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Ye X, Peng L, Sun N, He L, Yang X, Zhou Y, Xiong J, Shen Y, Sun R, Liang F. Hotspots and trends in fNIRS disease research: A bibliometric analysis. Front Neurosci 2023; 17:1097002. [PMID: 36937686 PMCID: PMC10017540 DOI: 10.3389/fnins.2023.1097002] [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: 11/13/2022] [Accepted: 02/17/2023] [Indexed: 03/06/2023] Open
Abstract
Objective To summarize the general information and hotspots of functional near-infrared spectroscopy (fNIRS)-based clinical disease research over the past 10 years and provide some references for future research. Methods The related literature published between 1 January 2011 and 31 January 2022 was retrieved from the Web of Science core database (WoS). Bibliometric visualization analysis of countries/regions, institutions, authors, journals, keywords and references were conducted by using CiteSpace 6.1.R3. Results A total of 467 articles were included, and the annual number of articles published over nearly a decade showed an upward trend year-by-year. These articles mainly come from 39 countries/regions and 280 institutions. The representative country and institution were the USA and the University of Tubingen. We identified 266 authors, among which Andreas J Fallgatter and Ann-Christine Ehlis were the influential authors. Neuroimage was the most co-cited journal. The major topics in fNIRS disease research included activation, prefrontal cortex, working memory, cortex, and functional magnetic resonance imaging (fMRI). In recent years, the Frontier topics were executive function, functional connectivity, performance, diagnosis, Alzheimer's disease, children, and adolescents. Based on the burst of co-cited references, gait research has received much attention. Conclusion This study conducted a comprehensive, objective, and visual analysis of publications, and revealed the status of relevant studies, hot topics, and trends concerning fNIRS disease research from 2011 to 2022. It is hoped that this work would help researchers to identify new perspectives on potential collaborators, important topics, and research Frontiers.
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Affiliation(s)
- Xiangyin Ye
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Li Peng
- Department of Ultrasound, The First People’s Hospital of Longquanyi District, Chengdu, China
| | - Ning Sun
- Rehabilitation Medicine Center and Institute of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Lian He
- Department of Ultrasound, The First People’s Hospital of Longquanyi District, Chengdu, China
| | - Xiuqiong Yang
- Department of Ultrasound, The First People’s Hospital of Longquanyi District, Chengdu, China
| | - Yuanfang Zhou
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jian Xiong
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yuquan Shen
- Department of Rehabilitation Medicine, The First People’s Hospital of Longquanyi District, Chengdu, China
| | - Ruirui Sun
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Ruirui Sun,
| | - Fanrong Liang
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Fanrong Liang,
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2
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Li R, Hosseini H, Saggar M, Balters SC, Reiss AL. Current opinions on the present and future use of functional near-infrared spectroscopy in psychiatry. NEUROPHOTONICS 2023; 10:013505. [PMID: 36777700 PMCID: PMC9904322 DOI: 10.1117/1.nph.10.1.013505] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 01/13/2023] [Indexed: 05/19/2023]
Abstract
Functional near-infrared spectroscopy (fNIRS) is an optical imaging technique for assessing human brain activity by noninvasively measuring the fluctuation of cerebral oxygenated- and deoxygenated-hemoglobin concentrations associated with neuronal activity. Owing to its superior mobility, low cost, and good tolerance for motion, the past few decades have witnessed a rapid increase in the research and clinical use of fNIRS in a variety of psychiatric disorders. In this perspective article, we first briefly summarize the state-of-the-art concerning fNIRS research in psychiatry. In particular, we highlight the diverse applications of fNIRS in psychiatric research, the advanced development of fNIRS instruments, and novel fNIRS study designs for exploring brain activity associated with psychiatric disorders. We then discuss some of the open challenges and share our perspectives on the future of fNIRS in psychiatric research and clinical practice. We conclude that fNIRS holds promise for becoming a useful tool in clinical psychiatric settings with respect to developing closed-loop systems and improving individualized treatments and diagnostics.
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Affiliation(s)
- Rihui Li
- Stanford University, Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford, California, United States
| | - Hadi Hosseini
- Stanford University, Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford, California, United States
| | - Manish Saggar
- Stanford University, Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford, California, United States
| | - Stephanie Christina Balters
- Stanford University, Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford, California, United States
| | - Allan L. Reiss
- Stanford University, Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford, California, United States
- Stanford University, Department of Radiology and Pediatrics, Stanford, California, United States
- Stanford University, Department of Pediatrics, Stanford, California, United States
- Address all correspondence to Allan L. Reiss,
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3
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Differentiation of task complexity in long-term memory retrieval using multifractal detrended fluctuation analysis of fNIRS recordings. Exp Brain Res 2022; 240:1701-1711. [DOI: 10.1007/s00221-022-06365-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 04/04/2022] [Indexed: 11/26/2022]
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4
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Hu S, Li XJ, Law S, Shen CY, Yao GQ, Zhang XQ, Li J, Chen GF, Xu B, Liu XM, Ma XY, Feng K, Liu PZ. Prefrontal cortex alterations in major depressive disorder, generalized anxiety disorder and their comorbidity during a verbal fluency task assessed by multi-channel near-infrared spectroscopy. Psychiatry Res 2021; 306:114229. [PMID: 34749225 DOI: 10.1016/j.psychres.2021.114229] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/17/2021] [Accepted: 09/26/2021] [Indexed: 01/04/2023]
Abstract
Major depressive disorder (MDD) and generalized anxiety disorder (GAD) are frequently comorbid with each other, and both associated with substantial cognitive impairments; however, it is still unclear whether their impairments are neurobiologically similar or distinct. This study aims to investigate the cognitive functions of the prefrontal cortex (PFC) in patients with MDD and GAD during the verbal fluency task (VFT) using functional near-infrared spectroscopy (fNIRS). Fifty-two patients with MDD, fifty-one patients with GAD, fifty-two patients with the comorbidity of MDD and GAD (CMG), and forty-seven healthy controls (HC) participated in the study. Significant hypoactivation in the left ventrolateral and the left dorsolateral PFC was common in all patient groups when compared to HCs, suggesting a shared etiology. Furthermore, MDD patients showed significant hypoactivation at the right frontal pole cortex (FPoC) when compared to HCs and significant hypoactivation at the middle FPoC when compared to the CMG patients. Our work is the first fNIRS study to reveal the shared and unique neurobiological profiles of MDD, GAD and their comorbidity under the same standard experimentation condition, suggesting fNIRS holds promise as an adjutant to assist clinical diagnosis.
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Affiliation(s)
- Shuang Hu
- School of Medicine, Tsinghua University, Beijing, China
| | - Xiao-Jun Li
- School of Medicine, Tsinghua University, Beijing, China
| | - Samuel Law
- Department of Psychiatry, Faculty of Medicine, University of Toronto, Canada
| | - Chen-Yu Shen
- Department of Psychiatry, Beijing Yuquan Hospital, Tsinghua University, Beijing, China
| | - Guan-Qun Yao
- School of Medicine, Tsinghua University, Beijing, China
| | - Xiao-Qian Zhang
- Department of Psychiatry, Beijing Yuquan Hospital, Tsinghua University, Beijing, China
| | - Juan Li
- School of Medicine, Tsinghua University, Beijing, China; Department of Psychiatry, Beijing Yuquan Hospital, Tsinghua University, Beijing, China
| | - Gui-Fang Chen
- School of Medicine, Tsinghua University, Beijing, China; Department of Psychiatry, Beijing Yuquan Hospital, Tsinghua University, Beijing, China
| | - Bo Xu
- Department of Psychiatry, Beijing Yuquan Hospital, Tsinghua University, Beijing, China
| | - Xiao-Min Liu
- Department of Neurology and Psychiatry, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Xiang-Yun Ma
- Beijing Sixth Hospital, Peking University, Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health, National Clinical Research Center for Mental Disorders, Beijing, China
| | - Kun Feng
- Department of Psychiatry, Beijing Yuquan Hospital, Tsinghua University, Beijing, China.
| | - Po-Zi Liu
- School of Medicine, Tsinghua University, Beijing, China; Department of Psychiatry, Beijing Yuquan Hospital, Tsinghua University, Beijing, China.
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5
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Narita N, Kamiya K, Iwaki S, Ishii T, Endo H, Shimosaka M, Uchida T, Kantake I, Shibutani K. Activation of Prefrontal Cortex in Process of Oral and Finger Shape Discrimination: fNIRS Study. Front Neurosci 2021; 15:588593. [PMID: 33633532 PMCID: PMC7901927 DOI: 10.3389/fnins.2021.588593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 01/04/2021] [Indexed: 11/24/2022] Open
Abstract
Background The differences in the brain activities of the insular and the visual association cortices have been reported between oral and manual stereognosis. However, these results were not conclusive because of the inherent differences in the task performance-related motor sequence conditions. We hypothesized that the involvement of the prefrontal cortex may be different between finger and oral shape discrimination. This study was conducted to clarify temporal changes in prefrontal activities occurring in the processes of oral and finger tactual shape discrimination using prefrontal functional near-infrared spectroscopy (fNIRS). Methods Six healthy right-handed males [aged 30.8 ± 8.2 years (mean ± SD)] were enrolled. Measurements of prefrontal activities were performed using a 22-channel fNIRS device (ETG-100, Hitachi Medical Co., Chiba, Japan) during experimental blocks that included resting state (REST), nonsense shape discrimination (SHAM), and shape discrimination (SHAPE). Results No significant difference was presented with regard to the number of correct answers during trials between oral and finger SHAPE discrimination. Additionally, a statistical difference for the prefrontal fNIRS activity between oral and finger shape discrimination was noted in CH 1. Finger SHAPE, as compared with SHAM, presented a temporally shifting onset and burst in the prefrontal activities from the frontopolar area (FPA) to the orbitofrontal cortex (OFC). In contrast, oral SHAPE as compared with SHAM was shown to be temporally overlapped in the onset and burst of the prefrontal activities in the dorsolateral prefrontal cortex (DLPFC)/FPA/OFC. Conclusion The prefrontal activities temporally shifting from the FPA to the OFC during SHAPE as compared with SHAM may suggest the segregated serial prefrontal processing from the manipulation of a target image to the decision making during the process of finger shape discrimination. In contrast, the temporally overlapped prefrontal activities of the DLPFC/FPA/OFC in the oral SHAPE block may suggest the parallel procession of the repetitive involvement of generation, manipulation, and decision making in order to form a reliable representation of target objects.
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Affiliation(s)
- Noriyuki Narita
- Research Institute of Oral Science, Nihon University School of Dentistry at Matsudo, Matsudo, Japan
| | - Kazunobu Kamiya
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Japan
| | - Sunao Iwaki
- Mental and Physical Functions Modeling Group, Human Informatics and Interaction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Tomohiro Ishii
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Japan
| | - Hiroshi Endo
- Physical Fitness Technology Group, Human Informatics and Interaction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Michiharu Shimosaka
- Department of Anesthesiology, Nihon University School of Dentistry at Matsudo, Matsudo, Japan
| | | | | | - Koh Shibutani
- Department of Anesthesiology, Nihon University School of Dentistry at Matsudo, Matsudo, Japan
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Chou PH, Yao YH, Zheng RX, Liou YL, Liu TT, Lane HY, Yang AC, Wang SC. Deep Neural Network to Differentiate Brain Activity Between Patients With First-Episode Schizophrenia and Healthy Individuals: A Multi-Channel Near Infrared Spectroscopy Study. Front Psychiatry 2021; 12:655292. [PMID: 33935840 PMCID: PMC8081971 DOI: 10.3389/fpsyt.2021.655292] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 03/16/2021] [Indexed: 11/22/2022] Open
Abstract
Backgrounds: Reduced brain cortical activity over the frontotemporal regions measured by near infrared spectroscopy (NIRS) has been reported in patients with first-episode schizophrenia (FES). This study aimed to differentiate between patients with FES and healthy controls (HCs) on basis of the frontotemporal activity measured by NIRS with a support vector machine (SVM) and deep neural network (DNN) classifier. In addition, we compared the accuracy of performance of SVM and DNN. Methods: In total, 33 FES patients and 34 HCs were recruited. Their brain cortical activities were measured using NIRS while performing letter and category versions of verbal fluency tests (VFTs). The integral and centroid values of brain cortical activity in the bilateral frontotemporal regions during the VFTs were selected as features in SVM and DNN classifier. Results: Compared to HCs, FES patients displayed reduced brain cortical activity over the bilateral frontotemporal regions during both types of VFTs. Regarding the classifier performance, SVM reached an accuracy of 68.6%, sensitivity of 70.1%, and specificity of 64.6%, while DNN reached an accuracy of 79.7%, sensitivity of 88.8%, and specificity of 74.9% in the classification of FES patients and HCs. Conclusions: Compared to findings of previous structural neuroimaging studies, we found that using DNN to measure the NIRS signals during the VFTs to differentiate between FES patients and HCs could achieve a higher accuracy, indicating that NIRS can be used as a potential marker to classify FES patients from HCs. Future additional independent datasets are needed to confirm the validity of our model.
