Research Topics
| Daniel GüllmarSummaryAffiliation: Friedrich Schiller University Country: Germany Publications
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Detail Information
Publications
DTI measurements of isotropic and anisotropic mediaD Güllmar
Institute for Diagnostic and Interventional Radiology, Biomagnetic Center, Friedrich Schiller University Jena, Germany
Biomed Tech (Berl) 47:420-2. 2002..5 T clinical whole-body scanner. To investigate these influences on the measurements of anisotropic media the same experiments were performed with a carrot...- Influence of anisotropic conductivity on EEG source reconstruction: investigations in a rabbit modelDaniel Güllmar
Biomagnetic Center, Department of Neurology, Jena, Germany
IEEE Trans Biomed Eng 53:1841-50. 2006..In contrast, dipole orientation and dipole strength are influenced significantly by the anisotropy. We conclude that the inclusion of tissue anisotropy information improves source estimation procedures... - Influence of anisotropic electrical conductivity in white matter tissue on the EEG/MEG forward and inverse solution. A high-resolution whole head simulation studyDaniel Güllmar
Medical Physics Group, Department of Diagnostic and Interventional Radiology, Jena University Hospital Philosophenweg 3, 07743 Jena, Germany
Neuroimage 51:145-63. 2010.... - Reduced anterior cingulate cognitive activation is associated with prefrontal-temporal cortical thinning in schizophreniaC Christoph Schultz
Department of Psychiatry and Psychotherapy, Friedrich Schiller University Jena, Jena, Germany
Biol Psychiatry 71:146-53. 2012..Therefore, this study investigated the association of anterior cingulate cognitive activation and cortical thickness in schizophrenia combining functional magnetic resonance imaging (fMRI) and surface-based morphometry... - Neural activation and radial diffusivity in schizophrenia: combined fMRI and diffusion tensor imaging studyKathrin Koch
Department of Psychiatry and Psychotherapy, Friedrich Schiller University Jena, Germany
Br J Psychiatry 198:223-9. 2011..Most studies have investigated changes in fractional anisotropy, whereas alterations in radial or axial diffusivity have barely been investigated until now... - ADC changes in schizophrenia: a diffusion-weighted imaging studyIgor Nenadic
Department of Psychiatry and Psychotherapy, Friedrich Schiller University of Jena, Philosophenweg 3, 07743, Jena, Germany
Eur Arch Psychiatry Clin Neurosci 261:213-6. 2011..Changes in other parameters like fractional anisotropy (FA) might be a more sensitive indicator of white matter pathology in this disorder... - Disrupted white matter integrity of corticopontine-cerebellar circuitry in schizophreniaKathrin Koch
Department of Psychiatry and Psychotherapy, Friedrich Schiller University Jena, Jahnstr 3, Philosophenweg 3, 07740, Jena, Germany
Eur Arch Psychiatry Clin Neurosci 260:419-26. 2010..They corroborate preceding findings of white matter structural deficits in mainly long-ranging association fibers and provide first evidence for neuroplastic changes in terms of an increased directionality in more inferior fiber tracts... - Influence of tissue conductivity changes on the EEG signal in the human brain: a simulation studyThomas Jochmann
Medical Physics Group, Department of Diagnostic and Interventional Radiology, Jena University Hospital, Germany
Z Med Phys 21:102-12. 2011..The results demonstrate that pathological tissue changes have to be taken into account when evaluating EEG signals, especially when performing source localization... - White matter structure and symptom dimensions in obsessive-compulsive disorderKathrin Koch
Department of Psychiatry and Psychotherapy, University Hospital Jena, Friedrich Schiller University Jena, Philosophenweg 3, 07740 Jena, Germany
J Psychiatr Res 46:264-70. 2012..Hence, different symptom dimensions must be taken into account in order to disentangle the neurobiological underpinnings of OCD... - [Comparison of long-axis and short-axis PROPELLER-EPI for diffusion-weighted Magnetic Resonance Imaging]Matthias RoBbach
Medical Physics Group, Department of Diagnostic and Interventional Radiology, Jena University Hospital, Philosophenweg, Jena, Germany
Z Med Phys 21:33-41. 2011..and that the results of the diffusion weighted measurements of both sequences agreed well with those of the reference sequence... - White matter abnormalities and brain activation in schizophrenia: a combined DTI and fMRI studyRalf G M Schlösser
Department of Psychiatry and Psychotherapy, Friedrich Schiller University, 07743 Jena, Germany
Schizophr Res 89:1-11. 2007..It highlights a potential relationship between anatomical changes in a frontal-temporal anatomical circuit and functional alterations in the prefrontal cortex... - Fractional anisotropy correlates with auditory simple reaction time performanceStefan Bohr
Biomagnetic Center, Department of Neurology, Friedrich Schiller University Jena, Erlanger Allee 101, Jena, Germany
Brain Res 1186:194-202. 2007..The presented results identify brain areas involved in the processing speed of the aSRT tasks. We propose that the presented findings are due to an influence of participants' right hand preference on both FA and aSRT measures... - Diffusion tensor imaging: the normal evolution of ADC, RA, FA, and eigenvalues studied in multiple anatomical regions of the brainUlrike Löbel
Institute of Diagnostic and Interventional Radiology, University Hospital Jena, Jena, Germany
Neuroradiology 51:253-63. 2009..Age-dependent changes were assessed using the slope m of the fit functions that best described the data... - 1H-MR spectroscopic detection of metabolic changes in pain processing brain regions in the presence of non-specific chronic low back painAlexander Gussew
Department of Diagnostic and Interventional Radiology I, Jena University Hospital, Jena, Germany
Neuroimage 54:1315-23. 2011..The morphological evaluation of anatomic brain data revealed a significantly decreased WM volume of 17% (p<0.05) as well as a non significant trend for GM volume increase in the anterior insula of patients...