Question

What definition of dystonia is correct?

1. involuntary, nonrhythmic chaotic movements
2. abnormal muscular tonus
3. sudden, short, fast repeated, involuntary nonrhythmic stereotypical movements or sounds
4. involuntary, rhythmic oscillations of antagonistic muscles groups
5. involuntary, long-lasting muscle contractions that produce bare movements

Answer 1

Dystonia is defined as involuntary, long-lasting muscle contractions causing bare movements, which can lead to abnormal postures or repetitive movements, significantly affecting daily activities. The correct option is 5.

Step-by-step explanation:

The correct definition of dystonia is involuntary, long-lasting muscle contractions that produce bare movements. Dystonia is a neuromuscular disorder characterized by abnormal muscular tonus due to excessive, involuntary contractions of muscles.

These contractions may be sustained or intermittent, leading to abnormal postures or repetitive movements. An example is cervical dystonia, also known as spasmodic torticollis, where neck muscles contract involuntarily leading to painful and abnormal head positioning that interferes with daily activities.