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Affiliation(s)
- Po-Han Chou
- Department of Psychiatry, China Medical University Hsinchu Hospital, Hsinchu, Taiwan.,Department of Photonics, National Chiao Tung University, Hsinchu, Taiwan.,Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Yun-Han Yao
- MediaTek Inc., Hsinchu, Taiwan.,Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan
| | - Rui-Xuan Zheng
- MediaTek Inc., Hsinchu, Taiwan.,Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan
| | - Yi-Long Liou
- MediaTek Inc., Hsinchu, Taiwan.,Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan
| | - Tsung-Te Liu
- Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan
| | - Hsien-Yuan Lane
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Psychiatry and Brain Disease Research Center, China Medical University Hospital, Taichung, Taiwan.,Department of Psychology, College of Medical and Health Sciences, Asia University, Taichung, Taiwan
| | - Albert C Yang
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.,Digital Medicine Center, National Yang-Ming University, Taipei, Taiwan.,Brain Medicine Center, Taoyuan Psychiatric Center, Taoyuan, Taiwan
| | - Shao-Cheng Wang
- Department of Forensic and Addiction Psychiatry, Jianan Psychiatric Center, Ministry of Health and Welfare, Tainan, Taiwan.,Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States.,Department of Medical Laboratory Science and Biotechnology, Chung Hwa University of Medical Technology, Tainan, Taiwan
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7
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Li J, Mu J, Shen C, Yao G, Feng K, Zhang X, Liu P. Abnormal Cortical Activation Patterns Among Chinese-Speaking Schizophrenia Patients During Category and Letter Verbal Fluency Tasks Revealed by Multi-Channel Functional Near-Infrared Spectroscopy. Front Psychiatry 2021; 12:790732. [PMID: 34899442 PMCID: PMC8663721 DOI: 10.3389/fpsyt.2021.790732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/03/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Functional near-infrared spectroscopy (fNIRS) has many advantages over other neuroimaging modalities for routine measurement of task-dependent cortical activation, but most fNIRS studies of schizophrenia have used letter fluency tasks (LFTs). Further, performances on category fluency tasks (CFTs) and LFTs may be distinct in Chinese patients due to the unique semantic features of Chinese written characters. To identify unique disease biomarkers measurable by fNIRS in Chinese schizophrenia patients, this study compared cortical oxygenated hemoglobin changes ([oxy-Hb]) during a Chinese LFT and CFT between patients and healthy controls. Methods: Inpatients of the Second Affiliated Hospital of Xinxiang Medical University were recruited from Match 2020 to July 2021. The Positive and Negative Symptom Scale (PANSS) was used to evaluate psychiatric symptoms. Dynamic changes in [oxy-Hb], an indicator of neural activity, were measured during CFT and LFT performance by 52-channel fNIRS. Results: Forty-seven schizophrenia inpatients and 29 healthy controls completed all tests. Schizophrenia patients showed significant cortical activation at 15 channels covering the left hemisphere and 17 channels over the right hemisphere during the CFT. During the LFT, activity was significantly increased at only six channels, all over the left hemisphere (FDR P < 0.05). In healthy controls, significant [oxy-Hb] increases were found at 24 channels over the left hemisphere and 19 channels over the right hemisphere during CFT. While during the LFT, the significant increases were found at 7 channels all over the left hemisphere (FDR P < 0.05). When years of education was included as a covariate, the schizophrenia group demonstrated no significant hypoactivation relative to healthy controls at any channel after FDR correction (FDR P < 0.05) during CFT while demonstrated significant hypoactivation at channel 11 during LFT (FDR P < 0.05). There were no significant associations between PANSS scores and [oxy-Hb] changes after FDR correction (FDR P < 0.05). Conclusions: Left lateralization during CFT was reduced among schizophrenia patients and may be related to the semantic deficit. The Chinese-CFT could be a more sensitive indicator of frontal-temporal dysfunction in schizophrenia.
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Affiliation(s)
- Juan Li
- School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Junlin Mu
- Department of Neuroelectrophysiology, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Chenyu Shen
- Department of Psychiatry, Tsinghua University Yuquan Hospital (Tsinghua University Hospital of Integrated Traditional Chinese and Western Medicine), Beijing, China
| | - Guanqun Yao
- School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Kun Feng
- Department of Psychiatry, Tsinghua University Yuquan Hospital (Tsinghua University Hospital of Integrated Traditional Chinese and Western Medicine), Beijing, China
| | - Xiaoqian Zhang
- Department of Psychiatry, Tsinghua University Yuquan Hospital (Tsinghua University Hospital of Integrated Traditional Chinese and Western Medicine), Beijing, China
| | - Pozi Liu
- School of Clinical Medicine, Tsinghua University, Beijing, China.,Department of Psychiatry, Tsinghua University Yuquan Hospital (Tsinghua University Hospital of Integrated Traditional Chinese and Western Medicine), Beijing, China
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8
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EEG Source Network for the Diagnosis of Schizophrenia and the Identification of Subtypes Based on Symptom Severity-A Machine Learning Approach. J Clin Med 2020; 9:jcm9123934. [PMID: 33291657 PMCID: PMC7761931 DOI: 10.3390/jcm9123934] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/26/2020] [Accepted: 12/02/2020] [Indexed: 12/12/2022] Open
Abstract
A precise diagnosis and a comprehensive assessment of symptom severity are important clinical issues in patients with schizophrenia (SZ). We investigated whether electroencephalography (EEG) features obtained from EEG source network analyses could be effectively applied to classify the SZ subtypes based on symptom severity. Sixty-four electrode EEG signals were recorded from 119 patients with SZ (53 males and 66 females) and 119 normal controls (NC, 51 males and 68 females) during resting-state with closed eyes. Brain network features (global and local clustering coefficient and global path length) were calculated from EEG source activities. According to positive, negative, and cognitive/disorganization symptoms, the SZ patients were divided into two groups (high and low) by positive and negative syndrome scale (PANSS). To select features for classification, we used the sequential forward selection (SFS) method. The classification accuracy was evaluated using 10 by 10-fold cross-validation with the linear discriminant analysis (LDA) classifier. The best classification accuracy was 80.66% for estimating SZ patients from the NC group. The best classification accuracy between low and high groups in positive, negative, and cognitive/disorganization symptoms were 88.10%, 75.25%, and 77.78%, respectively. The selected features well-represented the pathological brain regions of SZ. Our study suggested that resting-state EEG network features could successfully classify between SZ patients and the NC, and between low and high SZ groups in positive, negative, and cognitive/disorganization symptoms.
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9
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Prefrontal dysfunction associated with a history of suicide attempts among patients with recent onset schizophrenia. NPJ SCHIZOPHRENIA 2020; 6:29. [PMID: 33127917 PMCID: PMC7599216 DOI: 10.1038/s41537-020-00118-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 09/04/2020] [Indexed: 11/08/2022]
Abstract
Suicide is a major cause of death in patients with schizophrenia, particularly among those with recent disease onset. Although brain imaging studies have identified the neuroanatomical correlates of suicidal behavior, functional brain activity correlates particularly in patients with recent-onset schizophrenia (ROSZ) remain unknown. Using near-infrared spectroscopy (NIRS) recording with a high-density coverage of the prefrontal area, we investigated whether prefrontal activity is altered in patients with ROSZ having a history of suicide attempts. A 52-channel NIRS system was used to examine hemodynamic changes in patients with ROSZ that had a history of suicide attempts (n = 24) or that lacked such a history (n = 62), and age- and sex-matched healthy controls (n = 119), during a block-design letter fluency task (LFT). Patients with a history of suicide attempts exhibited decreased activation in the right dorsolateral prefrontal cortex compared with those without such a history. Our findings indicate that specific regions of the prefrontal cortex may be associated with suicidal attempts, which may have implications for early intervention for psychosis.
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10
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Yang J, Ji X, Quan W, Liu Y, Wei B, Wu T. Classification of Schizophrenia by Functional Connectivity Strength Using Functional Near Infrared Spectroscopy. Front Neuroinform 2020; 14:40. [PMID: 33117140 PMCID: PMC7575761 DOI: 10.3389/fninf.2020.00040] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 07/22/2020] [Indexed: 01/21/2023] Open
Abstract
Functional near-infrared spectroscopy (fNIRS) has been widely employed in the objective diagnosis of patients with schizophrenia during a verbal fluency task (VFT). Most of the available methods depended on the time-domain features extracted from the data of single or multiple channels. The present study proposed an alternative method based on the functional connectivity strength (FCS) derived from an individual channel. The data measured 100 patients with schizophrenia and 100 healthy controls, who were used to train the classifiers and to evaluate their performance. Different classifiers were evaluated, and support machine vector achieved the best performance. In order to reduce the dimensional complexity of the feature domain, principal component analysis (PCA) was applied. The classification results by using an individual channel, a combination of several channels, and 52 ensemble channels with and without the dimensional reduced technique were compared. It provided a new approach to identify schizophrenia, improving the objective diagnosis of this mental disorder. FCS from three channels on the medial prefrontal and left ventrolateral prefrontal cortices rendered accuracy as high as 84.67%, sensitivity at 92.00%, and specificity at 70%. The neurophysiological significance of the change at these regions was consistence with the major syndromes of schizophrenia.
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Affiliation(s)
- Jiayi Yang
- China Academy of Information and Communications Technology, Beijing, China.,Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China
| | - Xiaoyu Ji
- China Academy of Information and Communications Technology, Beijing, China
| | - Wenxiang Quan
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China
| | - Yunshan Liu
- China Academy of Information and Communications Technology, Beijing, China.,School of Computer Science and Technology, Donghua University, Shanghai, China
| | - Bowen Wei
- China Academy of Information and Communications Technology, Beijing, China.,School of Computer Science and Technology, Xidian University, Xian, China
| | - Tongning Wu
- China Academy of Information and Communications Technology, Beijing, China
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11
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Classification of Schizophrenia by Seed-based Functional Connectivity using Prefronto-Temporal Functional Near Infrared Spectroscopy. J Neurosci Methods 2020; 344:108874. [PMID: 32710923 DOI: 10.1016/j.jneumeth.2020.108874] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 07/13/2020] [Accepted: 07/20/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND Schizophrenia is one of the most serious mental disorders. Currently, the diagnosis of schizophrenia mainly relies on scales and doctors' experience. Recently, functional near infrared spectroscopy (fNIRS) has been used to distinguish schizophrenia from other mental disorders. The conventional classification methods utilized time-course features from single or multiple fNIRS channels. NEW METHOD The fNIRS data were obtained from 52 channels covering the frontotemporal cortices in 200 patients with schizophrenia and 100 healthy subjects during a Chinese verbal fluency task. The channels with significant between-group differences were selected as the seeds. Functional connectivity (FC) was calculated for each seed, and FCs with significant between-group differences were selected as the features for classification. RESULTS The proposed method reduced the number of channels to 26 while achieving overall classification accuracy, sensitivity and specificity values as high as 89.67%, 93.00% and 86.00%, respectively, outperforming most of the reported results. The superior performance was attributed to the cross-scale neurological changes related to schizophrenia, which were employed by the classification method. In addition, the method provided multiple classification criteria with similar accuracy, consequently increasing the flexibility and reliability of the results. COMPARISON WITH EXISTING METHODS This is the first fNIRS study to classify schizophrenia based on FCs. This method integrated information from regional modulation, segregation and integration. The classification performance outperformed most of the classification methods described in previous studies. CONCLUSIONS Our findings suggest a reliable method with a high level of accuracy and a low level of instrumental complexity to identify patients with schizophrenia.
