Extremely low-frequency magnetic field (ELF-MF) has been suggested to influence the cognitive capability but this should be dynamically evaluated in a longitudinal study. Previous training can affect performance, but the influence under magnetic field is unclear. This study aims to evaluate the effects of previous training and ELF-MF exposure on learning and memory using the Morris water maze (MWM). Sprague-Dawley rats were subjected to MWM training, ELF-MF exposure (50 Hz, 100 μT), or ELF-MF exposure combined with MWM training for 90 days. Normal rats were used as controls. The MWM was used to test. The data show that the rats exposed to training and ELF-MF with training performed better on spatial acquisition when re-tested. However, during the probe trial the rats showed no change between the training phase and the test phase. Compared with the control group, the ELF-MF group showed no significant differences. These results confirm that previous training can improve the learning and memory capabilities regarding spatial acquisition in the MWM and this effect can last for at least 90 days. However, this improvement in learning and memory capabilities was not observed during the probe trial. Furthermore, ELF-MF exposure did not interfere with the improvement in learning and memory capabilities., Y. Li, C. Zhang, T. Song., and Obsahuje bibliografii
Cieľ štúdie. Analýza odstupňovania modifikovanej spätnej väzby v Dynamickom teste latentnej učebnej schopnosti pre 8 až 10 ročné deti (DTLUS 8-10). Súbor a postup výskumu. Výskumný súbor tvorili deti zo sociálne znevýhodňujúceho prostredia vo veku od 7 do 8 rokov a 6 mesiacov (N = 50), ktorým boli administrované jednotlivé stupne spätnej väzby izolovane. Hypotéza. Pri izolovanom poskytnutí jednotlivých rád z DTLUS 8-10, upravených na základe zásad poskytovania spätnej väzby v krátkodobých dynamických testoch, sa bude s vyšším stupňom jednotlivých rád zvyšovať aj počet správnych odpovedí. Štatistická analýza. Na zistenie rozdielov medzi jednotlivými radami z hľadiska počtu vyriešených a nevyriešených úloh bol zvolený chí-kvadrát test, v rámci ktorého boli pre každú úlohu porovnávané reálne frekvencie medzi odpoveďami pri jednotlivých dvojiciach rád. Výsledky. Preukázalo sa, že s vyšším stupňom spätnej väzby narastalo aj percento vyriešených úloh. Príspevok poskytuje overený návod na poskytovanie spätnej väzby v krátkodobých dynamických testoch. Obmedzenia štúdie. Výsledky sa vzťahujú len na 7 až 8 ročné deti zo sociálne znevýhodňujúceho prostredia., Goal of the study. Analysis of grading the modified feedback in Dynamic test of latent learning ability for 8 to 10 years old children (DTLUS 8-10). Sample and method. The research sample consisted of children from socially disadvantaged environment aging from 7 to 8 years and 6 months (N=50). The particular grades of feedback were administered to them separately. Hypothesis. In case of separate providing the particular sequences from DTLUS 8-10, adjusted on the basis of principles for providing the feedback in short-time dynamic tests, together with the higher grade of particular sequences the number of right answers will be also increasing. Statistical analysis. For assessing the differences between particular sequences in numbers of worked out and non-worked out tasks the chisquared test was selected. The real frequencies of answers in particular pairs of sequences were compared for every task. Results. It was proved that together with the higher grade of feedback the percentage of worked out tasks was increasing. The paper offers the verified instructions for providing feedback in short-time dynamic tests. Study limits. Results apply only to 7 to 8 years old children from socially disadvantaged environment., Vladimír Čema., and Obsahuje bibliografii a bibliografické odkazy
Cílem tohoto článku je popsat a kriticky reflektovat tři hlavní teoretické přístupy, kterými je v současné psychologii konstruován lidský potenciál k učení; autoři tyto přístupy souhrnně označují jako teorie nadání, teorie přípravy a teorie motivace. Autoři se v článku zabývají tím, na jakých základech jsou jednotlivé přístupy vystavěny, tedy z jakého teoretického rámce vycházejí a jaké metody používají. Ukazují také, jak jednotlivé přístupy k lidskému potenciálu zobecňují své závěry, a jak na tomto základě doporučují odlišné vzdělávací praktiky a nabízejí odlišné interpretace situací, se kterými se lidé mohou setkávat v průběhu vzdělávání. Závěrem argumentují, že jednotlivé přístupy mohou být nahlíženy z perspektivy kritické psychologie jako různé diskurzy lidské přirozenosti, které vycházejí z rozdílných ideologických perspektiv a jejichž závěry mohou vést ke zvýhodňování, nebo naopak znevýhodňování různých skupin studentů a studentek., The main aim of the article is to introduce and critically reflect on three theoretical approaches representing three different psychological constructions of human potential to learn; we label them theories of giftedness, theories of preparation, and theories of motivation. The authors focus on the ways in which the approaches have been construed and explore their philosophical and methodological background. Furthermore, the authors show how the approaches generalize their conclusions and on this basis recommend various educational practices and provide different interpretations of situations emerging in the educational context. Finally, the authors discuss that the approaches are a part of various discourses of human nature influenced by different ideological perspectives. In this way, their conclusions may favor or discriminate against various groups of students., Jiří Mudrák, Kateřina Zábrodská., and Obsahuje seznam literatury
