Which term is used to describe a condition where movement is affected but speech is not?

The term that describes a condition where movement is affected but speech is not is dysarthria. Dysarthria is a motor speech disorder resulting from neurological injury that leads to difficulty in the physical production of speech. Individuals with dysarthria may have weakened or uncoordinated muscle control related to speech, which can affect the clarity, volume, and quality of their spoken language, but their ability to understand language may remain intact.

In contrast, aphasia and dysphasia primarily pertain to language processing issues rather than physical speech production. Aphasia is a condition that affects a person's ability to communicate effectively, including difficulties in speaking, understanding, reading, or writing. Dysphasia refers specifically to a partial loss of language function.

Ataxia, on the other hand, refers to a lack of voluntary coordination of muscle movements and does not specifically relate to speech. Individuals with ataxia might experience issues with balance and coordination, impacting their movements but not necessarily their ability to speak clearly.

Thus, dysarthria accurately describes a condition in which the physical aspect of speech is affected while the ability to form thoughts and understand language remains relatively unaffected.