Showing papers in "Cognitive Brain Research in 1998"

TL;DR: An analysis of all reported human functional neuroimaging studies plotted onto a standardized brain found no evidence for a dorsal/ventral subdivision of prefrontal cortex depending on the type of material held in working memory, but a hemispheric organization was suggested (i.e., left-nonspatial; right-spatial).

TL;DR: A psychological model of duration discrimination that differentiates the speed of an internal clock used for the registration of current sensory input from the speedOf the memory-storage process used forThe representation of the durations of prior stimulus events has proven useful in integrating these findings.

TL;DR: A computer-generated virtual environment is used to study sex differences in human spatial navigation and reveals that females rely predominantly on landmark information, while males more readily use both landmark and geometric information.

TL;DR: It is argued that one important prerequisite for linking the neural mechanisms reflected in change-related brain waves to behavioral distraction effects may be regarded as fulfilled.

TL;DR: Findings support the hypothesis that neocerebellar regions subserve a central timing mechanism, whereas the prefrontal cortex subserves supportive functions associated with the acquisition, maintenance, monitoring and organization of temporal representations in working memory.

TL;DR: A source analysis indicated that the source current densities for the SSVEP attention effect had a focal origin in the contralateral parieto-occipital cortex.

TL;DR: Functional magnetic resonance tomography analysis of unimanual and bimanual sequential movements in righthanders showed the following effects: a rate-dependent activation of the somato-motor cortex was confirmed, with faster movement rates producing higher activation both in terms of signal intensity and number of activated voxels.

TL;DR: The data show how visually evoked brain activity is modulated by the meaning of the stimuli at early processing stages without reflecting hemispheric differences.

TL;DR: The results support previous findings that target/standard stimulus context determines P3a generation for both auditory and visual stimulus modalities and suggest that the distinctiveness of the eliciting stimulus contributes to P 3a amplitude.

TL;DR: The present findings indicate a hemispheric asymmetry in cerebral activation during local/global processing and provide robust evidence of a sensory precedence of global information.

TL;DR: Results showed that the position of the subjective middle was dependent upon the scanning direction of the line for all the subjects, and emphasize the role of scanning direction in space organization.

TL;DR: The results lend insight into the connection between visual perception and motor control, suggesting that people analyze human arm movements largely by tracking the hand or the end-point, even if the movement is performed with the entire arm.

TL;DR: The findings suggest that the somatosensory change-related positivity is probably generated not by activation of new afferent elements but by a detection of change in a process of comparison with sensory memory.

TL;DR: Evidence for domain-specific lexical regions in left middle, right middle and inferior frontal areas, as well as in superior and middle temporal areas is revealed, corroborate neuropsychological data and demonstrate directly and non-invasively in human volunteers that semantic representations in frontal and temporal areas are, to some degree, localized and possibly implemented as multiple maps.

TL;DR: It is suggested that in handedness recognition, left- handers relied more on a pictorial hand representation, whereas right-handers reliedMore on a pragmatic hand representations, probably derived from experience in the control of their own movements.

TL;DR: It is suggested that the left occipitotemporal LG/FG mediates the neural function that subserves the specific visual word processing and/or general analysis of complex graphical features of visual forms.

TL;DR: In a visual task selectively supported by central vision, visual processes of the congenitally deaf are more efficient when the task involves the contribution of serial processes.

TL;DR: The results showed that 300 mg/kg glucose enhanced the primacy effect as defined by the recall of the first five items of the lists, suggesting that glucose acts on precise memory operations.

TL;DR: Findings suggest that left posterior prefrontal cortex is important for the categorization and selection processes required by lexical-semantic tasks, and may modulate the neural generators in posterior cortical regions that are critical for priming.

TL;DR: The results suggest that the primary auditory cortex plays a main role in the auditory selective attention starting as early as 100 ms after the stimulus presentation.

TL;DR: The ERP data indicate that updating requires processes not suggested by Morris and Jones' behavioural studies; possibly control processes engaged to reduce the effects of proactive interference, consistent with the discovery of an ERP correlate of central executive activity.

TL;DR: How a novel recurrent architecture encodes the interaction of temporal and serial structure is demonstrated and insight into related aspects of human sensori-motor sequence learning is provided.

TL;DR: It is suggested that visual emotional information of high positive valence and low arousal is a signal of nonthreatening and nonappetitive environment, which probably reduces the need for auditory change detection.

TL;DR: Event-related magnetic fields were recorded from the left hemisphere in nine normal volunteers in response to four consonant-vowel syllables varying in voice-onset time, showing a displacement of the N1m peak equivalent current dipole toward more medial locations and an abrupt reduction in peak magnetic flux strength.

TL;DR: The increase in regional activation during the correlated condition suggests increased recruitment of neuronal populations occurs in response to textures containing visually salient features, also suggesting the presence of receptive field mechanisms in the ventral visual pathway that are sensitive to features produced by higher-order spatial correlations.

TL;DR: Amplitude changes in EEG responses to rapid, periodic visual stimulation during a behavioural task that required rapid, repetitive shifts in visual spatial attention are analysed and it is suggested that they may reflect orienting to a target stimulus, and reoriented to a cued location.

TL;DR: The event-related brain potential was used to spatially and temporally map the brain areas active as a function of type of recall (semantic vs. episodic) and episodic retrieval mode (recall vs. recognition) while difficulty of episodic recall was manipulated.

TL;DR: Theories about the direction specificity in perceptual learning of motion discrimination are taken issue, and human subjects improved faster in the direction with less frequent trials, indicating that learning transferred from the more frequent to the less frequent direction.

TL;DR: The main effect of increasing memory load was a 'negative amplitude shift' which was seen between 315 and 525 ms for auditory stimuli and between 210 and 472 ms for visual stimuli and could be distinguished from other ERP features that were sensitive to stimulus modality.

TL;DR: The changes of the somatosensory evoked potentials (SEPs) following median nerve stimulation in Go/No-go choice-reaction time task suggested that the attenuation of N20 was linked with the activation of the motor cortex followed by the actual movement.