What is commonly observed in patients with spastic dysarthria?

• A. Excessive breathiness and pitch variation
• B. Increased muscle tone and spasticity
• C. Involuntary movements and dyskinesias
• D. Weakness and flaccidity

Answer: (B)

Patients with spastic dysarthria typically exhibit increased muscle tone and spasticity. This condition arises due to damage in the upper motor neurons, leading to a characteristic tightness and stiffness in the muscles. The increased muscle tone can result in difficulties with speech production, as the muscles may not relax appropriately, causing a slow, effortful speech pattern. This results in a strained, harsh voice quality and a reduction in the normal variability of pitch and loudness. The presence of spasticity can also affect articulation and overall speech intelligibility, making communication challenging for those affected.

The other scenarios mentioned, such as excessive breathiness and pitch variation, typically relate to different types of dysarthria, while weakness and flaccidity signify lower motor neuron involvement. Involuntary movements and dyskinesias are more connected to movement disorders such as dyskinetic dysarthria.