FAU Advanced Health Assessment Practice Test

What is dysdiadochokinesia?

1. Impairment of balance

2. Difficulty with speech

3. Impairment of rapid alternating movements

4. Loss of fine motor skills

The correct answer is: Impairment of rapid alternating movements

Dysdiadochokinesia refers specifically to the inability to perform rapid alternating movements smoothly and effectively, which is a key indicator of motor control problems often associated with cerebellar dysfunction. This condition is commonly assessed in neurological examinations, where a patient may be asked to quickly alternate between movements such as pronation and supination of the hands or tapping their foot. The difficulty in executing these rapid movements reflects a disruption in the coordination and control of muscle activity, which can indicate underlying neurological issues. The other choices represent different types of motor or cognitive disabilities. Impairment of balance pertains to coordination and stability, often linked to vestibular function, but does not directly relate to alternating movements. Difficulty with speech involves structures responsible for language and articulation, usually associated with aphasia or dysarthria rather than dysdiadochokinesia. Loss of fine motor skills encompasses tasks that require precision, which differs from the rapid and alternating nature of movements involved in dysdiadochokinesia. Thus, the focus on rapid alternating movements is what defines this condition clearly and accurately.