Dysarthria is an umbrella term for speech disorders that develop due to weakened muscles that people use to speak. These muscles are in the mouth, face, and respiratory system.

Common causes include brain injuries and neurological conditions, but dysarthria can also occur due to:

inflammatory conditions, such as encephalitis, meningitis, and autoimmune diseases, vascular conditions,

such as stroke and Moyamoya disease exposure to toxic elements,

such as carbon monoxide, alcohol, and heavy metals.

There are different types of dysarthria depending on the location of the disorder or damage. However, research suggests hypokinetic dysarthria is the type of speech disorder that doctors often associate with Parkinson’s disease.


Parkinson’s disease is one of many movement disorders, which are neurologic conditions that affect the body’s movement. They can occur when a person’s brain does not supply the basal ganglia with sufficient dopamine.

The basal ganglia are structures deep within the brain that help start and control movement. The lack of dopamine impairs the basal ganglia’s ability to release the inhibition necessary for moving. This includes impaired movement in the muscles responsible for speech and often results in dysarthria.

About 70–100% of people with Parkinson’s also experience dysarthria.


Someone who has dysarthria may experience speech-related symptoms, such as:

  • vocal tremors
  • monotonous vocal tone
  • a voice that sounds hoarse, rough, scratchy, or nasal
  • speech that is unusually quiet or loud
  • speech that is excessively fast or slow
  • twisted vowel and consonant sounds
  • When a person has dysarthria due to Parkinson’s disease, they may also experience movement-related symptoms, including:
  • a slowness or difficulty with moving or walking
  • trouble balancing, falling, dizziness, or fainting
  • body stiffness
  • a stooped posture
  • facial masking, which refers to difficulties making facial expressions
  • body tremors

It is important to note that Parkinson’s disease also may include no movement symptoms, such as psychological changes, sleeping issues, loss of smell, constipation, and weight loss.


The medicines that can be thought of use are: -

  • Aconite
  • Gelsemium
  • Lachesis
  • Lycopodium
  • Stramonium