1
|
Manten K, Katzenschlager S, Brümmer LE, Schmitz S, Gaeddert M, Erdmann C, Grilli M, Pollock NR, Macé A, Erkosar B, Carmona S, Ongarello S, Johnson CC, Sacks JA, Faehling V, Bornemann L, Weigand MA, Denkinger CM, Yerlikaya S. Clinical accuracy of instrument-based SARS-CoV-2 antigen diagnostic tests: a systematic review and meta-analysis. Virol J 2024; 21:99. [PMID: 38685117 PMCID: PMC11059670 DOI: 10.1186/s12985-024-02371-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 04/17/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND During the COVID-19 pandemic, antigen diagnostic tests were frequently used for screening, triage, and diagnosis. Novel instrument-based antigen tests (iAg tests) hold the promise of outperforming their instrument-free, visually-read counterparts. Here, we provide a systematic review and meta-analysis of the SARS-CoV-2 iAg tests' clinical accuracy. METHODS We systematically searched MEDLINE (via PubMed), Web of Science, medRxiv, and bioRxiv for articles published before November 7th, 2022, evaluating the accuracy of iAg tests for SARS-CoV-2 detection. We performed a random effects meta-analysis to estimate sensitivity and specificity and used the QUADAS-2 tool to assess study quality and risk of bias. Sub-group analysis was conducted based on Ct value range, IFU-conformity, age, symptom presence and duration, and the variant of concern. RESULTS We screened the titles and abstracts of 20,431 articles and included 114 publications that fulfilled the inclusion criteria. Additionally, we incorporated three articles sourced from the FIND website, totaling 117 studies encompassing 95,181 individuals, which evaluated the clinical accuracy of 24 commercial COVID-19 iAg tests. The studies varied in risk of bias but showed high applicability. Of 24 iAg tests from 99 studies assessed in the meta-analysis, the pooled sensitivity and specificity compared to molecular testing of a paired NP swab sample were 76.7% (95% CI 73.5 to 79.7) and 98.4% (95% CI 98.0 to 98.7), respectively. Higher sensitivity was noted in individuals with high viral load (99.6% [95% CI 96.8 to 100] at Ct-level ≤ 20) and within the first week of symptom onset (84.6% [95% CI 78.2 to 89.3]), but did not differ between tests conducted as per manufacturer's instructions and those conducted differently, or between point-of-care and lab-based testing. CONCLUSION Overall, iAg tests have a high pooled specificity but a moderate pooled sensitivity, according to our analysis. The pooled sensitivity increases with lower Ct-values (a proxy for viral load), or within the first week of symptom onset, enabling reliable identification of most COVID-19 cases and highlighting the importance of context in test selection. The study underscores the need for careful evaluation considering performance variations and operational features of iAg tests.
Collapse
Affiliation(s)
- Katharina Manten
- Department of Infectious Disease and Tropical Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Stephan Katzenschlager
- Department of Infectious Disease and Tropical Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
| | - Lukas E Brümmer
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Stephani Schmitz
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
- Department of Developmental Biology, Erasmus Medical Center, Rotterdam, Netherlands
| | - Mary Gaeddert
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Maurizio Grilli
- Library, University Medical Center Mannheim, Mannheim, Germany
| | - Nira R Pollock
- Department of Laboratory Medicine, Boston Children's Hospital, Boston, MA, USA
| | | | | | | | | | - Cheryl C Johnson
- Global HIV, Hepatitis and STIs Programmes, World Health Organization, Geneva, Switzerland
| | - Jilian A Sacks
- Department of Epidemic and Pandemic Preparedness and Prevention, World Health Organization, Geneva, Switzerland
| | - Verena Faehling
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Linus Bornemann
- Institute of Virology, Faculty of Medicine, University Medical Centre, University of Freiburg, Freiburg, Germany
| | - Markus A Weigand
- Department of Infectious Disease and Tropical Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
| | - Claudia M Denkinger
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
- German Center for Infection Research (DZIF), partner site Heidelberg University Hospital, Heidelberg, Germany
| | - Seda Yerlikaya
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany.
- German Center for Infection Research (DZIF), partner site Heidelberg University Hospital, Heidelberg, Germany.
| |
Collapse
|
2
|
Katzenschlager S, Brümmer LE, Schmitz S, Tolle H, Manten K, Gaeddert M, Erdmann C, Lindner A, Tobian F, Grilli M, Pollock NR, Macé A, Erkosar B, Carmona S, Ongarello S, Johnson CC, Sacks JA, Denkinger CM, Yerlikaya S. Comparing SARS-CoV-2 antigen-detection rapid diagnostic tests for COVID-19 self-testing/self-sampling with molecular and professional-use tests: a systematic review and meta-analysis. Sci Rep 2023; 13:21913. [PMID: 38081881 PMCID: PMC10713601 DOI: 10.1038/s41598-023-48892-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023] Open
Abstract
Self-testing is an effective tool to bridge the testing gap for several infectious diseases; however, its performance in detecting SARS-CoV-2 using antigen-detection rapid diagnostic tests (Ag-RDTs) has not been systematically reviewed. This study aimed to inform WHO guidelines by evaluating the accuracy of COVID-19 self-testing and self-sampling coupled with professional Ag-RDT conduct and interpretation. Articles on this topic were searched until November 7th, 2022. Concordance between self-testing/self-sampling and fully professional-use Ag-RDTs was assessed using Cohen's kappa. Bivariate meta-analysis yielded pooled performance estimates. Quality and certainty of evidence were evaluated using QUADAS-2 and GRADE tools. Among 43 studies included, twelve reported on self-testing, and 31 assessed self-sampling only. Around 49.6% showed low risk of bias. Overall concordance with professional-use Ag-RDTs was high (kappa 0.91 [95% confidence interval (CI) 0.88-0.94]). Comparing self-testing/self-sampling to molecular testing, the pooled sensitivity and specificity were 70.5% (95% CI 64.3-76.0) and 99.4% (95% CI 99.1-99.6), respectively. Higher sensitivity (i.e., 93.6% [95% CI 90.4-96.8] for Ct < 25) was estimated in subgroups with higher viral loads using Ct values as a proxy. Despite high heterogeneity among studies, COVID-19 self-testing/self-sampling exhibits high concordance with professional-use Ag-RDTs. This suggests that self-testing/self-sampling can be offered as part of COVID-19 testing strategies.Trial registration: PROSPERO: CRD42021250706.
