TY - CHAP M1 - Book, Section TI - Spinal Cord: Organization and Tracts A1 - Uddeen, Sarah A1 - Moy, Gregory A2 - Freeman, Brian S. A2 - Berger, Jeffrey S. PY - 2014 T2 - Anesthesiology Core Review: Part One Basic Exam AB - The spinal cord is made of both gray and white matter. Gray matter consists of neurons, neuronal processes, and neuroglia. It is butterfly or H-shaped. White matter surrounds gray matter and is made up of neuronal processes (myelinated and unmyelinated), neuroglia, and blood vessels. The proportion of gray to white matter varies at different levels of the spinal cord. The ratio of gray to white matter is greatest at the cervical and lumbar regions. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=1102568771 ER -