TY - CHAP M1 - Book, Section TI - Anatomy of the Meninges A1 - Freeman, Brian S. A1 - Berger, Jeffrey S. Y1 - 2024 N1 - T2 - Anesthesiology Core Review: Part One: BASIC Exam, 2nd Edition AB - The brain, as well as the spinal cord, is surrounded by three layers of membranes: a tough outer layer (dura mater); a delicate, middle layer (arachnoid mater); and an inner layer, firmly attached to the surface of the brain (pia mater). Figure 139-1 illustrates these relationships. The cranial meninges are continuous with, and similar to, the spinal meninges through the foramen magnum. However, there is one important distinction: The cranial dura mater consists of two layers, and only one of these is continuous through the foramen magnum. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/03 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=1204769020 ER -