Collapse
Affiliation(s)
- Stephan Katzenschlager
- Department of Anesthesiology, Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Lukas E Brümmer
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
- German Center for Infection Research (DZIF), Partner Site Heidelberg University Hospital, Heidelberg, Germany
| | - Stephani Schmitz
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
- Department of Developmental Biology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Hannah Tolle
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
| | - Katharina Manten
- Department of Anesthesiology, Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
| | - Mary Gaeddert
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
| | | | - Andreas Lindner
- Charité Center for Global Health, Institute of International Health, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Frank Tobian
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
| | | | - Nira R Pollock
- Department of Laboratory Medicine, Boston Children's Hospital, Boston, MA, USA
| | | | | | | | | | - Cheryl C Johnson
- Global HIV, Hepatitis and STIs Programmes, World Health Organization, Geneva, Switzerland
| | - Jilian A Sacks
- Department of Epidemic and Pandemic Preparedness and Prevention, World Health Organization, Geneva, Switzerland
| | - Claudia M Denkinger
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany
- German Center for Infection Research (DZIF), Partner Site Heidelberg University Hospital, Heidelberg, Germany
| | - Seda Yerlikaya
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany.
| |
Collapse
|
3
|
Rodax L, Pfeiffer V, Erdmann C, Münte T, Nitschke M. P 14 Functional activation patterns in patients with essential tremor. Clin Neurophysiol 2022. [DOI: 10.1016/j.clinph.2022.01.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
4
|
Brümmer LE, Katzenschlager S, McGrath S, Schmitz S, Gaeddert M, Erdmann C, Bota M, Grilli M, Larmann J, Weigand MA, Pollock NR, Macé A, Erkosar B, Carmona S, Sacks JA, Ongarello S, Denkinger CM. Accuracy of rapid point-of-care antigen-based diagnostics for SARS-CoV-2: An updated systematic review and meta-analysis with meta-regression analyzing influencing factors. PLoS Med 2022; 19:e1004011. [PMID: 35617375 PMCID: PMC9187092 DOI: 10.1371/journal.pmed.1004011] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/10/2022] [Accepted: 05/04/2022] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Comprehensive information about the accuracy of antigen rapid diagnostic tests (Ag-RDTs) for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is essential to guide public health decision makers in choosing the best tests and testing policies. In August 2021, we published a systematic review and meta-analysis about the accuracy of Ag-RDTs. We now update this work and analyze the factors influencing test sensitivity in further detail. METHODS AND FINDINGS We registered the review on PROSPERO (registration number: CRD42020225140). We systematically searched preprint and peer-reviewed databases for publications evaluating the accuracy of Ag-RDTs for SARS-CoV-2 until August 31, 2021. Descriptive analyses of all studies were performed, and when more than 4 studies were available, a random-effects meta-analysis was used to estimate pooled sensitivity and specificity with reverse transcription polymerase chain reaction (RT-PCR) testing as a reference. To evaluate factors influencing test sensitivity, we performed 3 different analyses using multivariable mixed-effects meta-regression models. We included 194 studies with 221,878 Ag-RDTs performed. Overall, the pooled estimates of Ag-RDT sensitivity and specificity were 72.0% (95% confidence interval [CI] 69.8 to 74.2) and 98.9% (95% CI 98.6 to 99.1). When manufacturer instructions were followed, sensitivity increased to 76.3% (95% CI 73.7 to 78.7). Sensitivity was markedly better on samples with lower RT-PCR cycle threshold (Ct) values (97.9% [95% CI 96.9 to 98.9] and 90.6% [95% CI 88.3 to 93.0] for Ct-values <20 and <25, compared to 54.4% [95% CI 47.3 to 61.5] and 18.7% [95% CI 13.9 to 23.4] for Ct-values ≥25 and ≥30) and was estimated to increase by 2.9 percentage points (95% CI 1.7 to 4.0) for every unit decrease in mean Ct-value when adjusting for testing procedure and patients' symptom status. Concordantly, we found the mean Ct-value to be lower for true positive (22.2 [95% CI 21.5 to 22.8]) compared to false negative (30.4 [95% CI 29.7 to 31.1]) results. Testing in the first week from symptom onset resulted in substantially higher sensitivity (81.9% [95% CI 77.7 to 85.5]) compared to testing after 1 week (51.8%, 95% CI 41.5 to 61.9). Similarly, sensitivity was higher in symptomatic (76.2% [95% CI 73.3 to 78.9]) compared to asymptomatic (56.8% [95% CI 50.9 to 62.4]) persons. However, both effects were mainly driven by the Ct-value of the sample. With regards to sample type, highest sensitivity was found for nasopharyngeal (NP) and combined NP/oropharyngeal samples (70.8% [95% CI 68.3 to 73.2]), as well as in anterior nasal/mid-turbinate samples (77.3% [95% CI 73.0 to 81.0]). Our analysis was limited by the included studies' heterogeneity in viral load assessment and sample origination. CONCLUSIONS Ag-RDTs detect most of the individuals infected with SARS-CoV-2, and almost all (>90%) when high viral loads are present. With viral load, as estimated by Ct-value, being the most influential factor on their sensitivity, they are especially useful to detect persons with high viral load who are most likely to transmit the virus. To further quantify the effects of other factors influencing test sensitivity, standardization of clinical accuracy studies and access to patient level Ct-values and duration of symptoms are needed.
Collapse
Affiliation(s)
- Lukas E. Brümmer
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Sean McGrath
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Stephani Schmitz
- Department of Developmental Biology, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Mary Gaeddert
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Marc Bota
- Agaplesion Bethesda Hospital, Hamburg, Germany
| | - Maurizio Grilli
- Library, University Medical Center Mannheim, Mannheim, Germany
| | - Jan Larmann
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Markus A. Weigand
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Nira R. Pollock
- Department of Laboratory Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
| | | | | | | | | | | | - Claudia M. Denkinger
- Division of Infectious Disease and Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
- German Center for Infection Research (DZIF), partner site Heidelberg University Hospital, Heidelberg, Germany
| |
Collapse
|
5
|
Brümmer LE, Katzenschlager S, Gaeddert M, Erdmann C, Schmitz S, Bota M, Grilli M, Larmann J, Weigand MA, Pollock NR, Macé A, Carmona S, Ongarello S, Sacks JA, Denkinger CM. Accuracy of novel antigen rapid diagnostics for SARS-CoV-2: A living systematic review and meta-analysis. PLoS Med 2021; 18:e1003735. [PMID: 34383750 PMCID: PMC8389849 DOI: 10.1371/journal.pmed.1003735] [Citation(s) in RCA: 159] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 08/26/2021] [Accepted: 07/14/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND SARS-CoV-2 antigen rapid diagnostic tests (Ag-RDTs) are increasingly being integrated in testing strategies around the world. Studies of the Ag-RDTs have shown variable performance. In this systematic review and meta-analysis, we assessed the clinical accuracy (sensitivity and specificity) of commercially available Ag-RDTs. METHODS AND FINDINGS We registered the review on PROSPERO (registration number: CRD42020225140). We systematically searched multiple databases (PubMed, Web of Science Core Collection, medRvix, bioRvix, and FIND) for publications evaluating the accuracy of Ag-RDTs for SARS-CoV-2 up until 30 April 2021. Descriptive analyses of all studies were performed, and when more than 4 studies were available, a random-effects meta-analysis was used to estimate pooled sensitivity and specificity in comparison to reverse transcription polymerase chain reaction (RT-PCR) testing. We assessed heterogeneity by subgroup analyses, and rated study quality and risk of bias using the QUADAS-2 assessment tool. From a total of 14,254 articles, we included 133 analytical and clinical studies resulting in 214 clinical accuracy datasets with 112,323 samples. Across all meta-analyzed samples, the pooled Ag-RDT sensitivity and specificity were 71.2% (95% CI 68.2% to 74.0%) and 98.9% (95% CI 98.6% to 99.1%), respectively. Sensitivity increased to 76.3% (95% CI 73.1% to 79.2%) if analysis was restricted to studies that followed the Ag-RDT manufacturers' instructions. LumiraDx showed the highest sensitivity, with 88.2% (95% CI 59.0% to 97.5%). Of instrument-free Ag-RDTs, Standard Q nasal performed best, with 80.2% sensitivity (95% CI 70.3% to 87.4%). Across all Ag-RDTs, sensitivity was markedly better on samples with lower RT-PCR cycle threshold (Ct) values, i.e., <20 (96.5%, 95% CI 92.6% to 98.4%) and <25 (95.8%, 95% CI 92.3% to 97.8%), in comparison to those with Ct ≥ 25 (50.7%, 95% CI 35.6% to 65.8%) and ≥30 (20.9%, 95% CI 12.5% to 32.8%). Testing in the first week from symptom onset resulted in substantially higher sensitivity (83.8%, 95% CI 76.3% to 89.2%) compared to testing after 1 week (61.5%, 95% CI 52.2% to 70.0%). The best Ag-RDT sensitivity was found with anterior nasal sampling (75.5%, 95% CI 70.4% to 79.9%), in comparison to other sample types (e.g., nasopharyngeal, 71.6%, 95% CI 68.1% to 74.9%), although CIs were overlapping. Concerns of bias were raised across all datasets, and financial support from the manufacturer was reported in 24.1% of datasets. Our analysis was limited by the included studies' heterogeneity in design and reporting. CONCLUSIONS In this study we found that Ag-RDTs detect the vast majority of SARS-CoV-2-infected persons within the first week of symptom onset and those with high viral load. Thus, they can have high utility for diagnostic purposes in the early phase of disease, making them a valuable tool to fight the spread of SARS-CoV-2. Standardization in conduct and reporting of clinical accuracy studies would improve comparability and use of data.
