RT Book, Section A1 Crawford, Richard K. A1 Torner, James C. A2 Boulton, Matthew L. A2 Wallace, Robert B. SR Print(0) ID 1182672067 T1 Diseases of the Nervous System T2 Maxcy-Rosenau-Last Public Health & Preventive Medicine, 16e YR 2022 FD 2022 PB McGraw Hill PP New York, NY SN 9781259644511 LK accessmedicine.mhmedical.com/content.aspx?aid=1182672067 RD 2024/10/15 AB Diseases of the nervous system (DNS) are etiologically diverse, giving rise to myriad conditions both acute and chronic in nature. Neurological disorders may have an insidious onset or have symptoms that are nonspecific, making classification difficult. Early stages of some disorders are characterized by a variable presentation or by subtle signs and symptoms that are difficult to detect or that go unrecognized until function is impaired. Their occurrence may be at birth, which may confer a lifelong disability, or may occur in middle or late life, which may result in progressive disability and death. Some disorders in children may be developmental and may go undetected until the children reach the age at which deficits are assessed. Hence, recognition, diagnosis, and progression of neurological symptoms may affect the true magnitude and observed onset of neurological disorders.