Article
Clinical Neurology
Anastasia Pavlidou, Petra V. Viher, Hanta Bachofner, Florian Weiss, Katharina Stegmayer, Stewart A. Shankman, Vijay A. Mittal, Sebastian Walther
Summary: Depressed patients exhibit impaired gesture performance, which is highly correlated with working memory abilities, but not with gestural knowledge, psychomotor retardation, depression severity, or frontal dysfunction.
JOURNAL OF AFFECTIVE DISORDERS
(2021)
Article
Chemistry, Analytical
Yahui Wang, Yueyang Wang, Jingzhou Chen, Yincheng Wang, Jie Yang, Ting Jiang, Jibo He
Summary: The study found that using the hand-up posture with word-gesture text entry technology in the virtual environment resulted in better input performance, and the VR experience had minimal impact on input performance. Moreover, perceived exertion to complete text input was relatively high.
Article
Mathematics, Interdisciplinary Applications
Kun Wu, Shan Zhang, Tianqi Wu
Summary: This article discusses the reinterpretation and construction of concepts related to self-organization theory, explores various forms of organization and disorganization and their relationships, and presents a conceptual system diagram consisting of four levels.
Article
Multidisciplinary Sciences
Shiqi Wang, Kankan Wang, Tingping Yang, Yiming Li, Di Fan
Summary: This paper proposes an improved 3D-ResNet sign language recognition algorithm with enhanced hand features, aiming to improve the accuracy of sign language recognition. The algorithm detects the hand regions using the improved EfficientDet network and enhances the detection ability with dual channel and spatial attention modules. Additionally, an improved residual module is used to extract sign language features. Experimental results show that the proposed algorithm achieves higher recognition accuracy compared to other algorithms.
SCIENTIFIC REPORTS
(2022)
Article
Computer Science, Artificial Intelligence
Wee How Khoh, Ying Han Pang, Andrew Beng Jin Teoh, Shih Yin Ooi
Summary: Transfer learning in hand gesture-based signature classification shows robustness against forgery attacks, achieving high precision and recall rates, with low error rates in random and skilled forgery attacks.
APPLIED SOFT COMPUTING
(2021)
Article
Psychiatry
Anastasia Pavlidou, Geoffrey Gorisse, Domna Banakou, Sebastian Walther
Summary: This study aims to use virtual reality as an alternative tool to objectively measure gesture performance accuracy in schizophrenia patients. Participants will be immersed in a virtual environment and their hand movements will be tracked in real-time to record and analyze gesture performance. The results may contribute to the gesture literature and offer new possibilities for therapeutic interventions using virtual reality technologies.
FRONTIERS IN PSYCHIATRY
(2023)
Article
Computer Science, Artificial Intelligence
Derek W. Orbaugh Antillon, Christopher R. Walker, Samuel Rosset, Iain A. Anderson
Summary: A smart dive glove has been developed to recognize 13 hand gestures used in diving communication. Different classification algorithms were trained and evaluated, showing good performance in a dry environment but decreasing underwater, especially when divers need to focus on other tasks.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Chemistry, Multidisciplinary
Ngoc-Hoang Nguyen, Tran-Dac-Thinh Phan, Soo-Hyung Kim, Hyung-Jeong Yang, Guee-Sang Lee
Summary: This paper introduces a novel approach to continuous dynamic hand gesture recognition, utilizing two main modules: gesture spotting and gesture classification. By combining different data channels and conducting experiments on multiple public datasets, the approach shows promising performance improvements in gesture recognition.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Huilong Xie, Wenwei Song, Wenxiong Kang
Summary: This article proposes a novel multiscale behavior analysis network (MSBA-Net) for random hand gesture authentication. It can extract both short-term and long-term behavioral features, and solves the semantic misalignment issue caused by hand motion, improving model performance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Clinical Neurology
Fanbin Gu, Jingyuan Fan, Chengfeng Cai, Zhaoyang Wang, Xiaolin Liu, Jiantao Yang, Qingtang Zhu
Summary: The study demonstrates a helpful tool for detecting abnormal gestures in radial, ulnar, or median nerve injuries with satisfactory accuracy, sensitivity, and specificity. Hand pose estimation can automatically analyze and detect abnormalities from images of these patients, potentially serving as a simple and convenient screening method for primary healthcare and telemedicine application.