Collapse
Affiliation(s)
- Lukas E. Brümmer
- Division of Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Mary Gaeddert
- Division of Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Stephani Schmitz
- Division of Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Marc Bota
- Agaplesion Bethesda Hospital, Hamburg, Germany
| | - Maurizio Grilli
- Library, University Medical Center Mannheim, Mannheim, Germany
| | - Jan Larmann
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Markus A. Weigand
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Nira R. Pollock
- Department of Laboratory Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
| | | | | | | | | | - Claudia M. Denkinger
- Division of Tropical Medicine, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
- Partner Site Heidelberg University Hospital, German Center for Infection Research (DZIF), Heidelberg, Germany
| |
Collapse
|
6
|
Adorjan K, Pogarell O, Streb D, Padberg F, Erdmann C, Koller G, Raabe F, Reich-Erkelenz D, de Jonge S, Neumeier K, Zill P, Jauch KW, Schulze TG, Falkai P. Role of psychiatric hospitals during a pandemic: introducing the Munich Psychiatric COVID-19 Pandemic Contingency Plan. BJPsych Open 2021; 7:e41. [PMID: 33517940 PMCID: PMC7853741 DOI: 10.1192/bjo.2020.167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Psychiatry is facing major challenges during the current coronavirus disease 2019 (COVID)-19 pandemic. These challenges involve its actual and perceived role within the medical system, in particular how psychiatric hospitals can maintain their core mission of attending to people with mental illness while at the same time providing relief to overstretched general medicine services. Although psychiatric disorders comprise the leading cause of the global burden of disease, mental healthcare has been deemphasised in the wake of the onslaught of the pandemic: to make room for emergency care, psychiatric wards have been downsized, clinics closed, psychiatric support systems discontinued and so on. To deal with this pressing issue, we developed a pandemic contingency plan with the aim to contain, decelerate and, preferably, avoid transmission of COVID-19 and to enable and maintain medical healthcare for patients with mental disorders. AIMS To describe our plan as an example of how a psychiatric hospital can share in providing acute care in a healthcare system facing an acute and highly infectious pandemic like COVID-19 and at the same time provide support for people with mental illness, with or without a COVID-19 infection. METHOD This was a descriptive study. RESULTS The plan was based on the German national pandemic strategy and several legal recommendations and was implemented step by step on the basis of the local COVID-19 situation. In addition, mid- and long-term plans were developed for coping with the aftermath of the pandemic. CONCLUSIONS The plan enabled the University Hospital to maintain medical healthcare for patients with mental disorders. It has offered the necessary flexibility to adapt its implementation to the first and second waves of the COVID-19 pandemic in Germany. The plan is designed to serve as an easily adaptable blueprint for psychiatric hospitals around the world.
Collapse
Affiliation(s)
- Kristina Adorjan
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany; Institute of Psychiatric Phenomics and Genomics (IPPG), University Hospital, LMU Munich, Germany; and Center for International Health (CIHLMU), University Hospital, LMU Munich, Germany
| | - Oliver Pogarell
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Dorothee Streb
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Frank Padberg
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Christian Erdmann
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Gabriele Koller
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Florian Raabe
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Daniela Reich-Erkelenz
- Institute of Psychiatric Phenomics and Genomics (IPPG), University Hospital, LMU Munich, Germany
| | - Sylvia de Jonge
- Department of Molecular Neurobiology at Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Karin Neumeier
- Institute of Psychiatric Phenomics and Genomics (IPPG), University Hospital, LMU Munich, Munich, Germany; and Department of Molecular Neurobiology at Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | - Peter Zill
- Department of Molecular Neurobiology at Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| | | | - Thomas G Schulze
- Institute of Psychiatric Phenomics and Genomics (IPPG), University Hospital, LMU Munich, Munich, Germany
| | - Peter Falkai
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Germany
| |
Collapse
|
7
|
Deckmann K, Rafiq A, Erdmann C, Illig C, Durschnabel M, Wess J, Weidner W, Bschleipfer T, Kummer W. Muscarinic receptors 2 and 5 regulate bitter response of urethral brush cells via negative feedback. FASEB J 2018; 32:2903-2910. [PMID: 29401598 DOI: 10.1096/fj.201700582r] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We have recently identified a cholinergic chemosensory cell in the urethral epithelium, urethral brush cell (UBC), that, upon stimulation with bitter or bacterial substances, initiates a reflex detrusor activation. Here, we elucidated cholinergic mechanisms that modulate UBC responsiveness. We analyzed muscarinic acetylcholine receptor (M1-5 mAChR) expression by using RT-PCR in UBCs, recorded [Ca2+]i responses to a bitter stimulus in isolated UBCs of wild-type and mAChR-deficient mice, and performed cystometry in all involved strains. The bitter response of UBCs was enhanced by global cholinergic and selective M2 inhibition, diminished by positive allosteric modulation of M5, and unaffected by M1, M3, and M4 mAChR inhibitors. This effect was not observed in M2 and M5 mAChR-deficient mice. In cystometry, M5 mAChR-deficient mice demonstrated signs of detrusor overactivity. In conclusion, M2 and M5 mAChRs attenuate the bitter response of UBC via a cholinergic negative autocrine feedback mechanism. Cystometry suggests that dysfunction, particularly of the M5 receptor, may lead to such symptoms as bladder overactivity.-Deckmann, K., Rafiq, A., Erdmann, C., Illig, C., Durschnabel, M., Wess, J., Weidner, W., Bschleipfer, T., Kummer, W. Muscarinic receptors 2 and 5 regulate bitter response of urethral brush cells via negative feedback.