During the early postnatal age environmental signals underlie the development of sensory systems. The visual system is considered as an appropriate system to evaluate role of sensory experience in postnatal development of sensory systems. This study was made to assess the effect of visual deprivation on strategy of arm selection in navigation of radial arm maze. Six-week-old light- (LR, control) and dark-reared (DR) rats were trained for correct choices and adjacent arms tasks. Our results showed that both the LR and DR animals equally selected correct arms. In the adjacent arms task, however, the control group significantly outperformed the DR animals. While the LR males and females displayed some differences in performing the tasks, no sex dependency was found in the performance of the DR group. These findings indicate that the lack of visual experience is likely to influence the strategy selection as well as sex differences. Thus the difference in the performance of LR and DR animals seems to be due to the male rather than female behavior., M. Salami., and Obsahuje bibliografii a bibliografické odkazy
Spatial navigation comprises a widely-studied complex of animal behaviors. Its study offers many methodological advantages over other approaches, enabling assessment of a variety of experimental questions and the possibility to compare the results across different species. Spatial navigation in laboratory animals is often considered a model of higher human cognitive functions including declarative memory. Almost fifteen years ago, a novel dry-arena task for rodents was designed in our laboratory, originally named the place avoidance task, and later a modification of this approach was established and called active place avoidance task. It employs a continuously rotating arena, upon which animals are trained to avoid a stable sector defined according to room-frame coordina tes. This review describes the development of the place avoidance tasks, evaluates the cognitive processes associated with performance and explores the application of place avoidance in the testing of spatial learning after neuropharmacological, lesion and other experimental manipulations., A. Stuchlík ... [et al.]., and Obsahuje bibliografii a bibliografické odkazy
Robotická rehabilitace chůze, která náleží mezi pokročilé rehabilitační technologie, původně vznikla jako modifikace terapie chůze na běžícím pásu při odlehčení v závěsném systému. V současnosti je k dispozici řada systémů pracujících na základě různých principů vč. mobilních asistivních exoskeletů. Neurofyziologický podklad této terapie je založen na míšní autonomii (centrální generátory vzorů), plasticitě centrálního nervového systému a motorickém učení. Z hlediska medicíny založené na důkazech je přínos této terapie zatím nejasný. Jednoznačným kladem je ulehčení fyzické práce terapeuta. Indikace proto musí vycházet z racionální úvahy., Robotic gait therapy, one of advanced rehabilitation technologies, originally evolved as a modification of the body weight-supported treadmill therapy. At present, a range of various systems based on different principles is available, including mobile assistive exoskeletons. Neurophysiological essence of this therapy is based on the spinal cord autonomy (central pattern generators), plasticity of the central nervous system and motor learning. With respect to the evidence-based medicine, benefits of this therapy are still unclear; unambiguously positive is the reduced physical burden on a therapist. Indications must, therefore, be based on a rational consideration. Key words: robotics – central pattern generators – plasticity – motor learning The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE “uniform requirements” for biomedical papers., and I. Vařeka, M. Bednář, R. Vařeková
Neurotransmitter substrate of spatial cognition belongs to current topics in behavioral neuroscience. The present study examined the effects of serotonin depletion with p-chlorophenylalanine on learning of rats in active place avoidance, a spatial task requiring allothetic mapping and cognitive coordination and highly dependent upon hippocampus. Serotonin depletion transiently increased locomotor activity in response to footshocks, but it did not change the avoidance efficiency measured by three spatial parameters. These results suggest that serotonin neurotransmission is not crucial for cognitive coordination and allothetic learning, i.e. the processes, which are crucial for active place avoidance performance., T. Petrásek, A. Stuchlík., and Obsahuje seznam literatury
Spatial navigation and memory is considered to be a part of the declarative memory system and it is widely used as an animal model of human declarative me mory. However, spatial tests typically involve only static settings, despite the dynamic nature of the real world. Animals, as well as people constantly need to interact with moving objects, other subjects or even with entire moving environments (flowing water, running stairway). Therefore, we design novel spatial tests in dynamic environments to study brain mechanisms of spatial processing in more natural settings with an interdisciplinary approach including neuropharmacology. We also translate data from neuropharmacological studies and animal models into development of novel therapeutic approaches to neuropsychiatric disorders and more sensitive screening tests for impairments of memory, thought, and behavior., A. Stuchlik ... [et al.]., and Obsahuje bibliografii a bibliografické odkazy