Starting from models of working memory and hypertext navigation, this research focused on how the specific demands of hypertext systems could be adapted to fulfill the memory peculiarities of deaf signer users. We manipulated the Verbal and Visuospatial storage demands of a hypertext information retrieval task. The results showed that differences in accuracy, response time, and lostness between...

Theta-gamma phase coupling and spike timing within theta oscillations are prominent features of the hippocampus and are often related to navigation and memory. However, the mechanisms that give rise to these relationships are not well understood. Using high spatial resolution electrophysiology, we investigated the influence of CA3 and entorhinal inputs on the timing of CA1 neurons. The theta-ph...

One overarching research question in cognitive science concerns how information from perception and memory is processed and integrated in order to achieve robust, efficient, and adaptive behaviour in space, as is necessary in wayfinding. Examining this integration is quite complicated, entailing an understanding of learning strategies, spatial memory representations of static and dynamic relati...

Effective data management is crucial for interactive multimedia applications due to the large amount of data that need to be processed on-line. When the size of a 3D virtual world is larger than the available physical memory of a display client, we need to proactively maintain useful data in the memory for immediate or future graphics rendering. Traditional page-based data management scheme bec...

The development of place and cue spatial navigation was evaluated in 18-, 19-, and 20-day-old males in the Morris water task (MWT). Past work has suggested that place and cue learning develop at different rates, suggesting that the two aspects of spatial navigation have different neural substrates. In the present study, a new training methodology was used in which animals received spaced traini...

Abstract: ِIntroduction: The effect of morphine dependency on learning and spatial memory is controversial. So in this study effect of co-administeration of nitric oxide (NO) and morphine in CA3 of hippocampus on learning and spatial memory in morphine dependent rats was investigated. Methods: After anaesthetization of male rats, cannulae implanted bilaterally in CA3 of hippocampus. After reco...

Spatial representations and walking speed in rodents are consistently related to the phase, frequency, and/or amplitude of θ rhythms in hippocampal local field potentials. However, neuropsychological studies in humans have emphasized the importance of parietal cortex for spatial navigation, and efforts to identify the electrophysiological signs of spatial navigation in humans have been stymied ...

The ability to navigate in a familiar environment depends on both an intact mental representation of allocentric spatial information and the integrity of systems supporting complementary egocentric representations. Although the hippocampus has been implicated in learning new allocentric spatial information, converging evidence suggests that the posterior parietal cortex (PPC) might support egoc...

The abilities of both spatial orientation and spatial memory play very important roles in human navigation and spatial cognition. Since such abilities are difficult to strengthen through books or classroom instruction, there are no particular curricula or methods to assist in their development. Therefore, this study develops a spatial treasure-hunting game to enhance learners' spatial orientati...