Hense, Katharina and Plank, Tina and Wendl, Christina and Dodoo-Schittko, Frank and Bumes, Elisabeth and Greenlee, Mark W. and Schmidt, Nils Ole and Proescholdt, Martin and Rosengarth, Katharina (2021) fMRI Retinotopic Mapping in Patients with Brain Tumors and Space-Occupying Brain Lesions in the Area of the Occipital Lobe. CANCERS, 13 (10): 2439. ISSN , 2072-6694
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Simple Summary Functional magnetic resonance imaging (fMRI) in patients with brain tumors enables the visualization of eloquent cortical areas and can be used for planning surgical interventions and assessing the risk of postoperative functional deficits. While preoperative fMRI paradigms used to determine the localization of speech-critical or motor areas dominate the literature, there are hardly any studies that investigate the retinotopic organization of the visual field in patients with occipital lesions or tumors. The aim of this study was to evaluate the effect of a brain tumor or space-occupying brain lesions on the retinotopic organization of the occipital cortex, the activation of and the functional connectivity between cortical areas involved in visual processing. We found a high degree of similarity in the activation profiles of patients and healthy controls, indicating that the retinotopic organization of the visual cortex can reliably be described by fMRI retinotopic mapping as part of the preoperative examination of patients with tumors and space-occupying brain lesions. Functional magnetic resonance imaging (fMRI) is a valuable tool in the clinical routine of neurosurgery when planning surgical interventions and assessing the risk of postoperative functional deficits. Here, we examined how the presence of a brain tumor or lesion in the area of the occipital lobe affects the results of fMRI retinotopic mapping. fMRI data were evaluated on a retrospectively selected sample of 12 patients with occipital brain tumors, 7 patients with brain lesions and 19 control subjects. Analyses of the cortical activation, percent signal change, cluster size of the activated voxels and functional connectivity were carried out using Statistical Parametric Mapping (SPM12) and the CONN and Marsbar toolboxes. We found similar but reduced patterns of cortical activation and functional connectivity between the two patient groups compared to a healthy control group. Here, we found that retinotopic organization was well-preserved in the patients and was comparable to that of the age-matched controls. The results also showed that, compared to the tumor patients, the lesion patients showed higher percent signal changes but lower values in the cluster sizes of the activated voxels in the calcarine fissure region. Our results suggest that the lesion patients exhibited results that were more similar to those of the control subjects in terms of the BOLD signal, whereas the extent of the activation was comparable to that of the tumor patients.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ALTERED FUNCTIONAL CONNECTIVITY; CENTRAL VISION LOSS; VISUAL-FIELD MAPS; MOTOR CORTEX; ACTIVATION; MRI; ADJACENT; TOOLBOX; GLIOMAS; LATERALIZATION; brain tumor; vessel malformation; functional magnetic resonance imaging; blood-oxygenation level-dependent; task-based functional connectivity; occipital lobe; retinotopic mapping; preoperative noninvasive mapping; preoperative imaging |
| Subjects: | 100 Philosophy & psychology > 150 Psychology 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Neurochirurgie Medicine > Lehrstuhl für Neurologie Medicine > Lehrstuhl für Röntgendiagnostik Human Sciences > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Jul 2022 09:20 |
| Last Modified: | 13 Jul 2022 09:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/45763 |
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