Which term describes impairment of voluntary movement?

The term that describes impairment of voluntary movement is "dyskinesia." Dyskinesia refers specifically to abnormal, uncontrolled movements that can disrupt normal function, which includes impairments in voluntary motor control. This term encompasses a variety of movement disorders that result in difficulty performing purposeful movements, highlighting how the coordination and quality of movement can be affected.

Understanding dyskinesia is particularly important in the context of various neurological conditions where voluntary movement is compromised. This differentiates it from other terms such as dysfunction, which generally implies a broader range of impairments, or myopathy, which specifically relates to muscle diseases affecting strength and function rather than the precision of voluntary movements. Dysautonomia refers to conditions affecting the autonomic nervous system, which is unrelated to voluntary muscle control. Thus, dyskinesia is the most accurate description of the impairment of voluntary movement among the options provided.