FIG 2.

Scanning electron microscope image obtained in the brain of a Sprague-Dawley rat, showing the arachnoid trabeculae (AT) located in the subarachnoid space (SAS) and connected to the arachnoid mater (AM) and pia mater (PM) just next to the brain (B). The parameters are the following: magnification = 2.50 K X; high current = off; electron high tension = 5.00 kV; signal A = InLens; scan speed = 7; focus = 4.6 mm; stage at Z = 45.724 mm; system vacuum = 2.51e-006 mbar; tilt angle = 0.0°; working distance = 4.6 mm. Used with permission from Saboori. Copyright (2020) Wiley.⁴⁸