Which characteristic is NOT associated with Multiple Sclerosis?

Multiple Sclerosis (MS) is a chronic illness characterized by the immune system attacking the protective covering of nerves (myelin) in the central nervous system, leading to a variety of neurological symptoms. The condition is closely associated with several key characteristics that can affect patients significantly.

Vision problems are common in MS, often due to optic neuritis, which causes pain and temporary vision loss in one eye. Fatigue is another hallmark symptom of MS, affecting many individuals and often described as a profound lack of energy that does not improve with rest. Spasticity, which refers to muscle stiffness and spasms, is frequently observed in those with MS due to disruption in nerve signaling.

In contrast, acute muscle atrophy is not a typical characteristic directly associated with Multiple Sclerosis. While MS can lead to weakness and some degree of muscle wasting over time due to disuse or positioning, it does not cause muscle atrophy acutely in the way that other conditions (like muscle injuries or severe inactivity) might cause it. Therefore, the absence of acute muscle atrophy as a characteristic of MS makes it the correct answer in this context.