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12
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Validating a functional near-infrared spectroscopy diagnostic paradigm for Major Depressive Disorder. Sci Rep 2020; 10:9740. [PMID: 32546704 PMCID: PMC7298029 DOI: 10.1038/s41598-020-66784-2] [Citation(s) in RCA: 143] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 05/21/2020] [Indexed: 12/18/2022] Open
Abstract
Reduced haemodynamic response in the frontotemporal cortices of patients with major depressive disorder (MDD) has been demonstrated using functional near-infrared spectroscopy (fNIRS). Most notably, changes in cortical oxy-haemoglobin during a Japanese phonetic fluency task can differentiate psychiatric patients from healthy controls (HC). However, this paradigm has not been validated in the English language. Therefore, the present work aimed to distinguish patients with MDD from HCs, using haemodynamic response measured during an English letter fluency task. One hundred and five HCs and 105 patients with MDD took part in this study. NIRS signals during the verbal fluency task (VFT) was acquired using a 52-channel system, and changes in oxy-haemoglobin in the frontal and temporal regions were quantified. Depression severity, psychosocial functioning, pharmacotherapy and psychiatric history were noted. Patients with MDD had smaller changes in oxy-haemoglobin in the frontal and temporal cortices than HCs. In both regions of interest, oxy-haemoglobin was not associated with any of the clinical variables studied. 75.2% and 76.5% of patients with MDD were correctly classified using frontal and temporal region oxy-haemoglobin, respectively. Haemodynamic response measured by fNIRS during an English letter fluency task is a promising biomarker for MDD.
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Verbal fluency as a possible predictor for psychosis. Eur Psychiatry 2020; 25:105-10. [DOI: 10.1016/j.eurpsy.2009.08.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Revised: 07/05/2009] [Accepted: 08/10/2009] [Indexed: 11/30/2022] Open
Abstract
AbstractBackgroundNeurocognitive abnormalities are prevalent in both first episode schizophrenia patients and in ultra high risk (UHR) patients.AimTo compare verbal fluency performance at baseline in UHR in patients that did and did not make the transition to psychosis.MethodBaseline verbal fluency performance in UHR-patients (n = 47) was compared to match first episode patients (n = 69) and normal controls (n = 42).ResultsVerbal fluency (semantic category) scores in UHR-patients did not differ significantly from the score in first episode schizophrenia patients. Both the UHR group (p < 0.003) and the patient group (p < 0.0001) performed significantly worse than controls. Compared to the non-transition group, the transition group performed worse on verbal fluency, semantic category (p < 0.006) at baseline.ConclusionsVerbal fluency (semantic category) is disturbed in UHR-patients that make the transition to psychosis and could contribute to an improved prediction of transition to psychosis in UHR-patients.
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Williams Roberson S, Shah P, Piai V, Gatens H, Krieger AM, Lucas TH, Litt B. Electrocorticography reveals spatiotemporal neuronal activation patterns of verbal fluency in patients with epilepsy. Neuropsychologia 2020; 141:107386. [PMID: 32105726 DOI: 10.1016/j.neuropsychologia.2020.107386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 01/01/2020] [Accepted: 02/09/2020] [Indexed: 02/05/2023]
Abstract
Verbal fluency is commonly used to evaluate cognitive dysfunction in a variety of neuropsychiatric diseases, yet the neurobiology underlying performance of this task is incompletely understood. Electrocorticography (ECoG) provides a unique opportunity to investigate temporal activation patterns during cognitive tasks with high spatial and temporal precision. We used ECoG to study high gamma activity (HGA) patterns in patients undergoing presurgical evaluation for intractable epilepsy as they completed an overt, free-recall verbal fluency task. We examined regions demonstrating changes in HGA during specific timeframes relative to speech onset. Early pre-speech high gamma activity was present in left frontal regions during letter fluency and in bifrontal regions during category fluency. During timeframes typically associated with word planning, a distributed network was engaged including left inferior frontal, orbitofrontal and posterior temporal regions. Peri-Rolandic activation was observed during speech onset, and there was post-speech activation in the bilateral posterior superior temporal regions. Based on these observations in the context of prior studies, we propose a model of neocortical activity patterns underlying verbal fluency.
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Affiliation(s)
- Shawniqua Williams Roberson
- University of Pennsylvania, Center for Neuroengineering and Therapeutics, 240 South 33rd Street, Philadelphia, PA, 19104, USA.
| | - Preya Shah
- University of Pennsylvania, Center for Neuroengineering and Therapeutics, 240 South 33rd Street, Philadelphia, PA, 19104, USA
| | - Vitória Piai
- Radboud University, Donders Centre for Cognition, Montessorilaan 3, 6525HR, Nijmegen, the Netherlands; Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Department of Medical Psychology, Geert Grooteplein Zuid 10, 6525GA, Nijmegen, the Netherlands
| | - Heather Gatens
- University of Pennsylvania, Center for Neuroengineering and Therapeutics, 240 South 33rd Street, Philadelphia, PA, 19104, USA
| | - Abba M Krieger
- University of Pennsylvania, The Wharton School, 3730 Walnut Street, Philadelphia, PA, 19104, USA
| | - Timothy H Lucas
- University of Pennsylvania, Center for Neuroengineering and Therapeutics, 240 South 33rd Street, Philadelphia, PA, 19104, USA
| | - Brian Litt
- University of Pennsylvania, Center for Neuroengineering and Therapeutics, 240 South 33rd Street, Philadelphia, PA, 19104, USA
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Tao L, Zhu M, Cai Q. Neural substrates of Chinese lexical production: The role of domain-general cognitive functions. Neuropsychologia 2020; 138:107354. [DOI: 10.1016/j.neuropsychologia.2020.107354] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/27/2019] [Accepted: 01/17/2020] [Indexed: 11/15/2022]
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16
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Yeung MK, Lee TL, Chan AS. Frontal lobe dysfunction underlies the differential word retrieval impairment in adolescents with high-functioning autism. Autism Res 2019; 12:600-613. [PMID: 30758144 DOI: 10.1002/aur.2082] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/08/2019] [Accepted: 01/16/2019] [Indexed: 11/11/2022]
Abstract
There is substantial evidence of word retrieval impairment as indicated by poor performance on the category fluency test in autism spectrum disorder (ASD). However, little is known about the neural mechanisms underlying this impairment. Functional neuroimaging studies have shown that the lateral frontal cortex plays a key role in flexible word retrieval. Thus, we examined whether individuals with ASD exhibited altered frontal processing during the category fluency test using functional near-infrared spectroscopy (fNIRS). Twenty-two adolescents with high-functioning ASD (20 males) and 22 typically developing (TD) adolescents (16 males) aged 11-18 years were recruited. All underwent a category fluency paradigm, which required production of animal or means of transportation words for 1 min each although their frontal hemodynamic changes were recorded with fNIRS. We found that adolescents with ASD produced fewer animal but not transportation words (group-by-category interaction: P = 0.003), suggesting differential word retrieval impairment. In addition, unlike TD adolescents who exhibited activation primarily in lateral frontal regions during word production, adolescents with ASD had comparable activation across lateral and medial frontal regions. More importantly, this lack of lateral-medial distinction of activation, which was associated with poor word retrieval, differed significantly between groups only in the animal category (group-by-category interaction: P = 0.018). Thus, our findings implicate frontal lobe dysfunction in the impairment of differential word retrieval in adolescents with ASD. The relatively greater involvement of the medial frontopolar cortex might reflect the use of nonspecialized brain regions to compensate for the category-dependent difficulties with word retrieval in ASD. Autism Res 2019, 12: 600-613. © 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Using an optical imaging tool, we found that adolescents with autism had difficulties with producing semantically related words and exhibited frontal lobe dysfunction. Nonetheless, poor word production and altered brain processing was only seen when these adolescents were asked to produce words from a category of living things but not nonliving things (i.e., animals but not means of transportation). Category-dependent word retrieval problems and frontal lobe dysfunction might be two features of this disorder.
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Affiliation(s)
- Michael K Yeung
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada.,Neuropsychology Laboratory, Department of Psychology, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China
| | - Tsz L Lee
- Neuropsychology Laboratory, Department of Psychology, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China
| | - Agnes S Chan
- Neuropsychology Laboratory, Department of Psychology, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China.,Chanwuyi Research Center for Neuropsychological Well-Being, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China
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Prefrontal cortex dysfunction during verbal fluency task after atypicalantipsychotic treatment in schizophrenia: A near-infrared spectroscopy imaging study. Neurosci Lett 2018; 686:101-105. [DOI: 10.1016/j.neulet.2018.09.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 07/27/2018] [Accepted: 09/02/2018] [Indexed: 11/18/2022]
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18
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Bonetti LV, Hassan SA, Lau ST, Melo LT, Tanaka T, Patterson KK, Reid WD. Oxyhemoglobin changes in the prefrontal cortex in response to cognitive tasks: a systematic review. Int J Neurosci 2018; 129:195-203. [PMID: 30173620 DOI: 10.1080/00207454.2018.1518906] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF THE STUDY the aim of this study was to synthesize PFC fNIRS outcomes on the effects of cognitive tasks compared to resting/baseline tasks in healthy adults from studies utilizing a pre/post design. MATERIAL AND METHODS original research studies were searched from seven databases (MEDLINE, EMBASE, CENTRAL, CINAHL, SCOPUS, PEDro and PubMed). Subsequently, two independent reviewers screened the titles and abstracts followed by full-text reviews to assess the studies' eligibility. RESULTS eleven studies met the inclusion criteria and had data abstracted and quality assessed. Methodology varied considerably and yet cognitive tasks resulted in the ΔO2Hb increasing in 8 of the 11 and ΔHHb decreasing in 8 of 8 studies that reported this outcome. The cognitive tasks from 10 of the 11 studies were classified as "Working Memory" and "Verbal Fluency Tasks". CONCLUSIONS although, the data comparison was challenging provided the heterogeneity in methodology, the results across studies were similar.
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Affiliation(s)
- Leandro Viçosa Bonetti
- a Department of Physical Therapy , University of Toronto , Toronto, ON , Canada.,b Department of Physical Therapy , Universidade de Caxias do Sul , Rio Grande do Sul , Brazil
| | - Syed A Hassan
- a Department of Physical Therapy , University of Toronto , Toronto, ON , Canada.,c Rehabilitation Sciences Institute, University of Toronto , Toronto , ON , Canada
| | - Sin-Tung Lau
- d Department of Kinesiology and Physical Education , Wilfrid Laurier University , Waterloo , ON , Canada.,e Toronto Rehabilitation Institute, University Health Network , Toronto , ON , Canada
| | - Luana T Melo
- a Department of Physical Therapy , University of Toronto , Toronto, ON , Canada
| | - Takako Tanaka
- a Department of Physical Therapy , University of Toronto , Toronto, ON , Canada.,f Department of Cardiopulmonary Rehabilitation Science , Nagasaki University Graduate School of Biomedical Sciences , Nagasaki , Japan
| | - Kara K Patterson
- a Department of Physical Therapy , University of Toronto , Toronto, ON , Canada.,c Rehabilitation Sciences Institute, University of Toronto , Toronto , ON , Canada.,e Toronto Rehabilitation Institute, University Health Network , Toronto , ON , Canada
| | - W Darlene Reid
- a Department of Physical Therapy , University of Toronto , Toronto, ON , Canada.,c Rehabilitation Sciences Institute, University of Toronto , Toronto , ON , Canada.,e Toronto Rehabilitation Institute, University Health Network , Toronto , ON , Canada.,g Interdepartmental Division of Critical Care Medicine , University of Toronto , Toronto , ON , Canada
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Ehlis AC, Barth B, Hudak J, Storchak H, Weber L, Kimmig ACS, Kreifelts B, Dresler T, Fallgatter AJ. Near-Infrared Spectroscopy as a New Tool for Neurofeedback Training: Applications in Psychiatry and Methodological Considerations. JAPANESE PSYCHOLOGICAL RESEARCH 2018. [DOI: 10.1111/jpr.12225] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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20
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Barahimi S, Einalou Z, Dadgostar M. STUDIES ON SCHIZOPHRENIA AND DEPRESSIVE DISEASES BASED ON FUNCTIONAL NEAR-INFRARED SPECTROSCOPY. BIOMEDICAL ENGINEERING: APPLICATIONS, BASIS AND COMMUNICATIONS 2018. [DOI: 10.4015/s101623721830002x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Many investigations have been carried out on functional near infrared spectroscopy (fNIRS) applications in depression and schizophrenia patients that are most mysterious and costliest mental disorders in current society. fNIRS is a new optical method which assesses brain cortex hemodynamic and nervous activities non-invasively and it has been used in medicine as a study tool. Most of the researches of this approach have assessed the homodynamic response of frontal and temporal regions by means of various cognitive tasks. In this research, first, the cognitive task execution techniques have been explained concisely, and then some findings of fNIRS-based researches about depression and schizophrenia have been summarized and assessed. In fNIRS studies that have used various devices with different number of channels, the brain cortex functionality in schizophrenia and depressive patients has been investigated. The results demonstrate that a decrease in prefrontal regions activities can be observed in schizophrenia and depressive patients. Also more detailed studies illustrate ventrolateral, prefrontal and frontopolar region disorders. In severe depressive patients, a decrease in activities of prefrontal and temporal regions has been detected. Therefore, by paying attention to the deficiencies in these regions’ functions, it is possible to treat these diseases.
