Migration of primary microglia in microfluidic devices occurs on homogeneous fibronectin coating. A. A homogeneous fibronectin coating is formed inside the microchannels. B. The profile of fluorescence intensity acquired with Zen software of Zeiss LSM 700 microscope provides values ranging from 3 to 55 fluorescence intensity arbitrary units. C. Microglial cells are cultured in microfluidic devices and subjected to immunofluorescence for IBA1 (red) and staining with Hoechst (blue). The total migration path is: length 500 μm (white dotted arrow), width 12 μm, height 10 μm, and the scale bar is 50 μm.