@article{HeinsenHeinsen1983,
  author    = {Heinsen, Helmut and Heinsen, Y. L.},
  title     = {Cerebellar capillaries: qualitative and quantitative observations in young and senile rats},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59924},
  year      = {1983},
  abstract  = {Ultrastructural changes including reduced electron density, reduction in polysemes and cisternae of rough endoplasmic reticulum occur in the cytoplasrn of endothelial cells and pericytes in the cerebellar cortex of senile virgin female Han: WIST-rats in cornparison to 3-month old virgin rats. Processes of pericytes cover less of the capillary surface in the cerebellar cortex of senile rats; moreover, arithmetic and harmonic mean thickness of the endothelium and relative volume of mitochondria in endothelial cells and pericytes are reduced, w hereas the luminal diameter of the capillaries, harmonic and arithmetic mean thickness of pericytes and their processes and of the basal laminae between endothelial cells and astrocytes (abbreviated BAL 1), pericytes and astrocytes (BAL 2) and endothelial cells and pericytes (BAL 3) increase. The increase in harmonic mean thickness of the basal laminae is statistically significant (α<=0.05) and compensates for a decrease in thickness of capillary endothelium. Consequently, the total barrier mass and thickness of cerebellar cortical capillaries in senile animals is higher than in young individuals.},
  subject      = {Medizin},
  language  = {en}
}
@article{HeinsenHeinsen1983,
  author    = {Heinsen, Helmut and Heinsen, Y. L.},
  title     = {Quantitative studies on regional differences in Purkinje cell dendritic spines and parallel fiber synaptic density},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59917},
  year      = {1983},
  abstract  = {No abstact available},
  subject      = {Medizin},
  language  = {en}
}
@article{Heinsen1979,
  author    = {Heinsen, Helmut},
  title     = {Lipofuscin in the cerebellar cortex of albino rats: an electron microscopic study},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59891},
  year      = {1979},
  abstract  = {The ultrastructure of autofluorescent, PAS-positive lipofuscin in Purkinje, granule, Golgi epithelial, basket and stellate, microglial and perivascular cells in the cerebellar cortex of senescent rats is described. The membrane- bounded pigment is composed ofthree elements: 1) electron-lucent homogeneaus droplets, 2) a granular matrix and 3) intensely osmiophilic patches. The proportians ofthese three components vary between cell types and one can grossly differentiate a neuronal and a gliallipofuscin. The lipofuscin granules of stellate and perivscular cells are different from lipofuscin of other cerebellar neurons and glia. lt can be concluded from these morphological observations that each cerebellar cell type has its distinct lipofuscin.},
  subject      = {Medizin},
  language  = {en}
}