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Affiliation(s)
- Shekoufe Barahimi
- Department of Biomedical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Zahra Einalou
- Department of Biomedical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Mehrdad Dadgostar
- Department of Biomedical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
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21
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Sato M, Shoji Y, Morita K, Kato Y, Ishii Y, Nakano S, Uchimura N. Comparison of changes in the oxygenated hemoglobin level during a 'modified rock-paper-scissors task' between healthy subjects and patients with schizophrenia. Psychiatry Clin Neurosci 2018; 72:490-501. [PMID: 29582515 DOI: 10.1111/pcn.12653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 02/21/2018] [Accepted: 03/22/2018] [Indexed: 01/27/2023]
Abstract
AIM The purpose of this study, using single-event-related near-infrared spectroscopy (NIRS), was to examine the psychophysiological and social function assessment of 30 schizophrenic patients during a modified rock-paper-scissors task. METHODS We set up a screen in front of the subjects, on which pictures of hand-gestures for rock, paper, and scissors were randomly presented. Subjects were asked to give verbal answers under the conditions of win, lose, and draw, respectively. Using the 44-channel NIRS system, we evaluated the maximum amplitude of oxygenated hemoglobin, latency, and the area based on the arithmetic mean of resulting values after the task between 30 outpatients with schizophrenia and 30 healthy subjects, and analyzed the frontal pole area, dorsolateral prefrontal region, and parietal association area as regions of interest (ROI). RESULTS In schizophrenic patients, oxygenated hemoglobin changes (Δoxy-Hb) when losing the task showed a significantly lower level of Δoxy-Hb in ROI than controls. In addition, a significant positive correlation was observed between the Global Assessment of Functioning Scale and Δoxy-Hb in ROI, and a significant negative correlation was observed between the Negative Syndrome scale of the Positive and Negative Syndrome Scale and Δoxy-Hb in ROI. CONCLUSION From these results, we conclude that Δoxy-Hb levels when performing the modified rock-paper-scissors task assessed using NIRS may be a useful psychophysiological marker to evaluate the cognitive and social functions of schizophrenic patients.
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Affiliation(s)
- Mamoru Sato
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Yoshihisa Shoji
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Kiichiro Morita
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Yusuke Kato
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Youhei Ishii
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Shinya Nakano
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Naohisa Uchimura
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
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22
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Aizawa N, Ishibashi M, Nakamura Y, Uchiumi C, Makita K, Iwakiri M. Near-Infrared Spectroscopy Detects Prefrontal Activities During Rorschach Inkblot Method. JAPANESE PSYCHOLOGICAL RESEARCH 2018. [DOI: 10.1111/jpr.12195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Abstract
SummaryFunctional near-infrared spectroscopy (fNIRS) has been used in healthcare and medical research for the past two decades. In particular, the use of fNIRS in academic and clinical psychiatry has increased rapidly owing to its advantages over other neuroimaging modalities. fNIRS is a tool that can potentially supplement clinical interviews and mental state examinations to establish a psychiatric diagnosis and monitor treatment progress. This article provides a review of the theoretical background of fNIRS, key principles of its applications in psychiatry and its limitations, and shares a vision of its future applicability in psychiatric research and clinical practice.Learning Objectives• Understand the theoretical background, mechanism of action and clinical applications of fNIRS and compare it to other neuroimaging modalities• Understand the use of fNIRS in academic and clinical psychiatry through current research findings• Be able to evaluate the future potential of fNIRS and formulate new ideas for using fNIRS in academic and clinical psychiatry
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24
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Gundel F, von Spee J, Schneider S, Haeussinger FB, Hautzinger M, Erb M, Fallgatter AJ, Ehlis AC. Meditation and the brain - Neuronal correlates of mindfulness as assessed with near-infrared spectroscopy. Psychiatry Res Neuroimaging 2018; 271:24-33. [PMID: 28689600 DOI: 10.1016/j.pscychresns.2017.04.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 03/01/2017] [Accepted: 04/07/2017] [Indexed: 12/28/2022]
Abstract
Mindfulness meditation as a therapeutic intervention has been shown to have positive effects on psychological problems such as depression, pain or anxiety disorders. In this study, we used functional near-infrared spectroscopy (fNIRS) to detect differences in hemodynamic responses of meditation experts (14 participants) and a control group (16 participants) in a resting and a mindfulness condition. In both conditions, the sound of a meditation bowl was used to find group differences in the auditory system and adjacent cortical areas. Different lateralization patterns of the brain were found in expert meditators while being in a resting state (amplified left hemisphere) or being in mindfulness state (amplified right hemisphere). Compared to the control group, meditation experts had a more widespread pattern of activation in the auditory cortex, while resting. In the mindfulness condition, the control group showed a decrease of activation in higher auditory areas (BA 1, 6 and 40), whereas the meditation experts had a significant increase in those areas. In addition, meditation expert had highly activated brain areas (BA 39, 40, 44 and 45) beyond the meditative task itself, indicating possible long-term changes in the brain and their positive effects on empathy, meta cognitive skills and health.
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Affiliation(s)
- Friederike Gundel
- Department of Psychiatry and Psychotherapy, University of Tuebingen, Calwerstr. 14, 72076 Tuebingen, Germany.
| | - Johanna von Spee
- Department of Psychiatry and Psychotherapy, University of Tuebingen, Calwerstr. 14, 72076 Tuebingen, Germany
| | - Sabrina Schneider
- Department of Psychiatry and Psychotherapy, University of Tuebingen, Calwerstr. 14, 72076 Tuebingen, Germany
| | - Florian B Haeussinger
- Department of Psychiatry and Psychotherapy, University of Tuebingen, Calwerstr. 14, 72076 Tuebingen, Germany
| | - Martin Hautzinger
- Department of Psychology, University of Tuebingen, Schleichstr. 4, 72076 Tuebingen, Germany
| | - Michael Erb
- Department of Biomedical Magnetic Resonance, University of Tuebingen, Hoppe-Seyler-Str. 3, 72076 Tuebingen, Germany
| | - Andreas J Fallgatter
- Department of Psychiatry and Psychotherapy, University of Tuebingen, Calwerstr. 14, 72076 Tuebingen, Germany; LEAD Graduate School & Research Network, Gartenstraße 29, 72074 Tübingen, Germany; Centre for Integrative Neuroscience, Otfried-Müller-Str. 25, 72076 Tübingen, Germany
| | - Ann-Christine Ehlis
- Department of Psychiatry and Psychotherapy, University of Tuebingen, Calwerstr. 14, 72076 Tuebingen, Germany; LEAD Graduate School & Research Network, Gartenstraße 29, 72074 Tübingen, Germany
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Nakano S, Shoji Y, Morita K, Igimi H, Sato M, Ishii Y, Kondo A, Uchimura N. Comparison of changes in oxygenated hemoglobin during the tree-drawing task between patients with schizophrenia and healthy controls. Neuropsychiatr Dis Treat 2018; 14:1071-1082. [PMID: 29719398 PMCID: PMC5916263 DOI: 10.2147/ndt.s159984] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Tree-drawing test is used as a projective psychological test that expresses the abnormal internal experience in patients with schizophrenia (SZ). Despite the widely accepted view that the cognitive function is involved in characteristic tree-drawing in patients with SZ, no study has psychophysiologically examined it. The present study aimed to investigate the involvement of cognitive function during tree-drawing in patients with SZ. For that purpose, we evaluated the brain function in patients with SZ during a tree-drawing task by using near-infrared spectroscopy (NIRS) and compared them with those in healthy controls. PATIENTS AND METHODS The subjects were 28 healthy controls and 28 patients with SZ. Changes in the oxygenated hemoglobin ([oxy-Hb]) concentration in both the groups during the task of drawing a tree imagined freely (free-drawing task) and the task of copying an illustration of a tree (copying task) were measured by using NIRS. RESULTS Because of the difference between the task conditions, [oxy-Hb] levels in controls during the free-drawing task were higher than that during the copying task at the bilateral frontal pole regions and left inferior frontal region. Because of the difference between the groups, [oxy-Hb] levels at the left middle frontal region, bilateral inferior frontal regions, bilateral inferior parietal regions, and left superior temporal region during the free-drawing task in patients were lower than that in controls. CONCLUSION [oxy-Hb] during the tree-drawing task in patients with SZ was lower than that in healthy controls. Our results suggest that brain dysfunction in patients with SZ might be associated with their tree-drawing.
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Affiliation(s)
- Shinya Nakano
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan.,Department of Clinical Laboratory Medicine, Kurume University Hospital, Kurume, Japan
| | - Yoshihisa Shoji
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan.,Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan
| | - Kiichiro Morita
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan.,Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan
| | - Hiroyasu Igimi
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan.,Department of Neuropsychiatry, Horikawa Hospital, Medical Corporation Association Horikawakai, Kurume, Japan
| | - Mamoru Sato
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan.,Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan
| | - Youhei Ishii
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Akihiko Kondo
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Naohisa Uchimura
- Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan.,Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan
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26
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Pu S, Nakagome K, Itakura M, Ohtachi H, Iwata M, Nagata I, Kaneko K. Right Frontotemporal Cortex Mediates the Relationship between Cognitive Insight and Subjective Quality of Life in Patients with Schizophrenia. Front Psychiatry 2018; 9:16. [PMID: 29456514 PMCID: PMC5801421 DOI: 10.3389/fpsyt.2018.00016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 01/17/2018] [Indexed: 11/19/2022] Open
Abstract
Although prior studies identified a relationship between cognitive insight and subjective quality of life (QOL) in patients with schizophrenia, the brain regions mediating this relationship remain unknown. Recent studies have shown that the ventrolateral prefrontal cortex may be particularly important for cognitive insight in individuals with schizophrenia. Here, we examined whether frontotemporal function mediates the relationship between cognitive insight and QOL in 64 participants, including 32 patients with schizophrenia and 32 healthy controls. Cognitive insight was measured using the Beck Cognitive Insight Scale (BCIS), while participants' subjective QOL was assessed using the Medical Outcomes Study 36-item Short-form Health Survey. Frontotemporal function was evaluated during a verbal fluency task using multichannel near-infrared spectroscopy. Consistent with previous findings, we found that frontotemporal function was impaired in patients with schizophrenia. Interestingly, our data also revealed that the right ventrolateral PFC and the right anterior part of the temporal cortex significantly mediated the relationship between the self-reflectiveness (SR) subscale of the BCIS and subjective QOL. These findings suggest that cognitive insight, particularly SR, is associated with subjective QOL in patients with schizophrenia via right frontotemporal function. The findings of this study provide important insight into a QOL model of schizophrenia, which may guide the development of cost-effective interventions that target frontotemporal function in patients with schizophrenia.
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Affiliation(s)
- Shenghong Pu
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Faculty of Medicine, Tottori University, Yonago, Japan
| | | | - Masashi Itakura
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Hiroaki Ohtachi
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Masaaki Iwata
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Izumi Nagata
- National Hospital Organization, Tottori Medical Center, Tottori-shi, Japan
| | - Koichi Kaneko
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Faculty of Medicine, Tottori University, Yonago, Japan
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27
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Dinzeo TJ, Serna VC, Pujji SD, Sledjeski EM. The relationship of categorical and phonological verbal fluency to negative schizotypy and social functioning in a non-clinical sample. Cogn Neuropsychiatry 2018; 23:43-57. [PMID: 29258396 DOI: 10.1080/13546805.2017.1418307] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Research suggests that levels of schizotypy are related to cognitive and social functioning, with negative schizotypy being particularly related to deficits in verbal fluency (VF) and distinct social skills. Considering the possibility that different VF tasks may involve both shared and unique underlying processes, this study sought to examine the separate contributions of categorical and phonological forms of VF to social functioning in those with varying levels of negative schizotypy. METHODS Face-to-face interviews were conducted in which 228 college students completed VF tasks, the SPQ-BR, and a social functioning questionnaire. RESULTS Both phonological and categorical VF were inversely related to levels of negative schizotypy and inversely related to several social functioning domains. High and low levels of negative schizotypy groups were significantly different on elements of social engagement and interpersonal behaviour. In two instances, phonological VF appeared to moderate the relationships between negative schizotypy and specific elements of social functioning. CONCLUSIONS These findings support a general link between verbal processing and social functioning among those with greater negative schizotypy. Possible avenues of future research are discussed.
