Disseminated encephalomyelitis in children and its differential diagnosis from multiple sclerosis

Acute disseminated encephalomyelitis (ADEM) has been studied in a series of 30 children (16 girls, 14 boys) who ranged from 1.5 to 15 years old versus 24 pediatric patients (12 girls, 9 boys) aged 4-15 years with diagnosed disseminated sclerosis (DS). Conducted in the above series were the following investigations: computerized tomography, magnetic resonance imaging, recording of visual evoked potentials, indices for cellular and humoral immunity. ADEM, as distinct from DS, was marked by: an acute onset; the presence of general infectious symptoms together with general cerebral ones; involvement into the process of not only white matter but also of nuclear formations and peripheral nervous system; unidirectional course resulting in residual events. In 16 children a clear distinction was seen between ADEM and DS, while the rest of this pediatric population (n = 14) who had residual events presenting as pyramidal syndrome, might well develop DS in later life. Additional differential-diagnostic tests employed in the above study were found to be of little informative value.     

Mathematical Models of Block Media in Problems of Geomechanics. Part II: Consideration of the Transverse Block Deformations

The mathematical models are constructed for the elastic and elastoplastic deformation of a block rock mass. Of principal importance is to determine the mechanisms of block deformation. The solutions of problems on mine working in block massif and on rigid punch indentation are considered.