Question: what are the different layers of the meninges from innermost to outermost?
Answer: The meninges, which enclose the CNS, consist of three layers: the dura mater (outermost layer), the arachnoid membrane, and the pia mater (innermost layer) (Fig. 14-13). Together, the arachnoid membrane and pia mater are frequently referred to as the leptomeninges, pia-arachnoid layer, or pia-arachnoid.