Zobrazovací metody stále více přispívají k přesnější a časnější diagnostice neurodegenerativních onemocnění. Snahou je objevit citlivější biomarkery, které by umožnily kromě časnější diagnostiky také stratifikaci rizika rozvoje a prognózu neurodegenerativních onemocnění. Existuje celé spektrum přístupů od nukleární medicíny (SPECT, PET) přes MRI až po elektrofyziologii (EEG). V naší přehledové práci jsme se snažili shrnout poznatky o využití těchto technik a o charakteristických nálezech, které přispívají k diagnostice nejčastějších typů degenerativních demencí a jejich variant. Některé z těchto poznatků jsou zatím na vědecké úrovni, ale mnohé se již plně uplatňují v klinické praxi.
There has been a great development in imaging methods and their use for early diagnosis of neurodegenerative disorders. The aim is to discover more sensitive biomarkers that would enable early stratification of dementia subtypes and disease prognosis. There are various types of imaging methods such as nuclear medicine (SPECT, PET), MRI and electrophysiology (EEG), which provide complementary picture about degenerative diseases. The main purpose of this work is to review the most typical findings in neurodegenerative dementia and their most common variants and subtypes. Although some of them are suitable only for scientific purposes, many have been utilized in diagnostic guidelines.
- MeSH
- biologické markery analýza MeSH
- demence diagnostické zobrazování klasifikace MeSH
- diagnostické zobrazování * klasifikace metody MeSH
- elektroencefalografie metody MeSH
- lidé MeSH
- magnetická rezonanční tomografie metody MeSH
- neurodegenerativní nemoci * diagnostické zobrazování klasifikace MeSH
- neurofyziologický monitoring klasifikace metody MeSH
- PET/CT metody MeSH
- SPECT/CT metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- práce podpořená grantem MeSH
- přehledy MeSH
- Publikační typ
- abstrakt z konference MeSH
Zobrazení pomocí metod nukleární medicíny u neurodegenerativních onemocnění umožňuje hodnotit funkční charakteristiky různých oblastí CNS. V diagnostice extrapyramidových onemocnění mají nezastupitelné místo DaT scan a MIBG, které jsou zaměřeny na diferenciální diagnostiku parkinsonismu. U kognitivních poruch má výjimečnou pozici zobrazení beta amyloidu pomocí PET. FDG PET má význam především ve výzkumu.
Methods of nuclear medicine enable functional neuroimaging of various brain structures in neurodegenerative diseases. DaT scan and MIBG play a key role in differentials diagnosis of parkinsonian syndromes, in the field of movement disorders. Beta-amyloid PET imaging has a unique position in imaging of cognitive disorders. FDG PET is currently a method with predominantly research applications.
- MeSH
- Alzheimerova nemoc diagnostické zobrazování diagnóza MeSH
- amyloidní beta-protein MeSH
- demence s Lewyho tělísky diagnostické zobrazování diagnóza MeSH
- jednofotonová emisní výpočetní tomografie metody MeSH
- lidé MeSH
- neurodegenerativní nemoci * diagnostické zobrazování diagnóza MeSH
- Parkinsonova nemoc diagnostické zobrazování diagnóza MeSH
- pozitronová emisní tomografie metody MeSH
- radioisotopová scintigrafie * metody MeSH
- Check Tag
- lidé MeSH
Background: Dance is a complex activity combining physical exercise with cognitive, social, and artistic stimulation. Objectives: We aimed to assess the effects of dance intervention (DI) on intra and inter-network resting-state functional connectivity (rs-FC) and its association to cognitive changes in a group of non-demented elderly participants. Methods: Participants were randomly assigned into two groups: DI and life as usual (LAU). Six-month-long DI consisted of supervised 60 min lessons three times per week. Resting-state fMRI data were processed using independent component analysis to evaluate the intra and inter-network connectivity of large-scale brain networks. Interaction between group (DI, LAU) and visit (baseline, follow-up) was assessed using ANOVA, and DI-induced changes in rs-FC were correlated with cognitive outcomes. Results: Data were analyzed in 68 participants (DI; n = 36 and LAU; n = 32). A significant behavioral effect was found in the attention domain, with Z scores increasing in the DI group and decreasing in the LAU group (p = 0.017). The DI as compared to LAU led to a significant rs-FC increase of the default mode network (DMN) and specific inter-network pairings, including insulo-opercular and right frontoparietal/frontoparietal control networks (p = 0.019 and p = 0.023), visual and language/DMN networks (p = 0.012 and p = 0.015), and cerebellar and visual/language networks (p = 0.015 and p = 0.003). The crosstalk of the insulo-opercular and right frontoparietal networks were associated with attention/executive domain Z-scores (R = 0.401, p = 0.015, and R = 0.412, p = 0.012). Conclusion: The DI led to intervention-specific complex brain plasticity changes that were of cognitive relevance.