FRONTIERS IN NEUROLOGY
(2022)
Article
Psychiatry
Annarita Barone, Michele De Prisco, Benedetta Altavilla, Camilla Avagliano, Raffaele Balletta, Elisabetta Filomena Buonaguro, Mariateresa Ciccarelli, Luigi D'Ambrosio, Sara Giordano, Gianmarco Latte, Marta Matrone, Federica Milandri, Danilo Notar Francesco, Licia Vellucci, Andrea de Bartolomeis
Summary: This study used a machine learning approach to explore the relationship between Treatment Resistant Schizophrenia (TRS) and the five-factor model of the Positive and Negative Syndrome Scale (PANSS). Through the random forest algorithm, it was found that patients with higher scores in disorganization, positive, and excitement symptoms were more likely to be classified as TRS. A multivariate logistic regression model further confirmed that only the disorganization factor was significantly associated with TRS.
JOURNAL OF PSYCHIATRIC RESEARCH
(2022)
Article
Psychology, Multidisciplinary
Omid Khatin-Zadeh, Danyal Farsani, Jiehui Hu, Mirko Farina, Hassan Banaruee, Fernando Marmolejo-Ramos
Summary: This study examines the embodiment of hope through metaphors, specifically focusing on hand, head, and eyebrow gestures. Participants were asked to discuss their hopes in an interview, and the results showed that forward hand gestures, rightward head gestures, and upward eyebrow gestures were commonly used when talking about future hopes. The findings suggest that hope is metaphorically embodied in different parts of the body, with the future aspect represented by a forward hand gesture and the positive emotional aspect associated with hope represented by rightward head gestures or upward eyebrow gestures.
FRONTIERS IN PSYCHOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Wenwei Song, Wenxiong Kang, Yufeng Zhang
Summary: We propose a physiological-behavioral characteristic understanding network (PB-Net) for hand gesture authentication, which can extract stable physiological and behavioral features. The PB-Net uses data-tailoring strategies to produce customized videos for physiological and behavioral branches, removing redundant information and improving efficiency. An adaptive physiological-behavioral feature fusion module is devised to assign appropriate weights and merge the features for identity recognition.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Multidisciplinary
Yin-Lin Chen, Wen-Jyi Hwang, Tsung-Ming Tai, Po-Sheng Cheng
Summary: This study presents a novel neural network architecture for sensor-based gesture detection and recognition. The proposed algorithm accurately detects and classifies a sequence of hand gestures, providing an effective alternative for applications where accurate detection and classification of hand gestures by simple networks are desired.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Electrical & Electronic
Francesco Santoni, Alessio De Angelis, Antonio Moschitta, Paolo Carbone
Summary: This article introduces a hand-tracking system based on magnetic positioning, which can detect the position and orientation of the hand using magnetic fields and calculate finger joint positions and hand positions using a kinematic model. The system can work in non-line-of-sight conditions and has potential for various applications.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Neurosciences
Florian Wuethrich, Stephanie Lefebvre, Niluja Nadesalingam, Jessica A. Bernard, Vijay A. Mittal, Stewart A. Shankman, Sebastian Walther
Summary: This study demonstrated the reliability of a finger-tapping fMRI task in healthy participants across two sessions. The task showed good spatial overlap and fair reliability of amplitudes on the group level. The findings support the use of task-based fMRI analysis for identifying activated regions and comparing between groups.
EUROPEAN JOURNAL OF NEUROSCIENCE
(2023)
Editorial Material
Clinical Neurology
Sebastian Walther, Florian Weiss
Summary: For decades, catatonia was considered a subtype of schizophrenia. However, changes in psychiatric training and the use of antipsychotics led to a decrease in its recognition. The new status in ICD-11 is expected to improve the teaching, recognition, and treatment of catatonia in the future.
