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Biomedical subjects

R Cubelli

Publications and source records attributed to R Cubelli.

24 records · Page 2Linked to original sources
PubMed1991

Different patterns of dissociation in unilateral spatial neglect.

The aim of this paper is to discuss the issue of dissociations found in unilateral spatial neglect according to the modality of space exploration and the nature of the task. For this purpose we present a reanalysis of the data from a recent paper of Gentilini et al. (1989) comparing visual and blindfolded exploration of a computer keyboard and discuss the performance of a left-brain-damaged patient with right visuospatial neglect and left-sided neglect dyslexia. We conclude that unilateral spatial neglect cannot be interpreted as a disruption of a single attentional mechanism, but rather it reflects impaired attentional mechanisms at several levels of cognitive processing.

Adult↗
PubMed1989

Selective spatial attention and length representation in normal subjects and in patients with unilateral spatial neglect.

The aim of this study was to assess whether perceptual representation along the horizontal axis is affected by hemispace position of the stimulus or by orienting attention to one side. Ten control subjects and 10 right brain damaged patients with left unilateral spatial neglect (USN) were asked to bisect lines of five lengths in three space positions (left, center, right) and under three cueing conditions (no cue, left cue, right cue). Normal controls showed significant displacement of bisection opposite to the side of hemispace presentation and toward the side of cueing. USN patients showed a bisection error toward the right end which increased with lines placed in the left hemispace and decreased with lines placed in the right hemispace and when attention was oriented toward the left side. We conclude that (1) In absence of cues normal subjects tend to overestimate the portions of space closer to their body midline; (2) both normal and USN patients tend to overestimate portions of space that they direct their attention to; (3) USN patients' performance without cueing is consistent with an attentional shift toward the right hemispace implying a gradient of overestimation of the right-most portions of space. A common neural substratum for directing attention and space representation can explain these findings.

Aged↗
PubMed1988

Reeducation strategies in conduction aphasia.

This article proposes a reeducation program for conduction aphasics with reproductive difficulties. The characteristics of the program are analysis and manipulation of visual stimuli (written words and syllables); suppression of the compensation effect of the spared lexical-semantic system; and progressive increase in length and complexity of phonological and syntactic construction of words and sentences. The aim of this program is to teach patients to control phonemic production. Results of the reeducation of three conduction aphasics are presented.

Aphasia↗
PubMed1984

Pain endurance in unilateral cerebral lesions.

The purpose of the present experiment was to study whether a unilateral cerebral lesion modifies pain parameters with respect to a control group. Electric stimuli were applied to brain damaged patients on the forearm ipsilateral to the lesion, and to both forearms of a control group. No significant difference was found between experimental groups for either pain or tolerance thresholds, whereas pain endurance--the difference between pain threshold and pain tolerance threshold--was significantly greater in right brain damaged patients, compared to both the control group and the left brain damaged group. In the latter group, pain endurance was not significantly different from controls, although there was a tendency towards its decrease. Result are discussed in relation to the problem of the hemispheric specialization for emotional processes.

Aged↗