Collapse
Affiliation(s)
- Klaus Deckmann
- Institute for Anatomy and Cell Biology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Amir Rafiq
- Institute for Anatomy and Cell Biology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Christian Erdmann
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Christian Illig
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Melanie Durschnabel
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Jürgen Wess
- Molecular Signaling Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Wolfgang Weidner
- Department of Urology, Pediatric Urology, and Andrology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Thomas Bschleipfer
- Clinic of Urology, Andrology, and Pediatric Urology, Weiden Hospital/Clinics of Nordoberpfalz AG, Weiden, Germany
| | - Wolfgang Kummer
- Institute for Anatomy and Cell Biology, Justus-Liebig-University Giessen, Giessen, Germany
| |
Collapse
|
8
|
König V. Borstel U, Erdmann C, Maier M, Garlipp F. Relationship between health problems and husbandry, use and management of horses: An analysis based on health insured horses. J Vet Behav 2016. [DOI: 10.1016/j.jveb.2016.08.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
9
|
König v. Borstel U, Erdmann C, Maier M, Garlipp F. Relationships between owner-reported behavior problems and husbandry; use and management of horses. J Vet Behav 2016. [DOI: 10.1016/j.jveb.2016.08.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Wissel T, Stüber P, Wagner B, Bruder R, Erdmann C, Deutz CS, Sack B, Manit J, Schweikard A, Ernst F. Enhanced Optical Head Tracking for Cranial Radiation Therapy: Supporting Surface Registration by Cutaneous Structures. Int J Radiat Oncol Biol Phys 2016; 95:810-7. [PMID: 27020107 DOI: 10.1016/j.ijrobp.2016.01.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 12/21/2015] [Accepted: 01/20/2016] [Indexed: 10/22/2022]
Abstract
PURPOSE To support surface registration in cranial radiation therapy by structural information. The risk for spatial ambiguities is minimized by using tissue thickness variations predicted from backscattered near-infrared (NIR) light from the forehead. METHODS AND MATERIALS In a pilot study we recorded NIR surface scans by laser triangulation from 30 volunteers of different skin type. A ground truth for the soft-tissue thickness was segmented from MR scans. After initially matching the NIR scans to the MR reference, Gaussian processes were trained to predict tissue thicknesses from NIR backscatter. Moreover, motion starting from this initial registration was simulated by 5000 random transformations of the NIR scan away from the MR reference. Re-registration to the MR scan was compared with and without tissue thickness support. RESULTS By adding prior knowledge to the backscatter features, such as incident angle and neighborhood information in the scanning grid, we showed that tissue thickness can be predicted with mean errors of <0.2 mm, irrespective of the skin type. With this additional information, the average registration error improved from 3.4 mm to 0.48 mm by a factor of 7. Misalignments of more than 1 mm were almost thoroughly (98.9%) pushed below 1 mm. CONCLUSIONS For almost all cases tissue-enhanced matching achieved better results than purely spatial registration. Ambiguities can be minimized if the cutaneous structures do not agree. This valuable support for surface registration increases tracking robustness and avoids misalignment of tumor targets far from the registration site.
Collapse
Affiliation(s)
- Tobias Wissel
- Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany; Graduate School for Computing in Medicine and Life Science, University of Lübeck, Lübeck, Germany.
| | - Patrick Stüber
- Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany; Graduate School for Computing in Medicine and Life Science, University of Lübeck, Lübeck, Germany
| | - Benjamin Wagner
- Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany; Graduate School for Computing in Medicine and Life Science, University of Lübeck, Lübeck, Germany
| | - Ralf Bruder
- Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany
| | - Christian Erdmann
- Institute for Neuroradiology, Universitätsklinikum Schleswig-Hostein, Campus Lübeck, Lübeck, Germany
| | - Christin-Sophie Deutz
- Clinic for Oral and Maxillo-Facial Surgery, Universitätsklinikum Schleswig-Hostein, Campus Lübeck, Lübeck, Germany
| | - Benjamin Sack
- Department of Neurology, Universitätsklinikum Schleswig-Hostein, Campus Lübeck, Lübeck, Germany
| | - Jirapong Manit
- Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany; Graduate School for Computing in Medicine and Life Science, University of Lübeck, Lübeck, Germany
| | - Achim Schweikard
- Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany
| | - Floris Ernst
- Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany
| |
Collapse
|
11
|
Rodríguez-Herreros B, Amengual JL, Gurtubay-Antolín A, Richter L, Jauer P, Erdmann C, Schweikard A, López-Moliner J, Rodríguez-Fornells A, Münte TF. Microstructure of the superior longitudinal fasciculus predicts stimulation-induced interference with on-line motor control. Neuroimage 2015; 120:254-65. [DOI: 10.1016/j.neuroimage.2015.06.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 06/24/2015] [Accepted: 06/25/2015] [Indexed: 12/01/2022] Open
|
12
|
Nitschke MF, Vassilev K, Erdmann C, Binkofski F, Münte TF. Cerebellar control of preparing and executing eye and hand movements. KLIN NEUROPHYSIOL 2014. [DOI: 10.1055/s-0034-1371197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
13
|
Asani H, Erdmann C, Aigner T, Berghäußer U, Linsmeier B, Koch A, Franke C. Drei meta-/synchrone Adenokarzinome der Lunge 2010/13 mit differierenden, komplexen Mutationen des Exon 19 oder Deletion des Exon 21 – ein Fallbericht. Pneumologie 2014. [DOI: 10.1055/s-0033-1364129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
14
|
Beyer F, Münte TF, Erdmann C, Krämer UM. Emotional reactivity to threat modulates activity in mentalizing network during aggression. Soc Cogn Affect Neurosci 2013; 9:1552-60. [PMID: 23986265 DOI: 10.1093/scan/nst146] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aggression is a common response to provocation, albeit with considerable interindividual differences. In this fMRI study, we investigated emotional reactivity to threat as possible link between provocation and aggression, as well as the neural correlates of this relationship. We hypothesized that emotional reactivity, measured as fear potentiation (FP) of the startle response, would be negatively associated with aggressive behavior and would modulate neural activity during an aggressive interaction. In 30 healthy female participants, FP was measured as the difference between blink amplitudes while watching threatening vs neutral pictures. Participants subsequently engaged in a variant of the Taylor Aggression Paradigm (TAP), while being scanned. During the TAP, participants selected a punishment level for either a highly provoking or a nonprovoking opponent. There was no difference in aggressive behavior between participants high and low in FP. However, we found a negative correlation between FP and the neural provocation effect in several regions of a network previously associated with mentalizing including the medial prefrontal cortex, precuneus and the temporo-parietal junction. Independently of the FP variability, aggressive behavior correlated with the provocation effect on activity in the caudate nucleus. Our results indicate that during a provocative confrontation, high emotional reactivity to threat suppresses recruitment of the mentalizing network.