- Publikační typ
- časopisecké články MeSH
Dance is a complex sensorimotor activity with positive effects on physical fitness, cognition, and brain plasticity in the aging population. We explored whether individual levels of cognitive reserve (CR) proxied by education moderate dance intervention (DI)-induced plasticity assessed by resting-state functional connectivity (rs-FC) changes of the sensorimotor network (SMN), and between the dorsal attention network (DAN) and anterior default mode network (aDMN). Our cohort consisted of 99 subjects, randomly assigned to either a DI group who underwent a 6-month intervention (n = 49, Mage = 69.02 ± 5.40) or a control group (n = 50, Mage = 69.37 ± 6.10). Moderation analyses revealed that CR moderated DI-induced increase of the SMN rs-FC with significant changes observed in participants with ≥ 15 years of education (b = 0.05, t(62) = 3.17, p = 0.002). Only DI alone was a significant predictor of the DAN-aDMN crosstalk change (b = 0.06, t(64) = 2.16, p = 0.035). The rs-FC increase in the SMN was correlated with an improved physical fitness measure, and changes in the DAN-aDMN connectivity were linked to better performance on figural fluency. Consistent with the passive CR hypothesis, we observed that CR correlated only with baseline behavioral scores, not their change.
- MeSH
- kognitivní rezerva * MeSH
- kognitivní stárnutí * MeSH
- lidé středního věku MeSH
- lidé MeSH
- neuroplasticita * MeSH
- senioři MeSH
- tanec * MeSH
- terapie tancem MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
OBJECTIVES: To evaluate effects of a six-month intensive dance-exercise intervention (DI) on cognition and brain structure in a mixed group of healthy seniors and people with mild cognitive impairment. METHODS: Subjects (aged ˃ 60 years with no dementia or depression) were randomly assigned to either a DI group or a life as usual (LAU) group. Detailed neuropsychological testing, measures of physical fitness and brain MRI encompassing T1 structural and diffusion tensor imaging (DTI) were performed at baseline and after 6 months. We assessed changes in cortical thickness and DTI parameters derived from tract-based spatial statistics. RESULTS: Altogether 62 individuals (n = 31 in the DI group) completed the protocol. The groups were matched for their demographic and clinical variables. After 6 months, we found significant cortical thickening in the right inferior temporal, fusiform and lateral occipital regions in the dancers compared to controls. Significant increases of radial and mean diffusivity were observed in various white matter tracts in the dancers; however, no differences were observed between the DI and LAU groups. The DI group as compared to the LAU group showed subtle improvements in executive functions. CONCLUSIONS: We observed DI-induced improvement in executive functions and increases of cortical thickness in the lateral occipitotemporal cortex which is engaged in action observation, visuomotor integration and action imitation, that is activities that are all important for motor learning and executing skilled movements.
- MeSH
- difuzní magnetická rezonance MeSH
- kognice * MeSH
- lidé středního věku MeSH
- lidé MeSH
- mozek * MeSH
- neuropsychologické testy MeSH
- senioři MeSH
- tanec * MeSH
- terapie cvičením metody MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- randomizované kontrolované studie MeSH
Using multishell diffusion MRI and both tract-based spatial statistics (TBSS) and probabilistic tracking of specific tracts of interest, we evaluated the neural underpinnings of the impact of a six-month dance intervention (DI) on physical fitness and cognitive outcomes in nondemented seniors. The final cohort had 76 nondemented seniors, randomized into DI and control (life as usual) groups. Significant effects were observed between the DI and control groups in physical fitness measures and in attention. We detected associations between improved physical fitness and changes in diffusion tensor imagining (DTI) measures in the whole white matter (WM) skeleton and in the corticospinal tract and the superior longitudinal fascicle despite the fact that no significant differences in changes to the WM microstructure were found between the two groups.
