High power view of the denticulate ligament (Dent) and neighboring structures (Triple stain). Pia mater (PM) is attached to the surface of spinal white matter (WM). The denticulate ligament is an expansion of pia mater collagen that periodically sends extensions toward the dura mater (DM). Arachnoid (A) and a dorsal root (DR) and a ventral root (VR) are also labeled.