Collapse
Affiliation(s)
- Frederike Beyer
- Department of Neurology and Department of Neuroradiology, University of Lübeck, RatzeburgerAllee 160, 23538 Lübeck, Germany
| | - Thomas F Münte
- Department of Neurology and Department of Neuroradiology, University of Lübeck, RatzeburgerAllee 160, 23538 Lübeck, Germany
| | - Christian Erdmann
- Department of Neurology and Department of Neuroradiology, University of Lübeck, RatzeburgerAllee 160, 23538 Lübeck, Germany Department of Neurology and Department of Neuroradiology, University of Lübeck, RatzeburgerAllee 160, 23538 Lübeck, Germany
| | - Ulrike M Krämer
- Department of Neurology and Department of Neuroradiology, University of Lübeck, RatzeburgerAllee 160, 23538 Lübeck, Germany
| |
Collapse
|
15
|
Nitschke M, Körper J, Binkofski F, Erdmann C, Wolters A, Klein C. Kompensation verminderter cerebelläre Funktion durch vermehrte Rekrutierung cerebraler cortikaler Areale bei Patienten mit hereditärer spinocerebellärer Ataxie (SCA). KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Trillenberg P, Bremer S, Oung S, Erdmann C, Schweikard A, Richter L. Variation of stimulation intensity in transcranial magnetic stimulation with depth. J Neurosci Methods 2012; 211:185-90. [DOI: 10.1016/j.jneumeth.2012.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 08/28/2012] [Accepted: 09/04/2012] [Indexed: 01/20/2023]
|
17
|
Al-Khaled M, Heldmann M, Erdmann C, Göttlich M, Klein C, Münte TF, Hagenah J. Funktionelle und strukturelle Konnektivität beim M. Parkinson mit moderater und hoher Hyperechogenität der Substantia Nigra. KLIN NEUROPHYSIOL 2012. [DOI: 10.1055/s-0032-1301448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
18
|
Willenborg B, Nagel M, Jauch-Chara K, Erdmann C, Lehnert H, Oltmanns KM. Increased neuronal activation and cognitive performance by detemir as compared to human insulin upon a working memory task – an fMRI study. Pharmacopsychiatry 2011. [DOI: 10.1055/s-0031-1292561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
19
|
Melchert U, Erdmann C, Kreuder F, Nitschke M, Weiss H. Funktionelle Magnet Resonanz Tomografie des Kleinhirns bei komplexen motorischen Aufgaben. BIOMED ENG-BIOMED TE 2009. [DOI: 10.1515/bmte.2000.45.s1.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
20
|
Höblinger A, Erdmann C, Strassburg CP, Sauerbruch T, Lammert F. Coinheritance of hereditary spherocytosis and reversibility of cirrhosis in a young female patient with hereditary hemochromatosis. Eur J Med Res 2009; 14:182-4. [PMID: 19380292 PMCID: PMC3401009 DOI: 10.1186/2047-783x-14-4-182] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Here we report a 33-years-old woman with hereditary spherocytosis and hemochromatosis due to homozygosity for the C282Y mutation of the HFE gene. The coinheritance of both conditions led to severe iron overload and liver cirrhosis at young age. The patient was treated by repeated phlebotomy, and reversibility of cirrhosis was documented by transient elastography. This report discusses the pathophysiology of iron accumulation in patients with hemolytic anemia combined with HFE C282Y homozygosity. The case indicates that patients with hematological disorders characterized by increased erythropoetic activity should be screened for HFE mutations.
Collapse
Affiliation(s)
- A Höblinger
- Department of Internal Medicine I, University Hospital Bonn, University of Bonn, Sigmund Freud Str. 25, 53105 Bonn, Germany.
| | | | | | | | | |
Collapse
|
21
|
Leyendecker S, Mohr C, Erdmann C, Petersen D, Helmchen C. Mechanismen der Schmerzlinderung: Der präfrontale Kortex unterscheidet zwischen empfundener und ausgeführter Schmerzkontrolle bei der Hitzehyperalgesie. KLIN NEUROPHYSIOL 2009. [DOI: 10.1055/s-0029-1216091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
22
|
Nitschke M, Ludwig K, Erdmann C, Kömpf D, Heide W, Binkofski F. Dissociation between coverts shifts of attention and saccadic eye movements demonstrate functional segregation of the cerebellar hemispheres. Clin Neurophysiol 2007. [DOI: 10.1016/j.clinph.2006.11.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
23
|
Nitschke M, Melchert U, Erdmann C, Born J, Fischer S. Sleep shapes more effective cerebro-cerebellar networks performing sequential motor tasks. Akt Neurol 2007. [DOI: 10.1055/s-2007-987553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
24
|
Helmchen C, Mohr C, Erdmann C, Binkofski F, Büchel C. Neural activity related to self- versus externally generated painful stimuli reveals distinct differences in the lateral pain system in a parametric fMRI study. Hum Brain Mapp 2006; 27:755-65. [PMID: 16453310 PMCID: PMC6871328 DOI: 10.1002/hbm.20217] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Self-generated sensory stimulation can be distinguished from externally generated stimulation that is otherwise identical. To determine how the brain differentiates external from self-generated noxious stimulation and which structures of the lateral pain system use neural signals to predict the sensory consequences of self-generated painful stimulation, we used functional magnetic resonance imaging to examine healthy human subjects who received thermal-contact stimuli with noxious and non-noxious temperatures on the resting right hand in random order. These stimuli were internally (self-generated) or externally generated. Two additional conditions served as control conditions: to account for stimulus onset uncertainty, acoustic stimuli preceding the same thermal stimuli were used with variable or fixed delays but without any stimulus-eliciting movements. Whereas graded pain-related activity in the insula and secondary somatosensory cortex (SII) was independent of how the stimulus was generated, it was attenuated in the primary somatosensory cortex (SI) during self-generated stimulation. These data agree with recent concepts of the parallel processing of nociceptive signals to the primary and secondary somatosensory cortices. They also suggest that brain areas that encode pain intensity do not distinguish between internally or externally applied noxious stimuli, i.e., this adaptive biological mechanism prevents harm to the individual. The attenuated activation of SI during self-generated painful stimulation might be a result of the predictability of the sensory consequences of the pain-related action.
