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Movement Disorders 

Movement Disorders
Movement Disorders
Introduction to Clinical Neurology (5 edn)

Linda M. Selwa

and Douglas J. Gelb


The term “movement disorder” refers to a heterogeneous group of conditions that result in abnormal form or timing of voluntary movement in individuals with normal strength and sensation. Movement disorders can be grouped into three general categories, hypokinetic, hyperkinetic, and ataxic. Hypokinetic movement disorders are characterized by tremors. Hyperkinetic movement disorders are characterized by involuntary movements that intrude into the normal flow of motor acts. Ataxic movement disorders are characterized by a lack of speed and skill in performing acts requiring the smoothly coordinated activity of several muscles.

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