Showing papers in "Neuropsychologia in 1992"

TL;DR: Analysis of the errors made by each patient across the different tests, revealed a significant correspondence between the individual items, offering compelling evidence that the semantic breakdown in DAT is caused by storage degradation.

TL;DR: Six patients with progressive focal dementia or progressive aphasia showed impairments in knowledge of word meaning ranging from moderate to very severe, and a test of oral word reading demonstrated preserved reading of words with regular spelling-to-sound correspondences, but impaired reading of Words with atypical correspondences.

TL;DR: The results confirm a decrease with age in the prevalence of sinistrality, but indicate that age-specific rates of mixed- and left-handedness are distinct, which is a large-scale confirmation of a previously described phenomenon.

TL;DR: There is a substantial attentional effect upon judgements of extent, whereby paying less attention decreases perceived relative line length, however the constant error and the effect of spatial location may also be partly determined by premotor orienting biases caused by differential hemispheric activation.

TL;DR: It is suggested that non-target responses in simple oddball paradigms should be routinely studied along with target responses in order to improve the diagnostic capabilities of cognitive ERPs.

TL;DR: An extensive neuropsychological assessment demonstrates the absence of cognitive impairments in visuo-spatial processing and confirms the selective presence of a severe representational deficit of the left side of the body.

TL;DR: The present study of a subject with left visual neglect compared left hand finger movement with an instruction to visually anchor perception on the left arm during letter cancellation with only the finger movements significantly reduced neglect.

TL;DR: Findings suggest that an intact cerebellum is important for normal cognitive functions in patients with cerebellar degeneration.

TL;DR: Although the (non-Korsakoff) amnesic patients performed similarly to normal subjects on most measures, a finer analysis suggested that successful performance on this complex sorting task, in addition to being strongly dependent upon frontal lobe function, is mildly dependent upon memory function.

TL;DR: A dominant role for the right hemisphere is suggested in the perception of lexically-based emotional stimuli in right-handed adults, with RBDs showing a significantly greater performance discrepancy between emotional and nonemotional conditions.

TL;DR: Findings support the view that a broader range of related meanings is activated during word recognition in the right, than in the left, hemisphere, and help clarify the role of dominance in semantic priming.

TL;DR: It is suggested that neural structures fed by the left eye are better at processing and/or storing of visual information which allows recognition of individual conspecifics which is part of a wider tendency to respond to small changes in any of a variety of intrinsic stimulus properties.

TL;DR: The phenomenon of semantically-bounded anomia in relation to the issues of local vs distributed representation, the existence of semantic "maps" in the brain, and the implementation of arbitrary associations in neural networks is discussed.

TL;DR: Overall, PD patients were able to form more semantic clusters than phonemic clusters, and these results are discussed in light of other studies of verbal fluency deficits in patients with PD.

TL;DR: The results indicated that each of these manipulations of complexity influenced performance by making it more advantageous to have both hemispheres involved in processing rather than just one.

TL;DR: It is suggested that reactive and self- paced responses are produced through two different control modes and that afferent information contributes to the timing of motor commands in the self-paced mode.

TL;DR: It was concluded that further studies of sex differences in math achievement should consider subgroup differences within the sexes, based on handedness patterns.

TL;DR: The aged group was impaired on both types of memory, revealing signs of HPC and PFC dysfunction, consistent with previous findings that implicated the HPC in episodic memory and the PFC in working memory.

TL;DR: Eye-movements were recorded as patients with visual neglect searched in a completely darkened room to determine whether any light was present, showing that neglect patients have a bias to look to the right which is independent of the difficulty they have in processing sensory information in the left visual field.

TL;DR: It is concluded that threatening stimuli prime the right hemisphere and can alter predicted laterality patterns and result in a selective enhancement of left visual-field performances.

TL;DR: The apparently selective image generation deficit for shapes of objects could be a sequel of loss of knowledge about visual attributes of objects, if superior performance on shape recognition tasks was afforded by perceptual entry level representation which enable a rapid identification of objects but are inaccessible to introspective consciousness.

TL;DR: A main prediction was made that patients with neglect would show a significant increase in reaction time to contralateral visual stimuli in the presence of bilateral reference boxes as compared to conditions in which no boxes were displayed, and this prediction was confirmed in right brain-damaged patients with moderate to severe neglect.

TL;DR: Five distinct handedness groups were recognized by this procedure and a Discriminant Function Analysis revealed a very high accuracy of assigning individuals to the five groups.

TL;DR: Using regional cerebral blood flow (rCBF) imaging, two populations having high and low imagery abilities were compared at rest and while performing two cognitive tasks: silent verb conjugation and mental imagery.

TL;DR: The performance of patients with either anterior right (RT) or left (LT) temporal lobectomy was impaired in learning and delayed recognition of both melodies and words, as compared to normal control subjects, although some preserved learning over successive trials was observed.

TL;DR: Patients with unilateral frontal- or temporal-lobe excisions and control subjects performed a cognitive risk-taking task in which target items had to be guessed on the basis of partial-information clues, and patients with frontal-l lobe lesions demonstrated impulsive behaviour when manual responses were required.

TL;DR: Further investigations of the retrograde amnesia in a single case of R.F.R. became globally amnesic following an attack of Herpes Simplex Encephalitis.

TL;DR: Results suggest that recognition performance in the left hemisphere was more strongly influenced by the expectations for actions common to a scene than the right hemisphere and provide evidence that theleft hemisphere superiority in interpretation and inference effect memory performance.