TY - JOUR
T1 - Enlargement of synaptic size as a compensative reaction in aging and dementia
AU - Bertoni-Freddari, C.
AU - Fattoretti, P.
AU - Pieroni, M.
AU - Meier-Ruge, W.
AU - Ulrich, J.
PY - 1992
Y1 - 1992
N2 - A quantitative investigation has been carried out on synaptic contact zones of dentate gyrus supragranular layer and cerebellar glomeruli in autoptic samples from adult, old and demented patients. During physiological aging and senile dementia, the synaptic average area was significantly increased as compared to adult values in both the CNS areas investigated. Conversely, the number of contacts and their total surface contact area per unit volume of tissue were decreased. Current literature reports that, in animal models, enlarged synapses undergo perforations and splitting to modify synaptic connectivity. As against these assumptions, the increased synaptic size observed in our study appears to represent a compensative reaction of old and demented CNS to counteract the reduction in number and in total contact area of the synaptic junctions.
AB - A quantitative investigation has been carried out on synaptic contact zones of dentate gyrus supragranular layer and cerebellar glomeruli in autoptic samples from adult, old and demented patients. During physiological aging and senile dementia, the synaptic average area was significantly increased as compared to adult values in both the CNS areas investigated. Conversely, the number of contacts and their total surface contact area per unit volume of tissue were decreased. Current literature reports that, in animal models, enlarged synapses undergo perforations and splitting to modify synaptic connectivity. As against these assumptions, the increased synaptic size observed in our study appears to represent a compensative reaction of old and demented CNS to counteract the reduction in number and in total contact area of the synaptic junctions.
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M3 - Article
C2 - 1409098
AN - SCOPUS:0026793372
VL - 188
SP - 612
EP - 615
JO - Pathology Research and Practice
JF - Pathology Research and Practice
SN - 0344-0338
IS - 4-5
ER -