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Biomedical subjects

C De Bonis

Publications and source records attributed to C De Bonis.

6 recordsLinked to original sources
PubMed1990

Double dissociation between temporal and spatial pattern processing in patients with frontal and parietal damage.

One hundred and twenty nine patients affected by a cerebral lesion confined to a single lobe, underwent a battery of tests including the "Temporal Rule Induction" (TRI) and the Raven's "Coloured Progressive Matrices" (CPM). Frontal patients scored lower than any other group on TRI and parietal patients on CPM. This contrasting pattern of performance provides strong empirical support to the hypothesis that the frontal lobe is specifically involved in tasks that require a control on temporally ordered information whereas the parietal lobe is concerned with cognitive activities that imply visuo-spatial analysis.

Adult↗
PubMed1989

Contralateral and ipsilateral tactile extinction in patients with right and left focal brain damage.

Heilman has suggested that right hemisphere lesions produce neglect both in the spaces contralateral and ipsilateral to the damaged hemisphere. To test this hypothesis, we studied the incidence of contralateral and ipsilateral tactile extinctions in 44 right and 59 left brain-damaged patients, by means of a standard test of a double tactile simultaneous stimulation of symmetrical and asymmetrical parts of the two sides of the body and of ipsilateral body parts. Results did not confirm Heilman's hypothesis; while contralateral tactile extinction was more frequent and severe in right than in left brain-damaged patients, no hemispheric difference was found when the number of ipsilateral extinctions was taken into account. Furthermore, ipsilateral tactile extinction was significantly related to aspecific factors (such as age, severity of sensorimotor impairment and widespread mental deterioration), irrespective of the hemispheric side of lesion.

Brain Diseases↗
PubMed1986

Constructive disabilities in focal brain-damaged patients. Influence of hemispheric side, locus of lesion and coexistent mental deterioration.

The performance of 185 focal brain-damaged patients on two non-verbal constructive tasks ('Copying Drawings' and 'Copying Drawings with Landmarks') was evaluated with regard to three variables: laterality of cerebral lesion, intrahemispheric locus of lesion, and coexistence of mental deterioration. The aim of the study was to assess the relationships between each of these variables and both the incidence and severity of constructional apraxia. Different evaluations were carried out in order to partial-out the possible interference of unilateral spatial neglect. Results showed that, regardless of whether faults attributable to unilateral spatial neglect were penalized or not: right brain-damaged patients performed slightly worse and showed a higher percentage of pathologic performances than left brain-damaged patients; subjects with parietal--and particularly with right parietal--damage obtained the poorest mean scores and exhibited the highest incidence of apraxic performances; and coexistence of mental deterioration was the most relevant variable associated with global decay of constructive scores and incidence of constructional apraxia.

Adult↗