[Alpha band coherence analysis of EEG in healthy adult's and Alzheimer's type dementia patients]. / Estudo da coerência do eletrencefalograma para a banda de frequência alfa em indivíduos adultos normais e com provável demência do tipo Alzheimer.

We studied the occipital inter-hemispheric coherence (IHCoh) of EEG (electrodes O1-O2) for alpha band (alpha1 - 8,0 to 10,0 Hz and alpha2 - 10,1 to 12,5 Hz) in healthy adults and Alzheimer's type dementia (ATD) subjects, to observe if there is any significant difference between these two groups that could help in the early diagnosis of ATD. We found a decrease of occipital IHCoh in ATD group for both alpha sub-bands. We believe that Coh analysis of EEG is a powerful auxiliary method in ATD diagnosis.

[Ocular myopathy, Kiloh-Nevin type; study of a case with histochemical and ultrastructural changes]. / Miopatia ocular tipo Kiloh-Nevin; estudo de um caso com alteracões histoquímicas e ultraestruturais.

A non-familiar case of Kiloh-Nevin ocular myopathy with important histochemical and ultrastructural abnormalities is reported. The patient, a 43 year-old male presented with 10 year long, pregressive ocular ophtalmoplegia, myasthenic symptoms and severe muscular pain, an uncommon finding in this type of myopathy. The histochemical study showed muscular atrophy, mainly in type I fibres and a great amount of ragged-red fibres. Of particular interest, in this case, was the ultrastructural finding of severe mitochondrial abnormalities with a lot of inclusions in the cristae matrix; nevertheless these changes are not specific. The authors suggest a possible abnormality in the neuro-muscular transmission system and a genetically controlled enzimatic factor as responsible for the aethiology and pathogenesis of the Kiloh-Nevin ocular myopathy.

"Hallervorden-Spatz syndrome--infantile neuroaxonal dystrophy" complex. Case report.

Case report of a 7 1/2-year-old girl considered as being normal until the age of 2 years. From then on she progressed with gait disturbance, mental deterioration, dystonic movements, convulsions and dysarthria. She died of bronchopneumonia one year later. CT scan showed hyperdensity at the putamen, with no signs of cerebral atrophy. Pathological examination disclosed an intense red coloration of the putamen and axonal "spheroids" at electron microscopy.

Hallervorden-Spatz syndrome: infantile neuroaxonal dystrophy' complex: case report

A síndrome de Hallervorden-Spatz bem como a distrofia neuroaxonal infantil säo patologias raras e os limites entre ambas säo ainda imprecisos. Apresentamos o caso de menina de 7 anos e meio com rebaixamento mental, distonia, crises convulsivas e coriorretinite. CT mostrava hiperdensidade dos putâmens, sem sinais de atrofia cerebral. Ao exame anatomopatológicos observou-se intensa coloraçäo avermelhada dos putâmens, porém com ausência de pigmento férrico. A microscopia eletrônica foram observados os <> axonais. Por haver características de ambas as patologias, registramos este caso, como complexo <>