Recent MRI studies have shown that abnormal functional connections in schizophrenia coexist with subtle changes in the structure of axons in the brain. However, there is a discrepancy in the literature concerning the relationship between white matter abnormalities and the occurrence of negative psychopathological symptoms. In the present study, we investigate the relationship between the altered white matter structure and specific psychopathology symptoms, i.e., subscales of Positive and Negative Syndrome Scale (PANSS) and Brief Negative Symptoms Scale (BNSS) in a sample of schizophrenia outpatients. For investigation on white matter abnormalities in schizophrenia, the diffusion tensor imaging analysis of between-group differences in main diffusion parameters by tract-based spatial statistics was conducted on schizophrenia outpatients and healthy controls. Hence, the correlation of PANSS and BNSS psychopathology subscales in the clinical group with fractional anisotropy was analyzed in the 17 selected cortical regions of interest. Presented between-group results revealed widespread loss of white matter integrity located across the brain in schizophrenia outpatients. Results on the white matter relationship with psychopathology revealed the negative correlation between fractional anisotropy in the left orbital prefrontal cortex, right Heschl's gyrus, bilateral precuneus and posterior cingulate cortex and the severity of asociality, as assessed with the BNSS. In conclusion, the presented study confirms the previous evidence on the widespread white matter abnormalities in schizophrenia outpatients and indicates the existence of the subtle but specific association between fractional anisotropy in the fronto-temporo-parietal regions with the asociality.Recent MRI studies have shown that abnormal functional connections in schizophrenia coexist with subtle changes in the structure of axons in the brain. However, there is a discrepancy in the literature concerning the relationship between white matter abnormalities and the occurrence of negative psychopathological symptoms. In the present study, we investigate the relationship between the altered white matter structure and specific psychopathology symptoms, i.e., subscales of Positive and Negative Syndrome Scale (PANSS) and Brief Negative Symptoms Scale (BNSS) in a sample of schizophrenia outpatients. For investigation on white matter abnormalities in schizophrenia, the diffusion tensor imaging analysis of between-group differences in main diffusion parameters by tract-based spatial statistics was conducted on schizophrenia outpatients and healthy controls. Hence, the correlation of PANSS and BNSS psychopathology subscales in the clinical group with fractional anisotropy was analyzed in the 17 selected cortical regions of interest. Presented between-group results revealed widespread loss of white matter integrity located across the brain in schizophrenia outpatients. Results on the white matter relationship with psychopathology revealed the negative correlation between fractional anisotropy in the left orbital prefrontal cortex, right Heschl’s gyrus, bilateral precuneus and posterior cingulate cortex and the severity of asociality, as assessed with the BNSS. In conclusion, the presented study confirms the previous evidence on the widespread white matter abnormalities in schizophrenia outpatients and indicates the existence of the subtle but specific association between fractional anisotropy in the fronto-temporo-parietal regions with the asociality.
- MeSH
- bílá hmota patologie patofyziologie MeSH
- cingulární gyrus patologie patofyziologie MeSH
- dospělí MeSH
- lidé MeSH
- mapování mozku metody MeSH
- mozek abnormality patologie patofyziologie MeSH
- pacienti ambulantní MeSH
- prefrontální mozková kůra patofyziologie MeSH
- schizofrenie patologie patofyziologie MeSH
- zobrazování difuzních tenzorů metody MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
BACKGROUND: There are several cortical areas related to the limbic system that form the output from the hippocampal formation whose cellular and morphological features are important for the onset and progression of AD. We hypothesized that there would be a significant difference in the size of cortical pyramidal neurons and that there would also be a hemispheric asymmetry between Alzheimer disease patients and controls. These differences would potentially be accompanied by an increase in the numbers of Fluoro-Jade B-positive degenerating cortical neurons and a corresponding decrease in the numbers of DAPI-stained cortical neuronal nuclei in subjects with AD compared to controls. Such changes could potentially be used as another marker in postmortem neuropathological diagnosis of AD. METHODS: We measured absolute numbers of DAPI and Fluoro-Jade B stained cells in five cortical areas of the limbic system and four subareas of planum temporale in the post-mortem brains of subjects with Alzheimer disease. We also measured the size of pyramidal neurons in layer III in the five cortical areas of the limbic system in these subjects. All measurements were performed separately for the left and right hemisphere in order to identify asymmetries between the two hemispheres. RESULTS: We observed a significant decrease in numbers of DAPI stained cells in layers IV-VI of the anterior cingulate gyrus on the right side, in layers I-III of the posterior cingulate gyrus on the left side, in layers IV-VI in the transition region from superior temporal gyrus into planum temporale on the right and in layers IV-VI in the transition from planum temporale to insular cortex on the left. We also observed a significant increase in the numbers of Fluoro-Jade stained cells in layers I-III of the anterior cingulate gyrus and in layers I-III on the left and layers IV-VI of the right gyrus of Heschl. Shortening of the size of layer III pyramidal neurons in subjects with Alzheimer´s disease was found in the anterior cingulate gyrus on the right, in the posterior cingulate gyrus and entorhinal cortex on the left and on the right in the parahippocampal gyrus. CONCLUSION: Our study demonstrates asymmetries in different cortical regions of the temporal lobe that can be used as another marker in the postmortem diagnosis of AD.