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Affiliation(s)
- Thomas J Dinzeo
- a Department of Psychology , Rowan University , Glassboro , NJ , USA
| | | | - Sherry D Pujji
- a Department of Psychology , Rowan University , Glassboro , NJ , USA
| | - Eve M Sledjeski
- a Department of Psychology , Rowan University , Glassboro , NJ , USA
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28
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Itakura M, Pu S, Ohdachi H, Matsumura H, Yokoyama K, Nagata I, Iwata M, Kaneko K. Association between social functioning and prefrontal cortex function during a verbal fluency task in schizophrenia: A near-infrared spectroscopic study. Psychiatry Clin Neurosci 2017; 71:769-779. [PMID: 28657683 DOI: 10.1111/pcn.12548] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 05/19/2017] [Accepted: 06/20/2017] [Indexed: 01/14/2023]
Abstract
AIM Impaired social functioning is a common characteristic of patients with schizophrenia. Social functioning requires the complex operation of various executive functions. Deficits in the prefrontal cortex (PFC) have been implicated in executive dysfunction. Here we aimed to clarify the relation between subjectively and objectively assessed social functioning, and their associations with PFC function in patients with schizophrenia. METHODS Twenty-three patients and 22 age- and sex-matched healthy controls (HC) were assessed. In the schizophrenia group, self- and caregiver-rated social functioning were measured using the Specific Level of Functioning Assessment (SLOF). The hemodynamic responses elicited by a verbal fluency task (VFT) in three regions of interest in the frontotemporal area were measured using multi-channel near-infrared spectroscopy (NIRS). We also investigated psychiatric symptoms, neurocognition, and cognitive insight to assess possible confounding factors. RESULTS Significant positive correlations were found between self- and caregiver-rated SLOF composite scores and three subdomain scores. Self- and caregiver-rated SLOF composite scores were significantly associated with dorsolateral PFC and frontopolar cortex (DLPFC/FPC) activation during the VFT. Psychiatric symptoms, global functioning, neurocognition, and cognitive insight were not associated with NIRS signals. General psychopathology was associated with NIRS signals in the ventrolateral PFC and the anterior temporal cortex. DLPFC and FPC activity may be associated with social functioning in patients with schizophrenia. CONCLUSION Our results suggest that the two distinct assessments of social functioning were significantly correlated. Moreover, DLPFC and FPC function was strongly associated with social functioning and the ability to carry out daily life in patients with schizophrenia.
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Affiliation(s)
- Masashi Itakura
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan.,Department of Psychiatry, Shimane Prefectural Psychiatric Medical Center, Izumo, Japan
| | - Shenghong Pu
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan
| | - Hiroaki Ohdachi
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan
| | - Hiroshi Matsumura
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan
| | - Katsutoshi Yokoyama
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan
| | - Izumi Nagata
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan
| | - Masaaki Iwata
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan
| | - Koichi Kaneko
- Division of Psychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, Yonago, Japan
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Yoshimura A, Goodson C, Johns JT, Towe MM, Irvine ES, Rendradjaja NA, Max LK, LaFlam A, Ledford EC, Probert J, Tieges Z, Edwin DH, MacLullich AMJ, Hogue CW, Lindquist MA, Gurakar A, Neufeld KJ, Kamiya A. Altered cortical brain activity in end stage liver disease assessed by multi-channel near-infrared spectroscopy: Associations with delirium. Sci Rep 2017; 7:9258. [PMID: 28835678 PMCID: PMC5569013 DOI: 10.1038/s41598-017-10024-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 08/02/2017] [Indexed: 01/16/2023] Open
Abstract
Delirium is a common and serious psychiatric syndrome caused by an underlying medical condition. It is associated with significant mortality and increased healthcare resource utilization. There are few biological markers of delirium, perhaps related to the etiologic heterogeneity of the syndrome. Functional near-infrared spectroscopy (fNIRS) is an optical topography system to measure changes in the concentration of oxygenated hemoglobin ([oxy-Hb]) in the cerebral cortex. We examined whether altered cortical brain activity in delirious patients with end stage liver disease (ESLD) is detected by fNIRS. We found that the [oxy-Hb] change during the verbal fluency task (VFT) was reduced in patients with ESLD compared with healthy controls (HC) in the prefrontal and bi-temporal regions. The [oxy-Hb] change during the sustained attention task (SAT) was elevated in patients with ESLD compared to HC in the prefrontal and left temporal regions. Notably, [oxy-Hb] change in the left dorsolateral prefrontal cortex during SAT showed a positive correlation with the severity of delirium. Our results suggest that [oxy-Hb] change in the prefrontal cortex during the sustained attention task measured with fNIRS might serve as a biological marker associated with delirium in ESLD patients.
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Affiliation(s)
- Atsushi Yoshimura
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Psychiatry, Shiga University of Medical Sciences, Otsu, Shiga, Japan
| | - Carrie Goodson
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jordan T Johns
- Department of Biostatistics, Johns Hopkins University School of Public Health, Baltimore, MD, USA
| | - Maxwell M Towe
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Esme S Irvine
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Nada A Rendradjaja
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Laura K Max
- Department of Anesthesiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Andrew LaFlam
- Department of Anesthesiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Emily C Ledford
- Department of Anesthesiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Julia Probert
- Department of Anesthesiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Zoë Tieges
- Geriatric Medicine, University of Edinburgh, Edinburgh, UK
| | - David H Edwin
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - Charles W Hogue
- Department of Anesthesiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Anesthesiology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Martin A Lindquist
- Department of Biostatistics, Johns Hopkins University School of Public Health, Baltimore, MD, USA
| | - Ahmet Gurakar
- Department of Medicine, Gastroenterology, and Hepatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Karin J Neufeld
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Atsushi Kamiya
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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30
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Reduced language lateralization in first episode schizophrenia: A near infrared spectroscopy study. Prog Neuropsychopharmacol Biol Psychiatry 2017; 78:96-104. [PMID: 28499897 DOI: 10.1016/j.pnpbp.2017.05.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 04/25/2017] [Accepted: 05/08/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND Diminished functional lateralization in language-related areas is found in chronic schizophrenia (SZ). However, whether this reduced lateralization exists at the early stage of SZ remains unclear. The present study aimed to investigate language lateralization in first episode schizophrenia (FES) using near infrared spectroscopy (NIRS) during a letter version of verbal fluency test (VFT). METHODS A total of 28 FES patients and 33 healthy controls (HCs) underwent NIRS while performing a VFT. Six regions of interests (ROIs) were defined: the bilateral frontal-, inferior frontal gyrus (IFG), and temporal regions. Laterality index (LI) was calculated and compared between the two groups in ROIs. In addition, we investigated whether language lateralization was correlated with severity of clinical symptoms. RESULTS Across all ROIs, LI was significantly reduced in FES patients (p=0.037) compared to controls in the IFG region. In addition, LI was not found to be correlated with VFT performance, the PANSS positive, negative or general psychopathology subscales. CONCLUSIONS Our study demonstrated a diminution of leftward functional lateralization in the IFG during a VFT in FES patients. This is the first NIRS study to report reduced functional lateralization in patients at the early stage of schizophrenia.
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31
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Kim HY, Seo K, Jeon HJ, Lee U, Lee H. Application of Functional Near-Infrared Spectroscopy to the Study of Brain Function in Humans and Animal Models. Mol Cells 2017; 40:523-532. [PMID: 28835022 PMCID: PMC5582298 DOI: 10.14348/molcells.2017.0153] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 08/03/2017] [Indexed: 01/26/2023] Open
Abstract
Functional near-infrared spectroscopy (fNIRS) is a noninvasive optical imaging technique that indirectly assesses neuronal activity by measuring changes in oxygenated and deoxygenated hemoglobin in tissues using near-infrared light. fNIRS has been used not only to investigate cortical activity in healthy human subjects and animals but also to reveal abnormalities in brain function in patients suffering from neurological and psychiatric disorders and in animals that exhibit disease conditions. Because of its safety, quietness, resistance to motion artifacts, and portability, fNIRS has become a tool to complement conventional imaging techniques in measuring hemodynamic responses while a subject performs diverse cognitive and behavioral tasks in test settings that are more ecologically relevant and involve social interaction. In this review, we introduce the basic principles of fNIRS and discuss the application of this technique in human and animal studies.
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Affiliation(s)
- Hak Yeong Kim
- Department of Brain and Cognitive Sciences, DGIST, Daegu 42988,
Korea
| | - Kain Seo
- Department of Brain and Cognitive Sciences, DGIST, Daegu 42988,
Korea
| | - Hong Jin Jeon
- Department of Psychiatry, Depression Center, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Seoul 06351,
Korea
| | - Unjoo Lee
- Department of Electronic Engineering, Hallym University, Kangwon 24252,
Korea
| | - Hyosang Lee
- Department of Brain and Cognitive Sciences, DGIST, Daegu 42988,
Korea
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32
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Schudlo LC, Chau T. Development and testing an online near-infrared spectroscopy brain-computer interface tailored to an individual with severe congenital motor impairments. Disabil Rehabil Assist Technol 2017; 13:581-591. [PMID: 28758809 DOI: 10.1080/17483107.2017.1357212] [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] [Indexed: 12/11/2022]
Abstract
PURPOSE For non-verbal individuals, brain-computer interfaces (BCIs) are a potential means of communication. Near-infrared spectroscopy (NIRS) is a brain-monitoring modality that has been considered for BCIs. To date, limited NIRS-BCI testing has involved online classification, particularly with individuals with severe motor impairments. MATERIALS AND METHODS We tested an online NIRS-BCI developed for a non-verbal individual with severe congenital motor impairments. The binary BCI differentiated categorical verbal fluency task (VFT) performance and rest using prefrontal measurements. The participant attended five sessions, the last two of which were online with classification feedback. RESULTS An online classification accuracy of 63.33% was achieved using a linear discriminant classifier trained on a four-dimensional feature set. An offline, cross-validation analysis of all data yielded an optimal adjusted classification accuracy of 66.6 ± 9.11%. Inconsistent functional responses, contradictory effects of feedback, participant fatigue and motion artefacts were identified as challenges to online classification specific to this participant. CONCLUSIONS Results suggest potential in using an NIRS-BCI controlled by the VFT in instances of severe congenital impairments. Further testing with users with severe disabilities is necessary. Implications for Rehabilitation Brain-computer interfaces (BCIs) can provide a non-motor based means of communication for individuals with severe motor impairments. Near-infrared spectroscopy (NIRS) is a haemodynamic-based brain-imaging modality used in BCIs. To date, NIRS-BCIs have not been thoroughly tested with potential target users. This case study shows that NIRS-BCIs may offer a means of practical communication for individuals with severe congenital impairments and continued exploration is advisable.
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Affiliation(s)
- Larissa C Schudlo
- a Bloorview Research Institute , Holland Bloorview Kids Rehabilitation Hospital , Toronto , Canada.,b Institute of Biomaterials and Biomedical Engineering , University of Toronto , Toronto , Canada
| | - Tom Chau
- a Bloorview Research Institute , Holland Bloorview Kids Rehabilitation Hospital , Toronto , Canada.,b Institute of Biomaterials and Biomedical Engineering , University of Toronto , Toronto , Canada
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33
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Modulating phonemic fluency performance in healthy subjects with transcranial magnetic stimulation over the left or right lateral frontal cortex. Neuropsychologia 2017; 102:109-115. [DOI: 10.1016/j.neuropsychologia.2017.06.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 06/06/2017] [Accepted: 06/09/2017] [Indexed: 11/30/2022]
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34
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Kato Y, Shoji Y, Morita K, Inoue M, Ishii Y, Sato M, Yamashita Y, Okawa J, Uchimura N. Evaluation of changes in oxyhemoglobin during Shiritori task in elderly subjects including those with Alzheimer‧s disease. Psychogeriatrics 2017; 17:238-246. [PMID: 28130872 DOI: 10.1111/psyg.12226] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 07/23/2016] [Accepted: 08/19/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND In recent years, as the prevalence of Alzheimer‧s disease (AD) has increased rapidly, demand has increased for early detection and treatment. Therefore, discovery and treatment intervention at the mild cognitive impairment stage are important. Dysfunction of the working memory is known to be conspicuously present in AD patients or mild cognitive impairment subjects from an early stage. Near-infrared spectroscopy (NIRS) is a method to measure hemoglobin concentration changes during an activation task. In the present study, we evaluated the cognitive function of elderly subjects, including those with AD, by means of NIRS. METHODS The subjects were divided into three groups-the AD group, the intermediate group, and the healthy group (HG)-based on assement of dementia using the Hasegawa‧s Dementia Scale-Revised, Mini-Mental State Examination, and Clinical Dementia Rating. The intermediate group was divided into two groups-the high score group (HSMG) and the low score group (LSMG)-based on Hasegawa‧s Dementia Scale-Revised and Mini-Mental State Examination scores. In this study, during Shiritori tasks using single-event-related NIRS, we analyzed oxyhemoglobin changes in an area, the peak amplitude, and latency, and compared them among four groups: AD group, HSMG, LSMG, and HG. RESULT In the AD group, the area at left channel (Ch)9, 11, and 19, the area at right Ch22, and the peak ampulitude at left Ch11 and 19 and right Ch5,12, and 22 were significantly smaller than those in HSMG and HG. Furthermore, the latency of the AD group was significantly longer than that of HSMG and HG at all region of interests. However, no significant difference was observed between the AD group and LSMG. CONCLUSION These findings suggest that analysis of changes in oxyhemoglobin during Shiritori tasks may be a useful neuropsychological index for the early diagnosis of AD. Detailed studies will be conducted in LSMG to facilitate the early introduction of NIRS as a screening tool for cognitive impairment.
