Dysarthria

Also called Slurred speech or Difficulty speaking

Dysarthria is when the muscles used for speaking are weak or hard to control, so speech becomes slurred, slow, quiet or hard to understand. It is caused by damage to the brain or nerves, for example from a stroke, head injury, Parkinson's disease, multiple sclerosis or motor neurone disease. It does not affect understanding or intelligence.

Last updated Nov 9, 2026

What it is

It is different from aphasia, which affects language itself, though both can happen together after a stroke.

Speech and language therapy helps people speak more clearly and find other ways to communicate, such as communication aids.

Common signs

  • Slurred, nasal or breathy speech
  • Speaking too slowly, quickly or quietly
  • Difficulty moving the tongue and lips
  • Difficulty swallowing

How it is usually diagnosed

  • Assessment by a speech and language therapist
  • Tests and scans to find the cause, such as an MRI

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Speech and language therapy assessments
  • Neurology letters and scan reports
  • Swallowing assessments

Questions to ask your doctor

  • What is causing the speech problem?
  • What therapy and communication aids are available?
  • Is swallowing safe?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Sudden slurred speech with face drooping or arm weakness: call 112, it may be a stroke

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources