Symptoms You may not have any symptoms of upper limb spasticity until weeks, months, or even years after you have a stroke or brain injury. The condition can cause: Stiff arm muscles ...

Spasticity is a condition that causes your muscles to stiffen, tighten, and contract. It happens involuntarily, which means you don’t have control over it. Spasticity typically happens because ...

While they may occur in an otherwise healthy infant, infantile spasms are sometimes associated with an underlying condition such as a brain injury, a genetic disorder, or a brain structure abnormality ...

An optogenetic mouse model of hindlimb spasticity after spinal cord injury. Experimental Neurology, 2025; 386: 115157 DOI: 10.1016/j.expneurol.2025.115157 ...

Spasmodic dysphonia can cause “involuntary voice spasms in the voice box or larynx,” according to Johns Hopkins Medicine. It’s a lifelong condition that frequently affects women between the ...

What causes muscle spasms? Though many things are thought to contribute to muscle spasms, "there is ongoing debate on exactly what causes them," explains Fredericson.

The study, published in Epilepsia, looked at a group of 100 children with infantile spasms who were diagnosed at Boston Children’s Hospital between January 2019 and May 2022.

Medications and their Potential to Cause Increase 'Muscle spasticity' Developed by - Dr. M. Janani Priya, Pharm D Reviewed by - Dr. M. Sree Mohana Preetha, Pharm D Last Updated on Nov 16, 2023 ...

Additionally, people will refer to spasms being in their hips, back, or trunk muscles, while muscle cramps often occur in the calves, feet, and hamstrings. What causes your muscles to act this way?

When back spasms strike, finding quick and effective ways to stop them becomes a top priority. Fortunately, there are several strategies you can employ to get on track to a pain-free day.

What causes muscle spasms? Though many things are thought to contribute to muscle spasms, "there is ongoing debate on exactly what causes them," explains Fredericson.