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Affiliation(s)
- Yusuke Kato
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Yoshihisa Shoji
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Kiichiro Morita
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Masayuki Inoue
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan
| | - Yohei Ishii
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan
| | - Mamoru Sato
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Yuuji Yamashita
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Junji Okawa
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
| | - Naohisa Uchimura
- Department of Neuropsychiatry, Kurume University School of Medicine, Kurume, Japan.,Cognitive and Molecular Research Institute of Brain Diseases, Kurume University, Kurume, Japan
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35
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Kumar V, Shivakumar V, Chhabra H, Bose A, Venkatasubramanian G, Gangadhar BN. Functional near infra-red spectroscopy (fNIRS) in schizophrenia: A review. Asian J Psychiatr 2017; 27:18-31. [PMID: 28558892 DOI: 10.1016/j.ajp.2017.02.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 02/02/2017] [Accepted: 02/12/2017] [Indexed: 01/14/2023]
Abstract
The research on the alterations in functional connectivity in schizophrenia has been facilitated by development of an array of functional neuroimaging techniques. Functional Near Infra Red Spectroscopy (fNIRS) is a novel diffuse optical neuromonitring method with its own advantages and limitations. The advantages of fNIRS have made it to be frequently used as a research tool by medical community in different settings. In fNIRS the property of haemoglobin to absorb near infrared light is used to measure brain activity. It provides the indirect measurement of the neuronal activity in the areas of interest. The advantage of fNIRS being less restrictive has made it to be used more commonly in the research of psychiatric disorders in general, schizophrenia in particular. The fNIRS studies on patients with schizophrenia have shown haemodynamic hypo activation primarily in the prefrontal cortex during various cognitive tasks. In this review, initially we have briefly explained the basic principles of fNIRS followed by detailed review of fNIRS findings in patients with schizophrenia.
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Affiliation(s)
- Vijay Kumar
- The Schizophrenia Clinic, Department of Psychiatry & Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore, India.
| | - Venkataram Shivakumar
- The Schizophrenia Clinic, Department of Psychiatry & Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Harleen Chhabra
- The Schizophrenia Clinic, Department of Psychiatry & Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Anushree Bose
- The Schizophrenia Clinic, Department of Psychiatry & Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Ganesan Venkatasubramanian
- The Schizophrenia Clinic, Department of Psychiatry & Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Bangalore N Gangadhar
- The Schizophrenia Clinic, Department of Psychiatry & Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore, India
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36
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Chen YT, Lin CH, Huang CH, Liang WM, Lane HY. PICK1 Genetic Variation and Cognitive Function in Patients with Schizophrenia. Sci Rep 2017; 7:1889. [PMID: 28507309 PMCID: PMC5432511 DOI: 10.1038/s41598-017-01975-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 04/04/2017] [Indexed: 11/09/2022] Open
Abstract
The gene of protein interacting with C kinase 1 alpha (PICK1) has been implicated in schizophrenia, nevertheless, conflicting results existed. However, its role in cognitive function remains unclear. Besides, cognitive deficits impair the long-term outcome. We explored whether the polymorphisms of PICK1 (rs2076369, rs3952) affected cognitive functions in schizophrenic patients. We analyzed 302 patients and tested the differences of cognitive functions, clinical symptoms between genetic groups. We also used general linear model to analyze the effect of PICK1 genetic polymorphisms on cognitive functions. After adjustment for gender, age, education, the patients with rs2076369 G/T genotype showed better performance than T/T homozygotes in the summary score, global composite score, neurocognitive composite score, category fluency subtest, WAIS-III-Digit Symbol Coding subtest, working memory, WMS-III-Spatial Span (backward) subtest, MSCEIT-managing emotions branch (p = 0.038, 0.025, 0.046, 0.036, 0.025, 0.027, 0.035, 0.028, respectively). G/G homozygotes performed better than T/T in category fluency subtest (p = 0.049). A/A homozygotes of rs3952 performed better than G/G in trail making A subtest (p = 0.048). To our knowledge, this is the first study to indicate that PICK1 polymorphisms may associate with cognitive functions in schizophrenic patients. Further replication studies in healthy controls or other ethnic groups are warranted.
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Affiliation(s)
- Yi-Ting Chen
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Psychiatry & Brain Disease Research Center, China Medical University Hospital, Taichung, Taiwan
| | - Chieh-Hsin Lin
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Psychiatry, Chang Gung Memorial Hospital, Kaohsiung, Taiwan.,Center for General Education, Cheng Shiu University, Kaohsiung, Taiwan
| | - Chiung-Hsien Huang
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Psychiatry & Brain Disease Research Center, China Medical University Hospital, Taichung, Taiwan
| | - Wen-Miin Liang
- Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan
| | - Hsien-Yuan Lane
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan. .,Department of Psychiatry & Brain Disease Research Center, China Medical University Hospital, Taichung, Taiwan.
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37
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Sun JJ, Liu XM, Shen CY, Zhang XQ, Sun GX, Feng K, Xu B, Ren XJ, Ma XY, Liu PZ. Reduced prefrontal activation during verbal fluency task in chronic insomnia disorder: a multichannel near-infrared spectroscopy study. Neuropsychiatr Dis Treat 2017; 13:1723-1731. [PMID: 28721053 PMCID: PMC5501642 DOI: 10.2147/ndt.s136774] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
PURPOSE Daytime complaints such as memory and attention deficits and failure to accomplish daily tasks are common in insomnia patients. However, objective psychological tests to detect cognitive impairment are equivocal. Neural function associated with cognitive performance may explain the discrepancy. The aim of this study was to investigate the hemodynamic response patterns of patients with chronic insomnia disorder (CID) using the noninvasive and low-cost functional neuroimaging technique of multichannel near-infrared spectroscopy (NIRS) in order to identify changes of neural function associated with cognitive performance. PATIENTS AND METHODS Twenty-four CID patients and twenty-five healthy controls matched for age, right-hand dominance, educational level, and gender were examined during verbal fluency tasks (VFT) using NIRS. A covariance analysis was conducted to analyze differences of oxygenated hemoglobin (oxy-Hb) changes in prefrontal cortex (PFC) between the two groups and reduce the influence of the severity of depression. Pearson correlation coeffcients were calculated to examine the relationship between the oxy-Hb changes, with the severity of insomnia and depressive symptoms assessed by the Pittsburgh Sleep Quality Index (PSQI) and the Hamilton Rating Scale for Depression (HAMD). RESULTS The number of words generated during the VFT in CID groups showed no statistical differences with healthy controls. CID patients showed hypoactivation in the PFC during the cognitive task. In addition, we found that the function of left orbitofrontal cortex (OFC) during the VFT was significantly negatively correlated with the PSQI scores and the function of right dorsolateral PFC (DLPFC) was significantly negatively correlated with the HAMD scores. CONCLUSION The present study detected dysfunctions in PFC in spite of intact performance which indicates the role of PFC in the neurophysiological underpinnings. Left OFC function is associated with insomnia symptoms and right DLPFC function is associated with depressive symptoms.
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Affiliation(s)
- Jing-Jing Sun
- Medical Center, Tsinghua University, Beijing, China.,Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Xiao-Min Liu
- Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Chen-Yu Shen
- Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Xiao-Qian Zhang
- Medical Center, Tsinghua University, Beijing, China.,Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Gao-Xiang Sun
- Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Kun Feng
- Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Bo Xu
- Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Xia-Jin Ren
- Medical Center, Tsinghua University, Beijing, China.,Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Xiang-Yun Ma
- Medical Center, Tsinghua University, Beijing, China.,Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
| | - Po-Zi Liu
- Department of Psychiatry, YuQuan Hospital, Tsinghua University, Beijing, China
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38
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Metzger FG, Schopp B, Haeussinger FB, Dehnen K, Synofzik M, Fallgatter AJ, Ehlis AC. Brain activation in frontotemporal and Alzheimer's dementia: a functional near-infrared spectroscopy study. ALZHEIMERS RESEARCH & THERAPY 2016; 8:56. [PMID: 27931245 PMCID: PMC5146884 DOI: 10.1186/s13195-016-0224-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 11/16/2016] [Indexed: 12/12/2022]
Abstract
Background Frontotemporal dementia is an increasingly studied disease, the underlying functional impairments on a neurobiological level of which have not been fully understood. Patients with the behavioral-subtype frontotemporal dementia (bvFTD) are particularly challenging for clinical measurements such as functional imaging due to their behavioral symptoms. Here, an alternative imaging method, functional near-infrared spectroscopy (fNIRS), is introduced to measure task-related cortical brain activation based on blood oxygenation. The current study investigated differences in cortical activation patterns of patients with bvFTD, Alzheimer’s dementia (AD), and healthy elderly subjects measured by fNIRS. Method Eight probable bvFTD patients completed the semantic, phonological, and control conditions of a verbal fluency task. Eight AD patients and eight healthy controls were compared on the same task. Simultaneously, an fNIRS measurement was conducted and analyzed using a correction method based on the expected negative correlation between oxygenated and deoxygenated hemoglobin. Results Healthy controls show an increase in cortical activation measured in frontoparietal areas such as the dorsolateral prefrontal cortex. The activation pattern of patients with AD is similar, but weaker. In contrast, bvFTD patients show a more frontopolar pattern, with activation of Broca’s area, instead of the dorsolateral prefrontal cortex and the superior temporal gyrus. The frontoparietal compensation mechanisms, seen in the healthy elderly, were missing in bvFTD patients. Conclusion Different frontoparietal cortical activation patterns may indicate a correlate of diverse pathophysiological mechanisms of AD and bvFTD during verbal fluency processing. The AD pattern is weaker and more similar to the healthy pattern, whereas the bvFTD pattern is qualitatively different, namely more frontopolar and without frontoparietal compensation activation. It adheres to a change of cortical activation during the course of the disease. Electronic supplementary material The online version of this article (doi:10.1186/s13195-016-0224-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Florian G Metzger
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076, Tuebingen, Germany. .,Geriatric Center at the University Hospital of Tuebingen, Calwerstraße 14, 72076, Tuebingen, Germany.
| | - Betti Schopp
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076, Tuebingen, Germany
| | - Florian B Haeussinger
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076, Tuebingen, Germany
| | - Katja Dehnen
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076, Tuebingen, Germany
| | - Matthis Synofzik
- Center of Neurology, Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University Hospital of Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tuebingen, Germany.,German Center of Neurodegenerative Disorders (DZNE), University Hospital of Tuebingen, Otfried-Müller-Straße 23, 72076, Tuebingen, Germany
| | - Andreas J Fallgatter
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076, Tuebingen, Germany.,German Center of Neurodegenerative Disorders (DZNE), University Hospital of Tuebingen, Otfried-Müller-Straße 23, 72076, Tuebingen, Germany
| | - Ann-Christine Ehlis
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076, Tuebingen, Germany
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39
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Mubarik A, Tohid H. Frontal lobe alterations in schizophrenia: a review. TRENDS IN PSYCHIATRY AND PSYCHOTHERAPY 2016; 38:198-206. [DOI: 10.1590/2237-6089-2015-0088] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 05/20/2016] [Indexed: 12/16/2022]
Abstract
Abstract Objective: To highlight the changes in the frontal lobe of the human brain in people with schizophrenia. Methods: This was a qualitative review of the literature. Results: Many schizophrenic patients exhibit functional, structural, and metabolic abnormalities in the frontal lobe. Some patients have few or no alterations, while some have more functional and structural changes than others. Magnetic resonance imaging (MRI) shows structural and functional changes in volume, gray matter, white matter, and functional activity in the frontal lobe, but the mechanisms underlying these changes are not yet fully understood. Conclusion: When schizophrenia is studied as an essential topic in the field of neuropsychiatry, neuroscientists find that the frontal lobe is the most commonly involved area of the human brain. A clear picture of how this lobe is affected in schizophrenia is still lacking. We therefore recommend that further research be conducted to improve understanding of the pathophysiology of this psychiatric dilemma.