- MeSH
- bílá hmota anatomie a histologie MeSH
- difuzní magnetická rezonance metody MeSH
- lidé středního věku MeSH
- lidé MeSH
- mozek anatomie a histologie MeSH
- počítačové zpracování obrazu MeSH
- senioři MeSH
- tanec * MeSH
- tělesná výkonnost * MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
18F-fluciclovine is a PET radiopharmaceutical used for the detection of recurrent prostate cancer in adult men after primary curative treatment with suspicion of recurrence based on elevated prostate-specific antigen level. Several incidental uptakes of 18F-fluciclovine in other tumour types have been described in the literature so far - in breast cancer, hepatocellular carcinoma, and malignant melanoma. Our case report presents a patient with oncological duplicity (prostate gland carcinoma and newly diagnosed neuroendocrine tumour) and with accumulation of fluciclovine in pathologically proved neuroendocrine tumour, later imagined also by octreotide SPECT/CT. To our knowledge, this is the first case of fluciclovine accumulated in a neuroendocrine tumour described in the literature.
- Publikační typ
- kazuistiky MeSH
Dementia with Lewy bodies (DLB) is the second most common cause of neurodegenerative dementia after Alzheimer's disease (AD). Although diagnosis may be challenging, there is increasing evidence that the use of biomarkers according to 2017 revised criteria for diagnosis and management of dementia with Lewy bodies can increase diagnostic accuracy. Apart from nuclear medicine techniques, various magnetic resonance imaging (MRI) techniques have been utilized in attempt to enhance diagnostic accuracy. This chapter reviews structural, functional and diffusion MRI studies in DLB cohorts being compared to healthy controls, AD or dementia in Parkinson's disease (PDD). We also included relatively new MRI methods that may have potential to identify early DLB subjects and aim at examining brain iron and neuromelanin.
Using MRI, a characteristic pattern of grey matter (GM) atrophy has been described in the early stages of Alzheimer's disease (AD); GM patterns at different stages of Parkinson's disease (PD) have been inconclusive. Few studies have directly compared structural changes in groups with mild cognitive impairment (MCI) caused by different pathologies (AD, PD). We used several analytical methods to determine GM changes at different stages of both PD and AD. We also evaluated associations between GM changes and cognitive measurements. Altogether 144 subjects were evaluated: PD with normal cognition (PD-NC; n = 23), PD with MCI (PD-MCI; n = 24), amnestic MCI (aMCI; n = 27), AD (n = 12), and age-matched healthy controls (HC; n = 58). All subjects underwent structural MRI and cognitive examination. GM volumes were analysed using two different techniques: voxel-based morphometry (VBM) and source-based morphometry (SBM), which is a multivariate method. In addition, cortical thickness (CT) was evaluated to assess between-group differences in GM. The cognitive domain z-scores were correlated with GM changes in individual patient groups. GM atrophy in the anterior and posterior cingulate, as measured by VBM, in the temporo-fronto-parietal component, as measured by SBM, and in the posterior cortical regions as well as in the anterior cingulate and frontal region, as measured by CT, differentiated aMCI from HC. Major hippocampal and temporal lobe atrophy (VBM, SBM) and to some extent occipital atrophy (SBM) differentiated AD from aMCI and from HC. Correlations with cognitive deficits were present only in the AD group. PD-MCI showed greater GM atrophy than PD-NC in the orbitofrontal regions (VBM), which was related to memory z-scores, and in the left superior parietal lobule (CT); more widespread limbic and fronto-parieto-occipital neocortical atrophy (all methods) differentiated this group from HC. Only CT revealed subtle GM atrophy in the anterior cingulate, precuneus, and temporal neocortex in PD-NC as compared to HC. None of the methods differentiated PD-MCI from aMCI. Both MCI groups showed distinct limbic and fronto-temporo-parietal neocortical atrophy compared to HC with no specific between-group differences. AD subjects displayed a typical pattern of major temporal lobe atrophy which was associated with deficits in all cognitive domains. VBM and CT were more sensitive than SBM in identifying frontal and posterior cortical atrophy in PD-MCI as compared to PD-NC. Our data support the notion that the results of studies using different analytical methods cannot be compared directly. Only CT measures revealed some subtle differences between HC and PD-NC.
- MeSH
- Alzheimerova nemoc diagnostické zobrazování patologie psychologie MeSH
- atrofie patologie MeSH
- hipokampus patologie MeSH
- kognice * MeSH
- kognitivní dysfunkce patologie MeSH
- kognitivní poruchy MeSH
- lidé středního věku MeSH
- lidé MeSH
- magnetická rezonanční tomografie MeSH
- mastektomie MeSH
- mozek patologie MeSH
- paměť MeSH
- Parkinsonova nemoc diagnostické zobrazování patologie psychologie MeSH
- šedá hmota diagnostické zobrazování 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
