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Biomedical subjects

E Perret

Publications and source records attributed to E Perret.

8 recordsLinked to original sources
PubMed1977

Auditory and visual perception of simultaneous verbal and nonverbal stimuli.

In an auditory experiment, digits and tonal sequences were presented simultaneously to both ears. In a visual experiment, words and nonsense figures had to be compared in both visual half-fields. The verbral stimuli were better reported from the right ear and right visual half-field. The nonverbal stimuli were reported equally well from both ears and visual half-fields. It appears that the processing of stimuli presented to both input channels depends on the type of the stimuli. These results point to a cerebral mechanism classifying incoming information to the brain and yielding an optimal processing of verbal and nonverbal stimuli by the cerebral hemispheres.

Acoustic Stimulation↗
PubMed1977

[Neuropsychological diagnosis and localization of brain lesions: their agreement with other examination visits (author's transl)].

Neuropsychological diagnoses were compared with those of clinical examination and the results of electro- and pneumoencephalography, angiography, brain-scan and with the final diagnoses in a random sample of 319 patients. A significant correspondence between neuropsychological findings and final diagnosis was found. The agreements were closer for the side than for the lobe of damage. The results indicate that the neuropsychological assessment usefully supplements other neurological methods in the diagnosis and localization of brain-damage.

Brain Diseases↗
PubMed1976

[Neuropsychological examinations in childhood].

Three groups of children aged 8-12 years have been investigated by a test battery to gain insight into the problems surrounding the relationship between cerebral and behavioral development. One group was of children with circumscribed cortical lesions, one was a group of dyslexics with neurologic anomalies, and the third was a control group of children without brain lesions. General test intelligence did not differ significantly in the three groups. Marked differences between the various lesion groups are observable in some tests but not in others. For example, the results of children with left temporal lesions in the verbal part of the intelligence test and in fresh language memory were inferior to those of all other lesion groups and the controls, while the dyslexics showed a similar if less marked deficit. Non-linguistic (figural) memory did not differ as between groups. On the other hand, children with right frontal lesions were notable for inferior results in a visual learning test and a classification test. In a linguistic-dichotic test all the groups of brain lesions and the dyslexics differed from the control group, a fact which suggests retarded development of hemispheric dominance for speech functions. From these provisional results it can be concluded that the brain areas do not all specialize simultaneously, and that compensation of cerebral lesions in relation to different functions probably results in retardation of overall brain development and anatomico-functional specialization.

Age Factors↗