RT Book, Section A1 Berkowitz, Aaron L. SR Print(0) ID 1174548989 T1 Movement Disorders T2 Clinical Neurology and Neuroanatomy: A Localization-Based Approach YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9781259834400 LK accessmedicine.mhmedical.com/content.aspx?aid=1174548989 RD 2024/03/28 AB In most realms of neurologic disease, localization is the first step toward differential diagnosis. In assessing movement disorders, however, the first step is to accurately characterize the type of abnormal movement(s) present, each of which has its own differential diagnosis. Movement disorders are broadly classified as either hyperkinetic (increased movement: tremor, chorea, myoclonus, dystonia, tics) or hypokinetic (decreased movement: bradykinesia as is seen in parkinsonism) (Table 23–1).