Collapse
Affiliation(s)
- Christoph Helmchen
- Neuroimage Nord, Department of Neurology, University of Lübeck, Lübeck, Germany.
| | | | | | | | | |
Collapse
|
25
|
Müller T, Erdmann C, Muhlack S, Bremen D, Przuntek H, Goetze O, Woitalla D. Pharmacokinetic behaviour of levodopa and 3-O-methyldopa after repeat administration of levodopa/carbidopa with and without entacapone in patients with Parkinson's disease. J Neural Transm (Vienna) 2006; 113:1441-8. [PMID: 16604302 DOI: 10.1007/s00702-006-0442-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2005] [Accepted: 12/20/2005] [Indexed: 11/28/2022]
Abstract
Addition of the catechol-O-methyltransferase (COMT) inhibitor entacapone (EN) prolongs plasma metabolism of levodopa (LD). Objectives were to determine the clinical response after EN addition and the plasma degradation of LD and 3-O-methyldopa [3-OMD]. Not optimum treated hospitalised patients with Parkinson's disease received the same LD dosage on the first day only with carbidopa (CD) and on the second day with CD and EN (t.i.d.) within a standardised setting. We scored motor symptoms and measured LD- and 3-OMD levels on both days at fixed moments. Motor impairment significant better improved probably due to significant higher maximum concentrations [C(max)] and computed area under the curve values of LD levels during the LD/CD/EN condition. Time to C(max) of LD was significantly delayed after the first two LD/CD/EN intakes. An impact of EN on 3-OMD levels appeared. A possibly augmented LD absorption and a prolonged LD metabolism after EN supplementation may contribute to a more continuous LD delivery to the brain.
Collapse
Affiliation(s)
- T Müller
- Department of Neurology, St. Josef Hospital, Ruhr University Bochum, Bochum, Germany.
| | | | | | | | | | | | | |
Collapse
|
26
|
Nitschke MF, Erdmann C, Trillenberg P, Sprenger A, Kock N, Sperner J, Klein C. Functional MRI reveals activation of a subcortical network in a 5-year-old girl with genetically confirmed myoclonus-dystonia. Neuropediatrics 2006; 37:79-82. [PMID: 16773505 DOI: 10.1055/s-2006-924109] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We investigated a five-year-old girl suffering from genetically confirmed, action-induced myoclonus-dystonia (M-D) with functional magnetic resonance imaging (MRI). We compared the activation pattern by movements of her right hand as if drawing a picture, which elicited M-D, with simple snapping movements (without overt M-D). The drawing and snapping conditions resulted in activation of a motor network including the motor cortex, the putamen, and the cerebellar hemispheres. The direct comparison of the drawing condition with snapping as control revealed specific activations within the thalamus and the dentate nucleus. An age matched healthy control did not show significant activation within the thalamus or dentate nucleus.
Collapse
Affiliation(s)
- M F Nitschke
- Department of Neurology, University Hospital of Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany.
| | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
Learning a motor skill involves a latent process of consolidation that develops after training to enhance the skill in the absence of any practice and crucially depends on sleep. Here, we show that this latent consolidation during sleep changes the brain representation of the motor skill by reducing overall the neocortical contributions to the representation. Functional magnetic resonance brain imaging was performed during initial training and 48 h later, at retesting, on a sequential finger movement task with training followed by either a night of regular sleep or sleep deprivation. An additional night of sleep for all subjects served to rule out unspecific effects of sleep loss at retrieval testing. Posttraining sleep, but not sleep deprivation, led to improved motor skill performance at retrieval. This sleep-dependent improvement was linked to greatly reduced brain activation in prefrontal, premotor, and primary motor cortical areas, along with a stronger involvement of left parietal cortical regions. Our findings indicate that storing a motor skill during sleep reorganizes its brain representation toward enhanced efficacy.
Collapse
Affiliation(s)
- Stefan Fischer
- Department of Neuroendocrinology, University of Lübeck, D-23538 Lübeck, Germany
| | | | | | | | | |
Collapse
|
28
|
Nitschke M, Ludwig K, Erdmann C, Kömpf D, Heide W, Binkofski F. Dissociation between coverts shifts of attention and saccadic eye movements demonstrate functional segregation of the cerebellar hemispheres. KLIN NEUROPHYSIOL 2006. [DOI: 10.1055/s-2006-939248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
29
|
Nagel M, Sprenger A, Zapf S, Erdmann C, Kömpf D, Heide W, Binkofski F, Lencer R. Parametric modulation of cortical activation during smooth pursuit with and without target blanking. An fMRI study. Neuroimage 2006; 29:1319-25. [PMID: 16216531 DOI: 10.1016/j.neuroimage.2005.08.050] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2005] [Revised: 08/26/2005] [Accepted: 08/31/2005] [Indexed: 10/25/2022] Open
Abstract
Smooth pursuit eye movements (SPEM) are performed to track slowly moving visual targets and are accompanied by saccades whenever foveal representation is lost. In the present study, we correlated the cerebral activation as assessed by functional magnetic resonance imaging with parameters of eye movement performance in order to determine the cortical areas involved in the retinal and extraretinal processing of maintaining smooth pursuit velocity (SPV) and generating saccades in 16 healthy males. The stimulus consisted of a target moving at a constant velocity of 10 degrees/s with and without target blanking. During constant target presentation, SPV was positively correlated with the BOLD signal in the right V5 complex and negatively correlated with the BOLD response in the left dorsolateral prefrontal cortex (DLPFC). In the condition with target blanking, additional negative correlations with SPV were found in the left frontal eye field (FEF), the left parietoinsular vestibular cortex (PIVC) and the left angular gyrus. Saccadic frequency was negatively correlated with activations of the right mesial intraparietal sulcus (IPS) during both conditions and the right premotor area during continuous target presentation. We conclude that V5 is directly related to the maintenance of an optimal smooth pursuit velocity during visual feedback, whereas the FEF, PFC, angular gyrus and PIVC are involved in reconstitution and prediction whenever SPV decreases, especially during maintenance of smooth pursuit in the absence of a visual target. Furthermore, we suggest that parietal areas are related to the suppression of saccades during smooth pursuit.
