Figure 3.

Sensory stimulation triggers Ca²⁺ increase in spinal astrocytes. Section of superficial laminae of dorsal horn of lumbar spinal cord, showing two different astrocytes (a1, a2) in rest condition (a) and following sensory stimulation (b) (scale bar: 10 μm). (c) Quantitative analysis of astrocytic Ca²⁺ levels during rest and stimulation expressed as ΔF/F ₀. The mean value of Ca²⁺ increase during stimulation was significantly higher than that measured during rest (rest versus stimulus, **P ≤ 0.001).