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Metzger FG, Ehlis AC, Haeussinger FB, Schneeweiss P, Hudak J, Fallgatter AJ, Schneider S. Functional brain imaging of walking while talking - An fNIRS study. Neuroscience 2016; 343:85-93. [PMID: 27915210 DOI: 10.1016/j.neuroscience.2016.11.032] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 11/02/2016] [Accepted: 11/21/2016] [Indexed: 11/24/2022]
Abstract
Since functional imaging of whole body movements is not feasible with functional magnetic resonance imaging (fMRI), the present study presents in vivo functional near-infrared spectroscopy (fNIRS) as a suitable technique to measure body movement effects on fronto-temporo-parietal cortical activation in single- and dual-task paradigms. Previous fNIRS applications in studies addressing whole body movements were typically limited to the assessment of prefrontal brain areas. The current study investigated brain activation in the frontal, temporal and parietal cortex of both hemispheres using functional near-infrared spectroscopy (fNIRS) with two large 4×4 probe-sets with 24 channels each during single and dual gait tasks. 12 young healthy adults were measured using fNIRS walking on a treadmill: the participants performed two single-task (ST) paradigms (walking at different speeds, i.e. 3 and 5km/h) and a dual task (DT) paradigm where a verbal fluency task (VFT) had to be executed while walking at 3km/h. The results show an increase of activation in Broca's area during the more advanced conditions (ST 5km/h vs. ST 3km/h, DT vs. ST 3km/h, DT vs. 5km/h), while the corresponding area on the right hemisphere was also activated. DT paradigms including a cognitive task in conjunction with whole body movements elicit wide-spread cortical activation patterns across fronto-temporo-parietal areas. An elaborate assessment of these activation patterns requires more extensive fNIRS assessments than the traditional prefrontal investigations, e.g. as performed with portable fNIRS devices.
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Affiliation(s)
- Florian G Metzger
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076 Tuebingen, Germany; Geriatric Center, University Hospital of Tuebingen, Calwerstraße 14, 72076 Tuebingen, Germany.
| | - Ann-Christine Ehlis
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076 Tuebingen, Germany.
| | - Florian B Haeussinger
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076 Tuebingen, Germany.
| | - Patrick Schneeweiss
- Department of Sports Medicine, University Hospital of Tuebingen, Hoppe-Seyler-Straße 6, 72076 Tübingen, Germany.
| | - Justin Hudak
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076 Tuebingen, Germany.
| | - Andreas J Fallgatter
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076 Tuebingen, Germany; Center of Integrative Neuroscience (CIN), Cluster of Excellence, University of Tuebingen, Otfried-Müller-Straße 25, 72076 Tübingen, Germany.
| | - Sabrina Schneider
- Department of Psychiatry and Psychotherapy, University Hospital of Tuebingen, Calwerstraße 14, 72076 Tuebingen, Germany; Department of Psychology, HELP University Kuala Lumpur, Persiaran Cakerawala, Subang Bestari, Seksyen U4, 40150 Shah Alam, Selangor, Malaysia.
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41
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Pu S, Nakagome K, Miura A, Iwata M, Nagata I, Kaneko K. Associations between depressive symptoms and fronto-temporal activities during a verbal fluency task in patients with schizophrenia. Sci Rep 2016; 6:30685. [PMID: 27465466 PMCID: PMC4964328 DOI: 10.1038/srep30685] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 07/08/2016] [Indexed: 11/21/2022] Open
Abstract
Though depressive symptoms are common in patients with schizophrenia, they are often left untreated and are associated with a high relapse rate, suicidal ideation, increased mortality, reduced social adjustment, and poor quality of life. The present study aims to elucidate the association between depressive symptoms and fronto-temporal activities during a cognitive task in patients with schizophrenia. The fronto-temporal activities of 41 Japanese patients with schizophrenia was evaluated during a verbal fluency task using 52-channel near-infrared spectroscopy (NIRS). Depressive symptoms were assessed using the depression/anxiety component of the Positive and Negative Syndrome Scale (PANSS) five-factor model. The depression/anxiety component of the PANSS five-factor model was negatively correlated with activities of the ventrolateral prefrontal cortex (PFC), right dorsolateral PFC, and left temporal regions. Our findings suggest that reduced fronto-temporal activities on NIRS during a verbal fluency task is related to depressive symptom severity in patients with schizophrenia.
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Affiliation(s)
- Shenghong Pu
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Kazuyuki Nakagome
- National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, Japan
| | - Akihiko Miura
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Masaaki Iwata
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Izumi Nagata
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Koichi Kaneko
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
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42
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Yeung MK, Sze SL, Woo J, Kwok T, Shum DHK, Yu R, Chan AS. Altered Frontal Lateralization Underlies the Category Fluency Deficits in Older Adults with Mild Cognitive Impairment: A Near-Infrared Spectroscopy Study. Front Aging Neurosci 2016; 8:59. [PMID: 27065857 PMCID: PMC4809883 DOI: 10.3389/fnagi.2016.00059] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 03/09/2016] [Indexed: 11/15/2022] Open
Abstract
Individuals with mild cognitive impairment (MCI) have been consistently found to have category fluency deficits. However, little is known about the neural basis of these deficits. A diversity of neuroimaging studies has revealed left-lateralized prefrontal activations due to verbal processing and control functions during the performance of category fluency tasks. Given the reports of structural and functional abnormalities in the prefrontal cortices in individuals with MCI, it is conceivable that these individuals would also exhibit altered prefrontal activation patterns during a category fluency task. The present study aimed to investigate the prefrontal dynamics during the category fluency task in older adults with MCI by using near-infrared spectroscopy (NIRS). Twenty-six older adults with MCI were compared with 26 older adults with normal cognition (NC) who were matched in age, gender, handedness, and educational level. All participants performed a category fluency task while the prefrontal dynamics were recorded. The results showed that the MCI group generated fewer unique words, made fewer switches between subcategories, and generated fewer new subcategories than did the NC group. Importantly, the NIRS results showed that the NC group exhibited a left lateralization of frontal activations during the category fluency task, while the MCI group did not exhibit such a lateralization. Furthermore, there was a significant positive correlation between the category fluency performance and the extent of lateralization, suggesting that the category fluency deficits in the MCI group could be related to frontal dysfunction. That is, the rightward shift of frontal activations in the MCI group may reflect the presence of cortical reorganization in which the contralateral regions (i.e., the right hemisphere) are recruited to take over the function that is declining in the specialized regions (i.e., the left hemisphere). Our lateralization finding may serve as an objective neural marker for distinguishing between normal aging and MCI. Our study highlights that an alteration of neural functioning is already present at the prodromal stage of dementia.
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Affiliation(s)
- Michael K Yeung
- Department of Psychology, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - Sophia L Sze
- Department of Psychology, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China; Chanwuyi Research Center for Neuropsychological Well-Being, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China
| | - Jean Woo
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - Timothy Kwok
- School of Public Health, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - David H K Shum
- Menzies Health Institute Queensland and School of Applied Psychology, Griffith University Gold Coast, QLD, Australia
| | - Ruby Yu
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - Agnes S Chan
- Department of Psychology, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China; Chanwuyi Research Center for Neuropsychological Well-Being, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China
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43
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Task-dependent and polarity-specific effects of prefrontal transcranial direct current stimulation on cortical activation during word fluency. Neuroimage 2015; 140:134-40. [PMID: 26748077 DOI: 10.1016/j.neuroimage.2015.12.047] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 12/17/2015] [Accepted: 12/28/2015] [Indexed: 11/23/2022] Open
Abstract
Targeted modulation of cortical functions by non-invasive brain stimulation is widely used for the investigation of the neurophysiological signatures of executive functions and put forward as a potential specific treatment for its disorders. To further investigate the underlying mechanisms, we performed two experiments involving 46 subjects that performed a semantic and a phonological verbal fluency task (VFT) as well as a simple speech-production task after application of 1mA anodal or cathodal transcranial direct current stimulation (tDCS) to the left inferior frontal gyrus (IFG). Brain activation was measured by functional near-infrared spectroscopy (fNIRS) during task performance. Neither preceding anodal nor cathodal tDCS was found to modulate VFT performance of either difficulty. However, preconditioning with anodal tDCS increased brain activity during the VFT whereas a trendwise decrease of activation was found after cathodal stimulation. Notably, this difference was not found with simple speech production. These findings support the notion of a polarity-specific malleability of neuronal network activity underlying speech production by tDCS. Most importantly, the task-specificity of the modulatory effect observed after the end of stimulation demonstrates lasting neurophysiological effects of tDCS that are reflected in modifications of cortical excitability by challenging cognitive tasks.
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44
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Chou PH, Lin WH, Lin CC, Hou PH, Li WR, Hung CC, Lin CP, Lan TH, Chan CH. Duration of Untreated Psychosis and Brain Function during Verbal Fluency Testing in First-Episode Schizophrenia: A Near-Infrared Spectroscopy Study. Sci Rep 2015; 5:18069. [PMID: 26656662 PMCID: PMC4674798 DOI: 10.1038/srep18069] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 11/09/2015] [Indexed: 01/17/2023] Open
Abstract
A longer duration of untreated psychosis (DUP) has been associated with poor clinical outcomes in patients with schizophrenia (SZ); however, it remains unclear whether this is due to neurotoxic effects of psychosis. The purpose of this study was to use near-infrared spectroscopy (NIRS) to investigate the influence of DUP on brain function using two verbal fluency tests (VFTs) in patients with first-episode SZ (FES). A total of 28 FES patients and 29 healthy controls (HC) underwent NIRS during VFTs. Group comparisons of cortical activity were made using two-tailed t-tests and the false discovery rate method. We then examined the associations between DUP and hemodynamic changes in each channel to identify any effects of DUP on brain cortical activity. During the letter VFT, the HC group exhibited significantly greater cortical activations over bilateral frontotemporal regions compared to FES patients. However, this distinction was not observed while performing a category version of the VFT. In addition, no associations between DUP and brain cortical activity were observed in the FES group during either VFT. In conclusion, we did not find an association between DUP and frontotemporal cortical activities. This might be because neurodevelopmental disturbances result in neurocognitive deficits long before psychotic symptoms onset.
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Affiliation(s)
- Po-Han Chou
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Wei-Hao Lin
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chih-Chien Lin
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Po-Hsun Hou
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Social Work and Child Welfare, Providence University, Taichung, Taiwan
| | - Wan-Rung Li
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chia-Chun Hung
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan.,Brain Connectivity Lab, Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan.,Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
| | - Ching-Po Lin
- Department of Social Work and Child Welfare, Providence University, Taichung, Taiwan.,Brain Connectivity Lab, Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan
| | - Tsuo-Hung Lan
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Psychiatry, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chin-Hong Chan
- Department of Psychiatry, Conde S. Januário General Hospital, Macau, China
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45
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Pu S, Nakagome K, Itakura M, Yamanashi T, Sugie T, Miura A, Satake T, Iwata M, Nagata I, Kaneko K. Self-reported social functioning and prefrontal hemodynamic responses during a cognitive task in schizophrenia. Psychiatry Res 2015; 234:121-9. [PMID: 26382107 DOI: 10.1016/j.pscychresns.2015.09.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 08/10/2015] [Accepted: 09/02/2015] [Indexed: 10/23/2022]
Abstract
Impaired social functioning is a characteristic of schizophrenia that affects patients' quality of life. The aim of the study was to assess prefrontal hemodynamic responses during a cognitive task and establish its influence on psychiatric symptoms, cognitive function, global functioning, and self-reported social functioning in patients with schizophrenia. Thirty-three patients with schizophrenia and 30 age-and sex-matched healthy controls participated in the study. We measured hemodynamic responses in the prefrontal and superior temporal cortical surface areas with 52-channel near-infrared spectroscopy (NIRS) during a verbal fluency task (VFT). Self-reported social functioning was assessed using the Social Functioning Scale (SFS). Regional hemodynamic responses were significantly smaller in the prefrontal and temporal regions in subjects with schizophrenia than in the controls, and prefrontal hemodynamic responses during the VFT showed a strong correlation with SFS total scores. These results suggest an association between self-reported social functioning and prefrontal activation in subjects with schizophrenia. The present study provides evidence that NIRS imaging could be helpful in understanding the neural basis of social functioning.
