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An explorative study on media effects in vocabulary learning

100%
Giessen H.
Lublin Studies in Modern Languages and Literature
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2019
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vol. 43
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issue 4
DE
Der Band enthält die Abstracts ausschließlich in englischer Sprache.
EN
This article deals with the best media or media adequate ways to memorize vocabulary. An empirical study is presented in which test persons had to memorize vocabulary in an unknown language in three different ways. Thus, three experimental groups were presented Hungarian vocabulary to be learnt. The first group learnt a vocabulary list from a sheet of paper, the second one from the computer monitor, but without any animation, and the third one from an animated flash file. In the present article, the results of this study are reported and discussed.
FR
L'article contient uniquement les résumés en anglais.
2
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Mental imagery and spatio-temporal continuity: Evidence from the function of the hippocampal formation

88%
Kocsis A.
Avant
|
2019
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vol. 10
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issue 2
EN
The aim of this paper is to suggest a novel account of mental imagery according to which mental images are not a-temporal picture-like representations, but processes characterized by their spatio-temporal continuity. Evidence based in particular on recent advances in understating the functional role of the hippocampal formation in cognition and spatial coding is provided. Under this account, mental images are a pervasive form of cognition that is supported by the complex interaction of the hippocampus and the entorhinal cortex, encompassing cognitive functions such as navigation, episodic memory, as well as mental rotation and scanning. The functional role of the hippocampus is twofold: it forms elements of spatio-temporal continuity and re-combines them in novel ways in the process of scene reconstruction that underpins various forms of spatial cognition.
3
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Effects of benzo(a)pyrene exposure on the ATPase activity and calcium concentration in the hippocampus of neonatal rats

75%
Yang K., Chen C., Cheng S., Cao X., Tu B.
International Journal of Occupational Medicine and Environmental Health
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2017
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vol. 30
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issue 2
203-211
EN
Objectives To investigate whether postnatal benzo(a)pyrene (B(a)P) exposure caused the impairments on the process of neurodevelopment and the alteration in the calcium medium in the neonatal rats. Material and Methods Eighty neonatal Sprague Dawley (SD) rats were randomly divided into 5 groups (untreated control group, vehicle group, 0.02 mg/kg, 0.2 mg/kg and 2 mg/kg B(a)P-exposed group). Rats were treated with B(a)P by the intragastric administration from postnatal day (PND) 4 to 25. Morris water maze (MWM) was employed to observe the spatial memory of rats. The activity of calcium adenosine triphosphatase (Ca2+-ATPase), sodium-potassium adenosine triphosphatase (Na+-K+-ATPase) and calcium-magnesium adenosine triphosphatase (Ca2+-Mg2+-ATPase) in the hippocampus were detected by commercial kits. Fura-2 pentakis(acetoxymethyl) (Fura-2/AM) probe and reactive oxygen species (ROS) reagent kit were used for measuring the concentration of Ca2+ and ROS in the hippocampus synapse, respectively. Results Rats exposed to B(a)P resulted in the deficits in the spatial memory manifested by the increased escape latency and decreased number of crossing platform and time spent in target quadrant in comparison with the control groups. Benzo(a)pyrene exposure caused the significant decrease in the ATPase activity in the hippocampus and caused Ca2+ overload in the synaptic, besides, the ROS concentration increased significantly which may further induce neurobehavioral impairment of the neonatal rats. Conclusions Our findings suggest that postnatal B(a)P exposure may cause the neurobehavioral impairments in the neonatal rats, which were mediated by the decreased ATPase activity and elevated Ca2+ concentration. Int J Occup Med Environ Health 2017;30(2):203–211
4
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Evaluation of passive avoidance learning and spatial memory in rats exposed to low levels of lead during specific periods of early brain development

75%
Rao Barkur R., Bairy L. K.
International Journal of Occupational Medicine and Environmental Health
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2015
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vol. 28
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issue 3
533-544
EN
Objectives Widespread use of heavy metal lead (Pb) for various commercial purposes has resulted in the environmental contamination caused by this metal. The studies have shown a definite relationship between low level lead exposure during early brain development and deficit in children’s cognitive functions. This study investigated the passive avoidance learning and spatial learning in male rat pups exposed to lead through their mothers during specific periods of early brain development. Material and Methods Experimental male rats were divided into 5 groups: i) the normal control group (NC) (N = 12) consisted of rat offspring born to mothers who were given normal drinking water throughout gestation and lactation, ii) the pre-gestation lead exposed group (PG) (N = 12) consisted of rat offspring, mothers of these rats had been exposed to 0.2% lead acetate in the drinking water for 1 month before conception, iii) the gestation lead exposed group (G) (N = 12) contained rat offspring born to mothers who had been exposed to 0.2% lead acetate in the drinking water throughout gestation, iv) the lactation lead exposed group (L) (N = 12) had rat offspring, mothers of these rats exposed to 0.2% lead acetate in the drinking water throughout lactation and v) the gestation and lactation lead exposed group (GL) (N = 12) contained rat offspring, mothers of these rats were exposed to 0.2% lead acetate throughout gestation and lactation. Results The study found deficit in passive avoidance learning in the G, L and GL groups of rats. Impairment in spatial learning was found in the PG, G, L and GL groups of rats. Interestingly, the study found that gestation period only and lactation period only lead exposure was sufficient to cause deficit in learning and memory in rats. The extent of memory impairment in the L group of rats was comparable with the GL group of rats. Conclusions So it can be said that postnatal period of brain development is more sensitive to neurotoxicity compared to prenatal exposure.
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