What does the Modified Ashworth Scale measure?

The Modified Ashworth Scale is specifically designed to measure spasticity, which is the increased tone in muscles due to neurological conditions. This scale provides a standardized way to assess the resistance felt in the muscles when they are passively stretched. Spasticity is commonly associated with conditions such as stroke, multiple sclerosis, and cerebral palsy, where neurological changes lead to muscle stiffness or tightness.

The scale assigns grades to the level of spasticity observed during the assessment, helping clinicians to evaluate the effectiveness of interventions, monitor changes over time, and guide treatment planning. Since the primary focus of the Modified Ashworth Scale is on the assessment of spasticity and its impact on muscle tone, it is the most appropriate choice among the given options.

In contrast, measures such as joint range of motion focus on the extent of motion available at joints, muscle strength assessments evaluate the force produced by muscles, and neurological reflexes involve testing the integrity of the nervous system's responses. Each of these areas is important in rehabilitation but is not captured by the Modified Ashworth Scale, which is dedicated solely to the evaluation of spasticity.