Structural organization of nonspecific thalamic nuclei and their projection toward cortex.
Explore the source record for details and available documents.
Biomedical subjects
Publications and source records attributed to A B Scheibel.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Despite an enormous number of variables, both genetic and epigenetic, most neuronal systems eventually show age-related changes. Although no simple description is possible because of the age, species, locus and state specificities of these alterations, the robust metabolic-synthetic load carried by most neurons is eventually reflected in the regressive changes shown by increasing numbers of them. Nonetheless, their remarkable capacity for selective dendritic and spine growth into the period of advanced old age underlines the biological resiliency built into these post-mitotic elements.
A group of alterations in the structure of cortical microvessels is described in the brain tissue of neuropathologically confirmed patients with Alzheimer's disease. These changes include irregular thickening of the vessel walls, infiltration with amyloid and the serum P component of amyloid, loss of the perivascular neural plexus and the frequent occurrence of pits and lacunae in vessel walls. The possibility that these alterations may be related to blood brain barrier defects is suggested.