Which of the following describes decreased motor response to a specific stimulus?

The term that describes decreased motor response to a specific stimulus is hypokinesia. This condition is characterized by reduced movement or an overall decrease in the amplitude of movement responses. It is often seen in various neurological disorders, where the capability to respond to stimuli with typical motor reactions is diminished.

In cases of hypokinesia, individuals may exhibit slower or less vigorous movements, which can impact their ability to perform everyday tasks. This is particularly relevant in conditions such as Parkinson's disease, where patients may struggle with initiating movements or responding adequately to external stimuli.

Other terms refer to different motor-related phenomena. For instance, hyperkinesia involves excessive or increased movement, while dystonia refers to sustained muscle contractions that result in abnormal postures or repetitive movements. Athetosis is characterized by slow, writhing movements, typically of the hands and feet. Understanding these distinctions helps clarify why hypokinesia is the most appropriate term to describe a decreased motor response to a specific stimulus.