Collapse
Affiliation(s)
- Matthias Nagel
- Department of Psychiatry and Psychotherapy, University of Luebeck, Luebeck, Germany
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Vassilew G, Erdmann C, Kömpf D, Heide W, Binkofski F, Nitschke M. Calculation of goal directed movements demonstrates a functional segregation of the cerebellar hemispheres. Akt Neurol 2006. [DOI: 10.1055/s-2006-953039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
31
|
van Eimeren T, Klein C, Buhmann C, Erdmann C, Büchel C, Binkofski F, Siebner H. Parkinson's disease is associated with an overactivity of executive motor cortical areas compared with Parkin-associated parkinsonism. Akt Neurol 2006. [DOI: 10.1055/s-2006-952963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
32
|
Mohr C, Erdmann C, Binkofski F, Büchel C, Helmchen C. Schmerzmodulation durch Prädiktion. Akt Neurol 2005. [DOI: 10.1055/s-2005-919285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
33
|
Lienau F, Erdmann C, Melchert U, Nitschke M. Räumlich-zeitliche Abfolge sensomotorischer Events im cerebro-cerebellären Netzwerk: eine fMRT-Studie. Akt Neurol 2005. [DOI: 10.1055/s-2005-919576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
34
|
Riesel J, Binkofski F, Erdmann C, Klein C, Kömpf D, Wolters A, Rolfs A, Nitschke M. Kompensationsmechanismen innerhalb des zerebro-zerebellären Netzwerkes zur Steuerung von Augen- und Handbewegungen bei Patienten mit hereditärer spinocerebellärer Ataxie (SCA). Akt Neurol 2005. [DOI: 10.1055/s-2005-919552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
35
|
Buhmann C, Binkofski F, Klein C, Büchel C, van Eimeren T, Erdmann C, Hedrich K, Kasten M, Hagenah J, Deuschl G, Pramstaller PP, Siebner HR. Motor reorganization in asymptomatic carriers of a single mutant Parkin allele: a human model for presymptomatic parkinsonism. ACTA ACUST UNITED AC 2005; 128:2281-90. [PMID: 15947065 DOI: 10.1093/brain/awh572] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Mutations in the Parkin gene are the most common known single cause of early-onset parkinsonism. It has been shown that asymptomatic carriers with a single mutant allele have latent presynaptic dopaminergic dysfunction in the striatum. Here we used functional MRI to map movement-related neuronal activity during internally selected or externally determined finger movements in 12 asymptomatic carriers of a Parkin mutation and 12 healthy non-carriers. Mean response times were 63 ms shorter during internally selected movements than during externally guided movements (P = 0.003). There were no differences in mean response times between groups (P > 0.2). Compared with externally determined movements, the internal selection of movements led to a stronger activation of rostral motor areas, including the rostral cingulate motor area (rCMA), rostral supplementary motor area, medial and dorsolateral prefrontal cortices. The genotype had a significant impact on movement-related activation patterns. Asymptomatic carriers showed a stronger increase in movement-related activity in the right rCMA and left dorsal premotor cortex, but only if movements relied on internal cues. In addition, synaptic activity in the rCMA had a stronger influence on activity in the basal ganglia in the context of internally selected movements in asymptomatic carriers relative to non-carriers. We infer that this reorganization of striatocortical motor loops reflects a compensatory effort to overcome latent nigrostriatal dysfunction.
Collapse
Affiliation(s)
- C Buhmann
- NeuroImage-Nord, Hamburg-Kiel-Lübeck, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Mohr C, Binkofski F, Erdmann C, Büchel C, Helmchen C. The anterior cingulate cortex contains distinct areas dissociating external from self-administered painful stimulation: a parametric fMRI study. Pain 2005; 114:347-357. [PMID: 15777860 DOI: 10.1016/j.pain.2004.12.036] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2004] [Revised: 11/25/2004] [Accepted: 12/28/2004] [Indexed: 01/27/2023]
Abstract
The anterior cingulate cortex (ACC) has a pivotal role in human pain processing by integrating sensory, executive, attentional, emotional, and motivational components of pain. Cognitive modulation of pain-related ACC activation has been shown by hypnosis, illusion and anticipation. The expectation of a potentially noxious stimulus may not only differ as to when but also how the stimulus is applied. These combined properties led to our hypothesis that ACC is capable of distinguishing external from self-administered noxious tactile stimulation. Thermal contact stimuli with noxious and non-noxious temperatures were self-administered or externally applied at the resting right hand in a randomized order. Two additional conditions without any stimulus-eliciting movements served as control conditions to account for the certainty and uncertainty of the impending stimulus. Calculating the differences in the activation pattern between self-administered and externally generated stimuli revealed three distinct areas of activation that graded with perceived stimulus intensity: (i) in the posterior ACC with a linear increase during external but hardly any modulation for the self-administered stimulation, (ii) in the midcingulate cortex with activation patterns independent of the mode of application and (iii) in the perigenual ACC with increasing activation during self-administered but decreasing activation during externally applied stimulation. These data support the functional segregation of the human ACC: the posterior ACC may be involved in the prediction of the sensory consequences of pain-related action, the midcingulate cortex in pain intensity coding and the perigenual ACC is related to the onset uncertainty of the impending stimuli.
Collapse
Affiliation(s)
- C Mohr
- Neuroimage Nord (NIN), Department of Neurology, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany Neuroimage Nord (NIN), Department of Neurology, University of Hamburg, Martinistr. 52, 20246 Hamburg, Germany
| | | | | | | | | |
Collapse
|
37
|
Erdmann C, Muhlack S, Bremen D, Woitalla D, Przuntek H. Die Effizienz von Levodopa/Carbidopa/Entacapone auf komplexe Bewegungsabläufe bei Parkinson-Patienten. Akt Neurol 2005. [DOI: 10.1055/s-2005-866678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
38
|
Nitschke MF, Arp T, Stavrou G, Erdmann C, Heide W. The cerebellum in the cerebro-cerebellar network for the control of eye and hand movements--an fMRI study. Prog Brain Res 2005; 148:151-64. [PMID: 15661188 DOI: 10.1016/s0079-6123(04)48013-3] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The coordination of optical information and manipulation of objects in space by eye and hand movements is controlled by a cerebro-cerebellar network. The differential influence of prefrontal, motor, or parietal areas in combination with cerebellar areas, especially within the posterior hemispheres, on the control of eye and hand movements is not very well defined. Using fMRI we investigated the functional representation of isolated or combined eye and hand movements within the cerebellum and the impact of differential cognitive preload on the activation patterns. Each task consisted of the performance of saccades or hand movements triggered by a cue presented on a screen in front of the scanner. Saccades were tested for visually guided saccades, triple step saccades, and for visuospatial memory. Sequential finger opposition movements were tested for predictive and nonpredictive movements. Combined and isolated eye-hand reaching movements were tested toward a target presented in 5 different horizontal positions. Visually guided saccades activated the cerebellar vermis lobuli VI-VII, triple step saccades, including visuospatial memorization, in addition the cerebellar hemispheres lobuli VII-VIII. Sequential finger movements and reaching movements activated a cerebellar network consisting of the lobuli IV-VI, the vermis, and the lobuli VII-VIII with broader areas and additional regions especially within the lobus VII for more complex movements. The combined in contrast to the isolated performance of eye and hand movements demonstrated specialized activation foci within the cerebellar vermis and posterior hemispheres. We could demonstrate a differential representation of eye and hand movements within the cerebellum. Additional "cognitive" preload within a given task leads to additional activation of the posterior cerebellar hemispheres, with a subspecialization corresponding to premotor and parietal area connections.
Collapse
Affiliation(s)
- M F Nitschke
- Department of Neurology, Medical University of Lübeck, Germany.
| | | | | | | | | |
Collapse
|
39
|
Helmchen C, Mohr C, Erdmann C, Binkofski F. Cerebellar neural responses related to actively and passively applied noxious thermal stimulation in human subjects: a parametric fMRI study. Neurosci Lett 2004; 361:237-40. [PMID: 15135937 DOI: 10.1016/j.neulet.2003.12.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Cerebellar activation is consistently found during noxious stimulation but little is known about its pain-related specificity. Under natural circumstances noxious stimuli are actively or passively delivered with concomitant tactile sensory stimulation. Using fMRI we therefore studied pain-related cerebellar activation with innocuous and noxious thermal stimuli in a parametric design taking motor execution as confounding factor into account. With respect to psychophysical pain ratings anterior vermal and ipsilateral hemispheric lobule VI activation was parametrically modulated for stimulus intensity in actively but not in passively elicited thermal stimulation. The cerebellum seems to be capable of distinguishing active from passive painful stimuli.
