RESUMEN
The recently extended imaging mode of dynamic Secondary Ion Mass Spectroscopy as well as its depth profiling variant were used to study three-dimensional structures in a phase-separating polymer blend film. Formation of layered morphology and its further reorganisation into columns were observed in a system confined by symmetric flat surfaces. The integral-geometry-based morphological image analysis provided a quantitative description of the evolution of the phase morphology.
RESUMEN
Neuropsychological and electroencephalographic investigations of 200 patients with tomographically confirmed brain atrophy failed to demonstrate significant differences in relation to control group of patients without this atrophy in whom CT was done for the same clinical indications as in the studied group. In both groups the results of neuropsychological investigations were correlated with age. In the EEG the only statistically significant difference was a greater frequency of seizure activity in the patients with brain atrophy.
Asunto(s)
Encéfalo/patología , Electroencefalografía , Pruebas Psicológicas , Adulto , Anciano , Anciano de 80 o más Años , Atrofia/complicaciones , Atrofia/diagnóstico , Atrofia/diagnóstico por imagen , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas , Convulsiones/etiología , Tomografía Computarizada por Rayos XRESUMEN
Computerized tomography of the head was done in 5021 patients aged 21 to 81 years from various neurological, neurosurgical and neurotraumatological indications. Brain atrophy as an only finding (primary) was noted in 11.5%- and in 5.4% of cases it was associated with other changes. The neurological-radiological correlations were established in 200 cases of primary strophy. History data included: headaches in 54.5%, dizziness in 15.0%, epilepsy in 24.5%. Objective examination showed: slight hemiparesis in 37.5%, spastic-atactic gait disturbances in 31.5%, isolated damage to the corticospinal tracts with signs limited to one side of the body was more frequent in cortical atrophy, and these signs associated with ataxia were more frequent in subcortional atrophy. The authors explain this as a loss of cortical cells or damage to the paraventricularly coursing nerve fibres. A probable aetiology of "primary" atrophy was established in 405% of cases (hypertension, atherosclerosis, minor craniocerebral trauma). No signs or neurological syndromes were observed which could be regarded as more or less characteristic of brain atrophy.