- MeSH
- Alzheimerova nemoc patologie MeSH
- cingulární gyrus patologie MeSH
- fluoresceiny metabolismus MeSH
- funkční lateralita fyziologie MeSH
- lidé středního věku MeSH
- lidé MeSH
- mapování mozku * MeSH
- počet buněk MeSH
- pyramidové buňky patologie MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- spánkový lalok patologie MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Predné cingulum bolo v rámci limbického systému primárne považované za štruktúru zodpovednú za emócie. Na základe nálezov novších neurozobrazovacích metód, štúdiom cytoarchitektúry a konektivity bola popísaná funkčná i morfologická variabilita celého cingula ako aj jednotlivých subregiónov. V článku sa venujeme najprv tejto variabilite a následne uvádzame prehľad nálezov štrukturálnej magnetickej rezonancie predného cingula pacientov s diagnózou schizofrénie.
Anterior cingulate cortex, a subregion of the cingulate gyrus and the dorsal component of the limbic lobe, has a major role in most theories of emotions. Based on cytoarchitectural and connectivity studies, cingulate functional and morphological heterogeneity was described. MRI findings support this approach. We discuss the functional and morfological variability of anterior cingulate cor tex in our article. There is also a brief review of MRI findings of the anterior cingulate cortex in chronic schizophrenia patients as well as first episodes and ultra – high risk patients in conclusion.
Decreased volumes of subgenual cingulate (SGC) have been reported primarily among familial bipolar patients, which is one of the hallmarks of an endophenotype. In order to investigate specificity of SGC volume abnormalities to familial mood disorders and to test whether SGC volumes represent an endophenotype for BD, we measured SGC volumes in young affected and unaffected relatives of bipolar patients (high-risk design) and in sporadic bipolar patients. We included 20 unaffected, 15 affected offspring of bipolar I or bipolar II parents, 18 controls, and 19 sporadic bipolar patients between 15 and 30 years of age. SGC volumes were measured on 1.5 T 3D anatomical MRI images using standard methods. We also combined the effect sizes from all published studies of sporadic patients with mood disorders (N = 61) and controls (N = 84) using random-effect models. We found comparable SGC volumes among unaffected, affected offspring of BD parents and controls (F = 0.7, df = 2; 50, P = 0.47). Likewise no SGC abnormalities were found between sporadic bipolar and control subjects (F = 2.31, df = 1; 34, P = 0.14). When combining all available data from sporadic patients, there were no differences in left (SDM 0.19, 95% CI -0.13 to 0.51) or right (SDM -0.11, 95% CI -0.47 to 0.26) SGC volumes between sporadic bipolar patients and controls. The limitations of the study are cross-sectional design and inclusion of both bipolar I and bipolar II probands. In conclusion, SGC volume abnormalities were absent in unaffected, affected relatives of bipolar patients as well as sporadic bipolar patients and thus did not meet criteria for endophenotype.
- MeSH
- analýza hlavních komponent MeSH
- analýza rozptylu MeSH
- bipolární porucha * patologie psychologie MeSH
- cingulární gyrus * patologie MeSH
- dítě postižených rodičů * psychologie statistika a číselné údaje MeSH
- dospělí MeSH
- funkční lateralita MeSH
- lidé MeSH
- magnetická rezonanční tomografie metody MeSH
- mladiství MeSH
- mladý dospělý MeSH
- počítačové zpracování obrazu metody MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- práce podpořená grantem MeSH
We report on a case of frontal lobe epilepsy in an eight-year-old girl. Seizure semiology and EEG indicated an epileptogenic zone localized in the mesial frontal structures, without clear-cut lateralization. MRI showed a lesion in the right cingulate gyrus, initially regarded as a hamartoma. Ictal SPECT did not have a localization value. MR spectroscopy revealed two metabolic abnormalities: one in the area of the MRI lesion and a second contra-laterally. Invasive monitoring using subdural electrodes covering the convexity and mesial part of the right frontal lobe including mesial strips with bilateral contacts was used. The invasive monitoring failed to localize ictal onset in the right hemisphere; however, electric stimulation induced seizures from electrodes facing the left supplementary sensorimotor area ("through" the falx cerebri). We re-implanted the electrodes over the left frontal lobe and the second invasive monitoring clearly localized the ictal onset zone in the left supplementary sensorimotor area, which was subsequently resected. Histopathology found MRI-negative focal cortical dysplasia. The contralateral lesion was reassessed as nonspecific enlargement of perivascular spaces. The patient has been seizure-free for more than two years.[Published with video sequences].
- MeSH
- cingulární gyrus patologie MeSH
- dítě MeSH
- elektroencefalografie MeSH
- epilepsie čelního laloku chirurgie patologie MeSH
- financování organizované MeSH
- implantované elektrody MeSH
- lidé MeSH
- magnetická rezonanční spektroskopie MeSH
- magnetická rezonanční tomografie MeSH
- motorické korové centrum patologie MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