FORTSCHRITTE DER NEUROLOGIE PSYCHIATRIE
(2023)
Article
Psychiatry
Niluja Nadesalingam, Stephanie Lefebvre, Danai Alexaki, Daniel Baumann Gama, Florian Wuthrich, Alexandra Kyrou, Hassen Kerkeni, Roger Kalla, Sebastian Walther
Summary: In this study, using the RDoC framework, the researchers compared motor behavior, self-report, and physiology between patients with psychomotor slowing (PS) in schizophrenia, patients without PS, and healthy controls. The results showed that patients with PS had slower gait, lower activity levels, and slower finger movements compared to controls. Actigraphy and observer ratings were found to be effective in distinguishing PS patients from non-PS patients.
SCHIZOPHRENIA BULLETIN
(2023)
Article
Psychiatry
Tobias Bracht, Sebastian Walther, Sigrid Breit, Nicolas Mertse, Andrea Federspiel, Agnes Meyer, Leila M. Soravia, Roland Wiest, Niklaus Denier
Summary: Electroconvulsive therapy (ECT) is an effective treatment for depression, but it is unclear if the neuroplastic changes it induces are associated with treatment response. This study compared neuroplasticity between ECT-patients, TAU-responders (patients who responded to treatment as usual), and healthy controls, and found that ECT led to enlargements in hippocampal and amygdalar volumes and increased cerebral blood flow in the hippocampi, while TAU-responders exhibited increased cortical thickness.
TRANSLATIONAL PSYCHIATRY
(2023)
Article
Biochemistry & Molecular Biology
Suheyla Cetin-Karayumak, Amanda E. E. Lyall, Maria A. A. Di Biase, Johanna Seitz-Holland, Fan Zhang, Sinead Kelly, Doron Elad, Godfrey Pearlson, Carol A. A. Tamminga, John A. A. Sweeney, Brett A. A. Clementz, David Schretlen, Katharina Stegmayer, Sebastian Walther, Jungsun Lee, Tim Crow, Anthony James, Aristotle Voineskos, Robert W. W. Buchanan, Philip R. R. Szeszko, Anil K. K. Malhotra, Matcheri Keshavan, Martha E. E. Shenton, Yogesh Rathi, Ofer Pasternak, Marek Kubicki
Summary: Studies using Free Water Imaging have consistently found increased extracellular free water in individuals with early psychosis, but the time course of these elevations and their relationship with illness duration have not been extensively studied. Our multi-site analysis of diffusion magnetic resonance imaging scans from individuals with schizophrenia at different illness stages and ages reveals that average whole brain free water is higher in individuals with schizophrenia across all ages, with the greatest values observed in early adulthood. Additionally, free water is negatively associated with illness duration.
MOLECULAR PSYCHIATRY
(2023)
Article
Psychiatry
Lydia Maderthaner, Anastasia Pavlidou, Stephanie Lefebvre, Niluja Nadesalingam, Victoria Chapellier, Sofie von Kanel, Alexandra Kyrou, Danai Alexaki, Florian Wuthrich, Florian Weiss, Daniel Baumann-Gama, Roland Wiest, Werner Strik, Tilo Kircher, Sebastian Walther
Summary: This study investigated the neural correlates of formal thought disorder (FTD) in patients with schizophrenia spectrum disorders using 3T magnetic resonance imaging. The results showed distinct neural patterns for different dimensions of FTD, suggesting the need for specific treatment strategies and further mechanistic investigations on single-item levels.
SCHIZOPHRENIA BULLETIN
(2023)
Article
Psychiatry
Anastasia Pavlidou, Geoffrey Gorisse, Domna Banakou, Sebastian Walther
Summary: This study aims to use virtual reality as an alternative tool to objectively measure gesture performance accuracy in schizophrenia patients. Participants will be immersed in a virtual environment and their hand movements will be tracked in real-time to record and analyze gesture performance. The results may contribute to the gesture literature and offer new possibilities for therapeutic interventions using virtual reality technologies.