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Affiliation(s)
- Shenghong Pu
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan.
| | - Kazuyuki Nakagome
- National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo 187-8551, Japan
| | - Masashi Itakura
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Takehiko Yamanashi
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Takuya Sugie
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Akehiko Miura
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Takahiro Satake
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Masaaki Iwata
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Izumi Nagata
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
| | - Koichi Kaneko
- Division of Neuropsychiatry, Department of Brain and Neuroscience, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan
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46
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C Schudlo L, Chau T. Towards a ternary NIRS-BCI: single-trial classification of verbal fluency task, Stroop task and unconstrained rest. J Neural Eng 2015; 12:066008. [PMID: 26447770 DOI: 10.1088/1741-2560/12/6/066008] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The majority of near-infrared spectroscopy (NIRS) brain-computer interface (BCI) studies have investigated binary classification problems. Limited work has considered differentiation of more than two mental states, or multi-class differentiation of higher-level cognitive tasks using measurements outside of the anterior prefrontal cortex. Improvements in accuracies are needed to deliver effective communication with a multi-class NIRS system. We investigated the feasibility of a ternary NIRS-BCI that supports mental states corresponding to verbal fluency task (VFT) performance, Stroop task performance, and unconstrained rest using prefrontal and parietal measurements. APPROACH Prefrontal and parietal NIRS signals were acquired from 11 able-bodied adults during rest and performance of the VFT or Stroop task. Classification was performed offline using bagging with a linear discriminant base classifier trained on a 10 dimensional feature set. MAIN RESULTS VFT, Stroop task and rest were classified at an average accuracy of 71.7% ± 7.9%. The ternary classification system provided a statistically significant improvement in information transfer rate relative to a binary system controlled by either mental task (0.87 ± 0.35 bits/min versus 0.73 ± 0.24 bits/min). SIGNIFICANCE These results suggest that effective communication can be achieved with a ternary NIRS-BCI that supports VFT, Stroop task and rest via measurements from the frontal and parietal cortices. Further development of such a system is warranted. Accurate ternary classification can enhance communication rates offered by NIRS-BCIs, improving the practicality of this technology.
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Affiliation(s)
- Larissa C Schudlo
- Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, 150 Kilgour Road, Toronto, Ontario, M4G 1R8, Canada. Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario, M5S 3G9, Canada
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47
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Holper L, Aleksandrowicz A, Müller M, Ajdacic-Gross V, Haker H, Fallgatter AJ, Hagenmuller F, Rössler W, Kawohl W. Brain correlates of verbal fluency in subthreshold psychosis assessed by functional near-infrared spectroscopy. Schizophr Res 2015; 168:23-9. [PMID: 26277535 DOI: 10.1016/j.schres.2015.07.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 07/22/2015] [Accepted: 07/23/2015] [Indexed: 11/26/2022]
Abstract
The prevalence of subthreshold psychotic symptoms in the general population has gained increasing interest as a possible precursor of psychotic disorders. The goal of the present study was to evaluate whether neurobiological features of subthreshold psychotic symptoms can be detected using verbal fluency tasks and functional near-infrared spectroscopy (fNIRS). A large data set was obtained from the Zurich Program for Sustainable Development of Mental Health Services (ZInEP). Based on the SCL-90-R subscales 'Paranoid Ideation' and 'Psychoticism' a total sample of 188 subjects was assigned to four groups with different levels of subthreshold psychotic symptoms. All subjects completed a phonemic and semantic verbal fluency task while fNIRS was recorded over the prefrontal and temporal cortices. Results revealed larger hemodynamic (oxy-hemoglobin) responses to the phonemic and semantic conditions compared to the control condition over prefrontal and temporal cortices. Subjects with high subthreshold psychotic symptoms exhibited significantly reduced hemodynamic responses in both conditions compared to the control group. Further, connectivity between prefrontal and temporal cortices revealed significantly weaker patterns in subjects with high subthreshold psychotic symptoms compared to the control group, possibly indicating less incisive network connections associated with subthreshold psychotic symptoms. The present findings provide evidence that subthreshold forms of psychotic symptoms are associated with reduced hemodynamic responses and connectivity in prefrontal and temporal cortices during verbal fluency that can be identified using fNIRS.
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Affiliation(s)
- L Holper
- Department of Psychiatry, Psychotherapy, and Psychosomatics, University Hospital of Psychiatry Zurich, Switzerland.
| | - A Aleksandrowicz
- Department of Psychiatry, Psychotherapy, and Psychosomatics, University Hospital of Psychiatry Zurich, Switzerland; The Zurich Program for Sustainable Development of Mental Health Services, University Hospital of Psychiatry Zurich, Switzerland
| | - M Müller
- Department of Psychiatry, Psychotherapy, and Psychosomatics, University Hospital of Psychiatry Zurich, Switzerland; The Zurich Program for Sustainable Development of Mental Health Services, University Hospital of Psychiatry Zurich, Switzerland
| | - V Ajdacic-Gross
- Department of Psychiatry, Psychotherapy, and Psychosomatics, University Hospital of Psychiatry Zurich, Switzerland; The Zurich Program for Sustainable Development of Mental Health Services, University Hospital of Psychiatry Zurich, Switzerland
| | - H Haker
- The Zurich Program for Sustainable Development of Mental Health Services, University Hospital of Psychiatry Zurich, Switzerland; Translational Neuromodeling Unit, Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Switzerland
| | - A J Fallgatter
- Department of Psychiatry Psychotherapy, University of Tübingen, Germany; LEAD Graduate School, University of Tübingen, Germany
| | - F Hagenmuller
- Department of Psychiatry, Psychotherapy, and Psychosomatics, University Hospital of Psychiatry Zurich, Switzerland; The Zurich Program for Sustainable Development of Mental Health Services, University Hospital of Psychiatry Zurich, Switzerland
| | - W Rössler
- Department of Psychiatry, Psychotherapy, and Psychosomatics, University Hospital of Psychiatry Zurich, Switzerland; The Zurich Program for Sustainable Development of Mental Health Services, University Hospital of Psychiatry Zurich, Switzerland; Institute of Psychiatry, Laboratory of Neuroscience, LIM27, University of Sao Paulo, Brazil
| | - W Kawohl
- Department of Psychiatry, Psychotherapy, and Psychosomatics, University Hospital of Psychiatry Zurich, Switzerland; The Zurich Program for Sustainable Development of Mental Health Services, University Hospital of Psychiatry Zurich, Switzerland
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48
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Kinoshita A, Takizawa R, Koike S, Satomura Y, Kawasaki S, Kawakubo Y, Marumo K, Tochigi M, Sasaki T, Nishimura Y, Kasai K. Effect of metabotropic glutamate receptor-3 variants on prefrontal brain activity in schizophrenia: An imaging genetics study using multi-channel near-infrared spectroscopy. Prog Neuropsychopharmacol Biol Psychiatry 2015; 62:14-21. [PMID: 25914064 DOI: 10.1016/j.pnpbp.2015.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 04/16/2015] [Accepted: 04/16/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND The glutamatergic system is essential for learning and memory through its crucial role in neural development and synaptic plasticity. Genes associated with the glutamatergic system, including metabotropic glutamate receptor (mGluR or GRM) genes, have been implicated in the pathophysiology of schizophrenia. Few studies, however, have investigated a relationship between polymorphism of glutamate-related genes and cortical function in vivo in patients with schizophrenia. We thus explored an association between genetic variations in GRM3 and brain activation driven by a cognitive task in the prefrontal cortex in patients with schizophrenia. MATERIALS AND METHODS Thirty-one outpatients with schizophrenia and 48 healthy controls participated in this study. We measured four candidate single nucleotide polymorphisms (rs274622, rs2299225, rs1468412, and rs6465084) of GRM3, and activity in the prefrontal and temporal cortices during a category version of a verbal fluency task, using a 52-channel near-infrared spectroscopy instrument. RESULTS AND DISCUSSION The rs274622 C carriers with schizophrenia were associated with significantly smaller prefrontal activation than patients with TT genotype. This between-genotype difference tended to be confined to the patient group. GRM3 polymorphisms are associated with prefrontal activation during cognitive task in schizophrenia.
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Affiliation(s)
- Akihide Kinoshita
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Ryu Takizawa
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan; MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London SE5 8AF, UK
| | - Shinsuke Koike
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan; Office for Mental Health Support, Division for Counseling and Support, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoshihiro Satomura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Shingo Kawasaki
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan; Application Development Office, Hitachi Medical Corporation, Kashiwa City, Chiba 277-0804, Japan
| | - Yuki Kawakubo
- Department of Child Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Kohei Marumo
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Mamoru Tochigi
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan; Department of Psychiatry, Teikyo University School of Medicine, Itabashi-ku, Tokyo 173-8605, Japan
| | - Tsukasa Sasaki
- Department of Physical and Health Education, Graduate School of Education, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yukika Nishimura
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Kiyoto Kasai
- Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan.
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Dlabac-de Lange JJ, Liemburg EJ, Bais L, Renken RJ, Knegtering H, Aleman A. Effect of rTMS on brain activation in schizophrenia with negative symptoms: A proof-of-principle study. Schizophr Res 2015; 168:475-82. [PMID: 26187147 DOI: 10.1016/j.schres.2015.06.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 06/03/2015] [Accepted: 06/21/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Prefrontal cortical dysfunction is frequently reported in schizophrenia and is thought to underlie negative symptoms of schizophrenia. Repetitive Transcranial Magnetic Stimulation (rTMS) can modulate neuronal activity and has been shown to improve negative symptoms in patients with schizophrenia, but the underlying neural mechanism is unknown. OBJECTIVE To examine whether 3weeks of 10Hz rTMS treatment of the bilateral dorsolateral prefrontal cortex (DLPFC) would improve frontal brain activation in patients with negative symptoms of schizophrenia, as measured by functional magnetic resonance imaging (fMRI) during the Tower of London (ToL) task. METHODS 24 patients with the diagnosis of schizophrenia with moderate to severe negative symptoms (Positive and Negative Syndrome Scale (PANSS) negative subscale≥15) participated. Patients were randomized to a 3-week (15day) course of active or sham rTMS. All patients performed the ToL task during fMRI scanning both pre-treatment and post-treatment. Differences in brain activation between the two groups were compared non-parametrically. RESULTS After rTMS treatment, brain activity in the active group increased in the right DLPFC and the right medial frontal gyrus as compared to the sham group. In addition, the groups significantly differed with regard to activation change in the left posterior cingulate, with decreased activation in the active and increased activation in the sham group. CONCLUSIONS Treatment with rTMS over the DLPFC may have the potential for increasing task-related activation in frontal areas in patients with schizophrenia. Effects of different rTMS parameters and fMRI tasks targeting relevant brain circuitry deserve further investigation. TRIAL REGISTRATION Nederlands Trial Register, registration number: NTR1261.
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Affiliation(s)
- Jozarni J Dlabac-de Lange
- University of Groningen, University Medical Center Groningen, Department of Psychiatry, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, Rob Giel Research Center, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, Department of Neuroscience and BCN Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands.
| | - Edith J Liemburg
- University of Groningen, University Medical Center Groningen, Department of Neuroscience and BCN Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands
| | - Leonie Bais
- University of Groningen, University Medical Center Groningen, Department of Neuroscience and BCN Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands; Lentis Psychiatric Institute, Lentis Research, Hereweg 80, 9725 AG Groningen, The Netherlands
| | - Remco J Renken
- University of Groningen, University Medical Center Groningen, Department of Neuroscience and BCN Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands
| | - Henderikus Knegtering
- University of Groningen, University Medical Center Groningen, Department of Psychiatry, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, Rob Giel Research Center, Hanzeplein 1, 9713 GZ Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, Department of Neuroscience and BCN Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands; Lentis Psychiatric Institute, Lentis Research, Hereweg 80, 9725 AG Groningen, The Netherlands
| | - André Aleman
- University of Groningen, University Medical Center Groningen, Department of Neuroscience and BCN Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, Department of Psychology, Grote Kruisstraat 2/1, 9712 TS Groningen, The Netherlands
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Hunt AM, Legge AW. Neurological Research on Music Therapy for Mental Health: A Summary of Imaging and Research Methods. ACTA ACUST UNITED AC 2015. [DOI: 10.1093/mtp/miv024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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