What is the primary characteristic of athetosis?

Athetosis is primarily characterized by slow, writhing movements that are often involuntary and can affect various parts of the body, such as the face, tongue, and limbs. This condition is associated with neurological disorders and is commonly seen in individuals with cerebral palsy. The movements are described as continuous and can vary in intensity, typically making it difficult for individuals to maintain a steady posture or perform controlled movements.

In contrast, rapid movements of the limbs suggest a different type of movement disorder, such as chorea, where the movements are quick and jerky. Flaccid paralysis indicates weakness or loss of muscle tone, which is not characteristic of athetosis. Tremors that occur at rest are more indicative of conditions like Parkinson's disease rather than athetosis. Understanding these nuances helps clarify why slow, involuntary movements define athetosis.