Table 1 Summary of microglia morphology measures.

Process length²²

Summed

µm/cell

Continuous

Photomicro-graph

6 photomicrographs/animal

Cell ramification

Process endpoints²²

Summed

#/cell

Continuous

Photomicro-graph

6 photomicrographs/animal

Cell ramification

Fractal Dimension^36,37

\(\mathrm{regression}\,\mathrm{slope}[\frac{In(N)}{In(\varepsilon )}]\)

D_B

1-2

Individual cell

24 cells/animal

Cell complexity

Span Ratio³⁸

\(\frac{{\rm{convex}}\,{\rm{hull}}\,{\rm{eclipse}}\,{\rm{longest}}\,{\rm{length}}}{{\rm{convex}}\,{\rm{hull}}\,{\rm{eclipse}}\,{\rm{longest}}\,{\rm{width}}}\)

Ratio

0-1

Individual cell

24 cells/animal

Cell shape

Density³⁸

\(\frac{\#\,\mathrm{of}\,\mathrm{pixels}\,\mathrm{within}\,\mathrm{cell}\,\mathrm{outline}}{\mathrm{area}\,\mathrm{of}\,\mathrm{convex}\,\mathrm{hull}}\)

\(\frac{\#\mathrm{of}\,\mathrm{pixels}}{{\rm{area}}}\)

0-1

Individual cell

24 cells/animal

Cell Size