Symptoms of Parkinson's disease include muscle rigidity, tremors, and changes in speech and gait.

Doctors say Parkinson's disease - which can cause trembling, muscle rigidity and other deterioration - is a form of extrapyramidal disease.

Pallidotomy may reduce tremor, muscle rigidity, slow movement, and other motor symptoms.

Parkinson's disease is a degenerative brain disorder that causes tremors and muscle rigidity among other symptoms.

With time, the symptoms worsen and children affected with this disorder will experience a decreased ability to move certain muscles due to muscle rigidity.

Symptoms may include bradykinesia (slow physical movement), muscle rigidity, and tremors.

The condition involves muscle rigidity, weakness, and movement problems.

Alice keeps getting worse, including muscle rigidity and liver failure.

It involves extreme muscle rigidity, sweatiness, salivation, and fever.

Fentanyl:A drug that can cause muscle rigidity and stop respiration.