PalkovitsM+2-1971b¶
Notes about [PalkovitsM+2-1971b] 1.
- 1(1,2,3)
M Palkovits. Quantitative histological analysis of the cerebellar cortex in the cat. II. Cell numbers and densities in the granular layer. Brain Research, pages 16, 1971. Notes: PalkovitsM+2-1971b.html (this file).
This paper has data about of grannule cells and Golgi cells in cat cerebellum.
Data for table Cell counts in different species
The following table has data and references for table Cell counts in different species. Values are the number of cells of the given type in the specified species.
Id |
Cell type |
Species |
Value |
Reference |
|---|---|---|---|---|
pb1 |
grannule |
cat |
2.2 x 10^9 |
|
pb2 |
golgi |
cat |
417,000 |
Figure is given on page 29 (summary section). Also states that the The granule cell : Purkinje cell ratio was 1700-1800 : 1.
Paper also states that the ratio of Golgi cells to Purkinje cells is 1 : 3. This means, that if there are 1.25 x 10^6 Purkinje cells, then there are about 416,666 Golgi cells (rounded, about 417,000).
30:
This density of the Golgi cells – assuming non-overlap between dendrites and axons – would require a compartmentation of the space available to the Golgi cells in an idealized model into hexagonal prisms of around 100 #m diameter. The prisms would cut vertically through all 3 layers of the cortex, and the volume of the part corresponding to the granular layer would be approximately 0.002 cu.mm (calculated for the living cat), containing about 200 glomeruli.
If 200 glomeruli are contacted by each Golgi cell, then the number of granule cells potentiall connected by each Golgi cell would be 200 * 112 = 2.24 x 10^4. This is different than the figure of 5.2x10^3 in [LoebnerEE-1989] Fig 2. If the average was 28 granule cells per glomeruli, the figure would be 200 * 28 = 5.6x10^3 which is closer to the figure in [LoebnerEE-1989] Fig 2.