Fig. 4.

Fast blue staining of inspiratory motoneurons in Tg8 and C3H mice. A, The phrenic (2) and inspiratory intercostal (3) motoneurons stained with fast blue are located in the cervical (1) and thoracic (4) ventral horns, respectively, of the spinal cord (white boxes). Scale bars: 1,4, 200 μm; 2, 3, 50 μm. B, C, The histograms display the percentage of occurrences (% of occurrences) as a function of the cell body area (in square micrometers) for the phrenic motoneurons (B) and for the inspiratory intercostal motoneurons (C) in three C3H mice (white bars) and four Tg8 mice (black bars). The histogram distributions are similar inB but different in C, in which more frequent small cell body areas (<200 μm²) are found in C3H mice and large cell body areas (>500 μm²) are found in Tg8 mice.