3. Rigidity: Stiffness and Resistance in the Muscles
Rigidity, or muscle stiffness, is a common early symptom of Parkinson’s disease that often accompanies bradykinesia. This stiffness can occur in any part of the body but is most commonly observed in the limbs and trunk. Individuals with rigidity may experience resistance when attempting to move their muscles, making it difficult to perform everyday tasks or engage in physical activities.
One way to identify rigidity is through the “cogwheel phenomenon,” where a healthcare provider will feel a series of small, jerky movements when moving the patient’s limb through its range of motion. This sensation is often compared to the feeling of turning a cogwheel, hence the name.
Rigidity can also contribute to muscle discomfort and pain, as the constant tension in the muscles may lead to muscle cramps or aches. In some cases, rigidity may even impact posture, causing the person to stoop or lean forward. Maintaining an active lifestyle and engaging in regular physical therapy can help alleviate some of the stiffness and discomfort associated with rigidity.
As with other early symptoms of Parkinson’s disease, it’s crucial to recognize that muscle stiffness can have numerous causes. However, if rigidity persists and is accompanied by other early warning signs, it’s essential to seek a medical evaluation to determine the underlying cause. (3)
