Neurological Speech & Language Disorders

Neurological problems occur when there is dysfunction to nervous system (Brain & Nerves).

Neurological Speech & Language Disorder type is dependent on the area of nervous system affected.

Neurological Speech & Language disorder can be acquired or progressive damage to nervous system.

Acquired Neurological Speech & Language Disorder

Neurological Speech & Language problems acquired as a result of sudden injury to nervous system such as stroke or head injury.

Some of acquired speech & language conditions are –


Aphasia is a partial or total loss of language due to brain damage. Mostly damage to left side of brain results in language problems whereas damage to right side of brain results in attention and memory problems. Receptive language skills (comprehension), expressive language skills (speaking), reading & writing can be affected in Aphasics. Brain damage can also associated with other problems such as Dysarthria, Apraxia of Speech, Swallowing problems along with Aphasia.


Dysarthria is a motor speech disorder resulting in slurred or slow speech thus affecting speech intelligibility. Dysarthria occurs due to damage or weakness to nerves, muscles and organs responsible for speech production.

Progressive Neurological Speech & Language Disorder

Deterioration or worsening of the nervous system over time resulting in progressive neurological speech language disorder. It can be gradual or rapid deterioration or worsening of speech and language functions.

Some of the progressive conditions are –
  • 1. Parkinson’s Disease
  • 2. Amyotrophic Lateral Sclerosis (ALS)
  • 3. Dementia
  • 4. Multiple Sclerosis (MS)
  • 5. Guillain-Barre Syndrome (GBS)
Apraxia of Speech (AOS)

AOS is a motor speech disorder in which motor planning of speech movements or volitional production of speech is affected. AOS happens when the neural pathway between the brain and a person’s speech muscles is lost or obscured. Person with AOS often seen struggling to get the right placement of articulators for speech production.