To investigate brain substrates of spatial memory, neuronal expression of c-Fos protein was studied. Two groups of rats were trained in two spatial memory tasks in the Morris water maze, where the rats have to apply a reference memory rule or a working memory rule. In addition to the experimental groups, two control groups were used to study c-fos activation not specific to the memory processes...

Researchers have begun to delineate the precise nature and neural correlates of the cognitive processes that contribute to motor skill learning. The authors review recent work from their laboratory designed to further understand the neurocognitive mechanisms of skill acquisition. The authors have demonstrated an important role for spatial working memory in 2 different types of motor skill learn...

Recent empirical and theoretical work has depicted a close relationship between visual attention and visual working memory. For example, rehearsal in spatial working memory depends on spatial attention, whereas adding a secondary spatial working memory task impairs attentional deployment in visual search. These findings have led to the proposal that working memory is attention directed toward i...

Four dual-task experiments examined visuospatial, articulatory, and central executive working memory involvement during the development and application of spatial mental models. In Experiments 1 and 2 participants read route and survey spatial descriptions while undertaking one of four secondary tasks targeting working memory components. Converging evidence from map drawing and statement verifi...

Patients with phonologic alexia show impaired pseudoword (PW) reading, and frequently are impaired in reading functors and words with affixes. Phonological alexia has been attributed to a disturbance in the orthography to phonology reading route. Alternatively, it has been hypothesized that the deficit is one of phonologic processing not specific to reading, consistent with the frequent concomi...

Introduction: The Widespread range of mobile phone application in life has induced many problems in the societies. This subject has caused jammer router is used in some places. Jammer router blocks signal transfer from base station to the cell phone. In the other hand, the extensive application of electromagnetic field in all aspect of life has increased fears and worries about...

conclusions the performance of working memory improved through training, and these trainings extended to other areas of cognition functions not receiving any training. trainings resulted in the improvement of performance in the tasks related to prefrontal area. they had also a positive and significant impact on the movement activities of hyperactive children. results training of working memory ...

Examinations of interference between visual and spatial materials in working memory have suggested domain- and process-based fractionations of visuo-spatial working memory. The present study examined the role of central time-based resource sharing in visuo-spatial working memory and assessed its role in obtained interference patterns. Visual and spatial storage were combined with both visual an...

We have shown previously that psychological stress (predator exposure) impairs spatial memory in rats. We have extended that finding here to show that predator stress selectively impaired recently acquired (hippocampal-dependent) spatial working memory without affecting long-term (hippocampal-independent) spatial reference memory. We also investigated why predator exposure impairs memory. Was s...

Corticosterone (CORT), the predominant glucocorticoid in rodents, elevated for 21 days damages hippocampal subregion CA3. We tested the hypothesis that CORT would impair spatial memory, a hippocampal function. In each of the three experiments, rats received daily, subcutaneous injections of either CORT (26.8 mg/kg body weight in sesame oil) or sesame oil vehicle alone (VEH). CORT given for 21 o...