Collapse
Affiliation(s)
- C Helmchen
- Department of Neurology, University of Luebeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany.
| | | | | | | |
Collapse
|
40
|
Lienau F, Erdmann C, Melchert U, Nitschke M. Time-Delays during Processing of Sensory-Motor Events within the Cerebro-Cerebellar Network: An fMRI Study. KLIN NEUROPHYSIOL 2004. [DOI: 10.1055/s-2004-832078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
41
|
Nitschke M, Ludwig K, Vassilev G, Erdmann C, Kömpf D, Heide W, Binkofski F. Differential Functional Predominance of the Frontal and Parietal Areas during Performance of Isolated or Combined Eye and Hand Reaching Movements. KLIN NEUROPHYSIOL 2004. [DOI: 10.1055/s-2004-832112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
42
|
Helmchen C, Mohr C, Erdmann C, Binkofski F, Büchel C. Der anteriore cinguläre Kortex unterscheidet selbst- von fremdzugeführter Schmerzreizung: eine parametrische fMRT-Studie. KLIN NEUROPHYSIOL 2004. [DOI: 10.1055/s-2004-832013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
43
|
Nitschke MF, Binkofski F, Buccino G, Posse S, Erdmann C, Kömpf D, Seitz RJ, Heide W. Activation of cerebellar hemispheres in spatial memorization of saccadic eye movements: an fMRI study. Hum Brain Mapp 2004; 22:155-64. [PMID: 15108303 PMCID: PMC6871891 DOI: 10.1002/hbm.20025] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2003] [Accepted: 12/02/2003] [Indexed: 11/06/2022] Open
Abstract
What mechanisms allow us to direct a precise saccade to a remembered target position in space? The cerebellum has been proposed to be involved not only in motor and oculomotor control, but also in perceptual and cognitive functions. We used functional MRI (Echoplanar imaging at 1.5 T) to investigate the role of the cerebellum in the control of externally triggered and internally generated saccadic eye movements of high and low memory impact, in six healthy volunteers. Memory-guided saccades to remembered locations of 3 targets (triple-step saccades) in contrast to either central fixation or to visually guided saccades activated the cerebellar hemispheres predominantly within lobuli VI-crus I. The same areas were activated when an analogous visuospatial working memory task was contrasted to the triple-step saccades. Visually guided saccades activated the posterior vermis and the triple-step saccades, contrasted to the working memory task, activated predominantly the posterior vermis and paravermal regions. Our data confirm the primary involvement of the posterior vermis for visually-triggered saccadic eye movements and present novel evidence for a role of the cerebellar hemispheres in the mnemonic and visuospatial control of memory-guided saccades.
Collapse
Affiliation(s)
- Matthias F Nitschke
- Department of Neurology, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Lencer R, Nagel M, Sprenger A, Zapf S, Erdmann C, Heide W, Binkofski F. Cortical mechanisms of smooth pursuit eye movements with target blanking. An fMRI study. Eur J Neurosci 2004; 19:1430-6. [PMID: 15016102 DOI: 10.1111/j.1460-9568.2004.03229.x] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Smooth pursuit eye movements are evoked by retinal image motion of visible moving objects and can also be driven by the internal representation of a target due to extraretinal mechanisms (e.g. efference copy). To delineate the corresponding neuronal correlates, functional magnetic resonance imaging at 1.5 T was applied during smooth pursuit at 10 degrees /s with continuous target presentation and target blanking for 1 s to 16 right-handed healthy males. Eye movements were assessed during scanning sessions by infra-red reflection oculography. Smooth pursuit performance was optimal when the target was visible but decreased to a residual velocity of about 30% of the velocity observed during continuous target presentation. Random effects analysis of the imaging data yielded an activation pattern for smooth pursuit in the absence of a visual target (in contrast to continuous target presentation) which included a number of cortical areas in which extraretinal information is available such as the frontal eye field, the superior parietal lobe, the anterior and the posterior intraparietal sulcus and the premotor cortex, and also the supplementary and the presupplementary eye field, the supramarginal gyrus, the dorsolateral prefrontal cortex, cerebellar areas and the basal ganglia. We suggest that cortical mechanisms such as prediction, visuo-spatial attention and transformation, multimodal visuomotor control and working memory are of special importance for maintaining smooth pursuit eye movements in the absence of a visible target.
Collapse
Affiliation(s)
- Rebekka Lencer
- Department of Psychiatry and Psychotherapy, University of Leubeck, Ratzeburger Allee 160, 23538 Luebeck, Germany.
| | | | | | | | | | | | | |
Collapse
|
45
|
Abstract
For the first time, we provide functional magnetic resonance imaging evidence for a recent hypothesis that saccadic oscillations in opsoclonus may result from a disinhibition of the cerebellar fastigial nuclei. Two patients with severe opsoclonus were examined during fixation in the light and during eye closure and in darkness where opsoclonus disappeared. Their activation during opsoclonus was compared with 10 healthy subjects performing visually guided and self-paced saccades in the light and darkness. In contrast to the control subjects, the patients showed a strong bilateral midline cerebellar activation that involved the deep cerebellar nuclei. This is probably not just a secondary finding in the fastigial nuclei due to the high frequent saccadic activity because there was, concomitantly, no oculomotor vermal activation, which is normally seen in healthy subjects. We propose that cerebellar activation of the fastigial nuclei may cause opsoclonus via their projections to the brainstem saccadic generator.
Collapse
|
46
|
Lienau FS, Erdmann C, Melchert U, Nitschke MF. Cerebro-cerebelläre Verarbeitung zeitlich nicht prädizierbarer sensomotorischer Events: Eine fMRT-Studie. Akt Neurol 2004. [DOI: 10.1055/s-2004-833293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
47
|
Mohr C, Erdmann C, Binkofski F, Büchel C, Helmchen C. Der anteriore cinguläre Kortex unterscheidet selbst- von fremdzugeführter Schmerzreizung: eine parametrische fMRT-Studie. Akt Neurol 2004. [DOI: 10.1055/s-2004-833040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
48
|
Nitschke MF, Fischer S, Melchert U, Erdmann C, Born J. Sleep-dependent motor memory formation detected by fMRI. Akt Neurol 2004. [DOI: 10.1055/s-2004-833059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
49
|
Nitschke MF, Arp T, Sprenger A, Erdmann C, Melchert U, Petersen D, Kömpf D, Binkofski F, Heide W. Zerebro-zerebelläre Aktivierungen bei koverten Verschiebungen der Aufmerksamkeit im Vergleich zu Augenbewegungen. KLIN NEUROPHYSIOL 2003. [DOI: 10.1055/s-2003-816501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
50
|
Nitschke MF, Erdmann C, Müller B, Kock N, Sprenger A, Melchert U, Pramstaller P, Sperner J, Klein C. Subkortikale Aktivierungen bei einem Kind mit genetisch gesicherter Myoklonus-Dystonie. KLIN NEUROPHYSIOL 2003. [DOI: 10.1055/s-2003-816502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|