4. Muscular Rigidity – The Unyielding Stiffness
In the context of OPCA, muscular rigidity refers to the stiffness or inflexibility of the muscles, which often results in restricted movement. It’s quite different from muscular weakness, another symptom of OPCA, which we will explore later.
The cerebellum, along with the basal ganglia, a part of the brain involved in controlling voluntary movements, are both affected in OPCA. This involvement results in motor symptoms such as rigidity.
Patients with OPCA often experience a persistent and involuntary contraction of muscles. This contraction, termed as ‘spasticity,’ leads to stiffness and tightness, hindering smooth and easy movements.
Early on, this muscular rigidity might only mildly hinder movement, but as the condition progresses, the stiffness can become more pronounced, restricting mobility significantly. A person might find it hard to move around, make quick movements, or even change positions while lying down. This rigidity can also lead to muscle aches and discomfort, further adding to the individual’s difficulties.
Additionally, rigidity can contribute to abnormal postures and gait. A person with OPCA might develop a stooped posture or have a stiff, shuffled walk due to the inflexibility of the muscles. Their arms might not swing when they walk, or they might have difficulty turning around quickly.
It’s essential to remember that rigidity in OPCA isn’t just about mobility. It can also affect a person’s ability to perform simple tasks that require fine motor skills, like writing, buttoning a shirt, or turning a key in a lock. Each of these symptoms contributes to the overall impact of OPCA, painting a comprehensive picture of this condition’s effects on the human body.(4)