FRONTIERS IN PSYCHIATRY
(2023)
Article
Biochemistry & Molecular Biology
Igor Nenadic, Tina Meller, Ulrika Evermann, Julia-Katharina Pfarr, Andrea Federspiel, Sebastian Walther, Sarah Grezellschak, Ahmad Abu-Akel
Summary: Psychiatric disorders have high co-morbidity, including subclinical expressions of psychopathology. Traits associated with autism and schizophrenia were found to be related to changes in the structure and function of the hippocampus, particularly when there is interaction between different phenotype facets. These findings provide empirical evidence for considering the synergistic impact of different disease spectra on biological parameters in psychiatry.
MOLECULAR PSYCHIATRY
(2023)
Article
Psychiatry
Matthias Liebrand, Michael Rebsamen, Akari Nakamura-Utsunomiya, Luisa von den Driesch, Patrick Kock, Julien Caccia, Christoph Hamann, Roland Wiest, Michael Kaess, Sebastian Walther, Sibylle Tschumi, Takeshi Y. Y. Hiyama, Jochen Kindler
Summary: This is the first report of a patient with adipsic hypernatremia, a rare autoimmune encephalitis, presenting with complex psychiatric symptomatology. The patient exhibited psychosis, catatonia, and a range of behavioral abnormalities. This case provides evidence for a causal link between adipsic hypernatremia and the development of a psychotic disorder, as well as highlighting a new form of autoimmune psychosis.
FRONTIERS IN PSYCHIATRY
(2023)
Article
Neuroimaging
Niklaus Denier, Sebastian Walther, Sigrid Breit, Nicolas Mertse, Andrea Federspiel, Agnes Meyer, Leila M. Soravia, Meret Wallimann, Roland Wiest, Tobias Bracht
Summary: This study investigates the effects of electroconvulsive therapy (ECT) on the structure and function of the hippocampus, hippocampal pathways, and the default mode network (DMN) in patients with depression. The findings suggest that ECT induces changes in the structure and function of the hippocampus and DMN, which may contribute to clinical response in patients with depression.
NEUROIMAGE-CLINICAL
(2023)
Article
Psychiatry
Nicole Gangl, Frauke Conring, Andrea Federspiel, Roland Wiest, Sebastian Walther, Katharina Stegmayer
Summary: Negative symptoms are a core component of schizophrenia and have a significant impact on community functioning and quality of life. This study investigated the neural correlates of negative symptoms using arterial spin labeling to measure resting-state cerebral blood flow. The results revealed specific brain regions associated with different negative symptom factors, highlighting the importance of motor areas for expression deficits and providing insights into the underlying pathophysiological pathways.
Meeting Abstract
Neurosciences
Sebastian Walther, Niluja Nadesalingam, Stephanie Lefebvre
BIOLOGICAL PSYCHIATRY
(2023)
Meeting Abstract
Neurosciences
Florian Wuthrich, Stephanie Lefebvre, Tilo Kircher, Nina Alexander, Benjamin Straube, Igor Nenadic, Andreas Jansen, Frederike Stein, Katharina Brosch, Adrian Wroblewski, Ulrika Evermann, Florian Thomas-Odenthal, Paula Usemann, Stewart A. Shankman, Vijay A. Mittal, Sebastian Walther
BIOLOGICAL PSYCHIATRY
(2023)
Meeting Abstract
Neurosciences
Katherine Damme, Teresa Vargas, Sebastian Walther, Stewart Shankman, Vijay Mittal
BIOLOGICAL PSYCHIATRY
(2023)
Article
Pharmacology & Pharmacy
Sigrid Breit, Agnes Meyer, Wolfgang Schmitt, Tobias Bracht, Sebastian Walther
Summary: ECT has been proven to be highly effective in the treatment of catatonia, achieving response rates of about 80 to 100%. This retrospective study analyzed data from 20 patients with catatonia who underwent ECT from 2008 to 2021. The results showed excellent response to ECT, particularly for motor inhibition symptoms such as stupor and mutism. The presence of grasp reflex was identified as a predictor of late response.
PHARMACOPSYCHIATRY
(2023)