrocardiogram (ECG) information. Theta, alpha, and beta power were computed in the last three seconds preceding each shot from average-reference 29-channel EEG, while EEG characteristics under two conditions were analyzed. The results showed a significant linear correlation between shooting accuracy and EEG power of anterior frontal, central, temporal, and occipital regions in beta and theta bands. In addition, the theta power in occipital regions, alpha power in frontal-central and left occipital regions, and beta power in frontal and mid-occipital regions were higher than those in noncompetitive state. However, heart rate (HR) and shooting accuracy did not change significantly under the two conditions. These findings reveal the changes of cortical activity underlying competition shooting as well as providing further understanding of the neural mechanisms of the shooting process and lay a foundation for the subsequent neuromodulation research.
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Rocha K, Marinho V, Magalhães F, Carvalho V, Fernandes T, Ayres M, Crespo E, Velasques B, Ribeiro P, Cagy M, Bastos VH, Gupta DS, Teixeira S. Unskilled shooters improve both accuracy and grouping shot having as reference skilled shooters cortical area: An EEG and tDCS study. Physiol Behav 2020; 224:113036. [PMID: 32598941 DOI: 10.1016/j.physbeh.2020.113036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 12/18/2022]
Abstract
Transcranial direct current stimulation (tDCS) has been used as a non-invasive method for enhanced motor and cognitive abilities. However, no previous study has investigated if the tDCS application in unskilled shooters on cortical sites, selected based on the cortical activity of skilled shooters, improves the accuracy and shot grouping. Sixty participants were selected, which included 10 skilled shooters and 50 unskilled shooters. After we identified the right dorsolateral prefrontal cortex (DLPFC) as the area with the highest activity in skilled shooters, we applied anodal tDCS over the right DLPFC in the unskilled shooters under two conditions: sham-tDCS (placebo) and real-tDCS (anodal tDCS). We also analyzed electroencephalography. Our results indicated that anodal tDCS application enhanced the shot accuracy (p = 0.001). Furthermore, the beta power in the EEG recording was higher in the left DLPFC, left and right parietal cortex (p = 0,001) after applying anodal tDCS, while the low-gamma power was higher in the right DLPFC in sham-tDCS (p = 0.001) and right parietal cortex after anodal-tDCS (p = 0.001). Our findings indicate that anodal tDCS can improve accuracy and shot grouping when applied over the unskilled shooters' right DLPFC. Furthermore, beta and low-gamma bands are influenced by anodal tDCS over the right DLPFC, which may be predictive of skill improvement.
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Affiliation(s)
- Kaline Rocha
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil; The Northeast Biotechnology Network, Federal University of Piauí, Teresina, Brazil.
| | - Victor Marinho
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil; The Northeast Biotechnology Network, Federal University of Piauí, Teresina, Brazil
| | - Francisco Magalhães
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil; The Northeast Biotechnology Network, Federal University of Piauí, Teresina, Brazil
| | - Valécia Carvalho
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil; The Northeast Biotechnology Network, Federal University of Piauí, Teresina, Brazil
| | - Thayaná Fernandes
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil
| | - Marcos Ayres
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil; The Northeast Biotechnology Network, Federal University of Piauí, Teresina, Brazil
| | - Eric Crespo
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil
| | - Bruna Velasques
- Brain Mapping and Sensory Motor Integration Laboratory, Institute of Psychiatry of Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pedro Ribeiro
- Brain Mapping and Sensory Motor Integration Laboratory, Institute of Psychiatry of Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mauricio Cagy
- Biomedical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Victor Hugo Bastos
- The Northeast Biotechnology Network, Federal University of Piauí, Teresina, Brazil; Brain Mapping and Functionality Laboratory, Federal University of Delta do Parnaíba, Parnaíba, Brazil
| | - Daya S Gupta
- Department of Biology, Camden County College, Blackwood, NJ, United States
| | - Silmar Teixeira
- Neuro-innovation Technology & Brain Mapping Laboratory, Federal University of Delta of Parnaíba, Parnaíba, Brazil; The Northeast Biotechnology Network, Federal University of Piauí, Teresina, Brazil
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10
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Zhou X, Yang K. A denoising representation framework for underwater acoustic signal recognition. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2020; 147:EL377. [PMID: 32359275 DOI: 10.1121/10.0001130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 04/03/2020] [Indexed: 06/11/2023]
Abstract
To suppress the noise interference in underwater acoustic signals for recognition, a practical denoising representation and recognition method is proposed. This algorithm first generates the multi-images between marine noise and target signal by correlation and "dropout" processing, adaptively. Second, a convolutional denoising autoencoder is designed to train the segmented multi-images in parallel to acquire denoising features. Finally, to improve the classification accuracy of random forest (RF), the weight fusion is exploited to initialize parallel RF classifier. Numerical experiments are shown that demonstrate superiority to three other methods in feature denoising and classification under underwater acoustic scenes.
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Affiliation(s)
- Xingyue Zhou
- School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, ,
| | - Kunde Yang
- School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, ,
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11
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Fogelson N, Diaz-Brage P, Li L, Peled A, Klein E. Functional connectivity abnormalities during processing of predictive stimuli in patients with major depressive disorder. Brain Res 2020; 1727:146543. [DOI: 10.1016/j.brainres.2019.146543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 10/24/2019] [Accepted: 11/05/2019] [Indexed: 12/11/2022]
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