Brain & Nervous System Health Center

An Overview of Aphasia

What Is Aphasia?

Aphasia is a communication disorder that results from damage or injury to language parts of the brain. It's more common in older adults, particularly those who have had a stroke.

Aphasia gets in the way of a person's ability to use or understand words. Aphasia does not impair the person's intelligence. People who have aphasia may have difficulty speaking and finding the "right" words to complete their thoughts. They may also have problems understanding conversation, reading and comprehending written words, writing words, and using numbers.

What Causes Aphasia?

Aphasia is usually caused by a stroke or brain injury with damage to one or more parts of the brain that deal with language. According to the National Aphasia Association, about 25% to 40% of people who survive a stroke get aphasia.



Aphasia may also be caused by a brain tumor, brain infection, or dementia such as Alzheimer's disease. In some cases, aphasia is a symptom of epilepsy or other neurological disorder.

What Are the Types of Aphasia?

There are types of aphasia. Each type can cause impairment that varies from mild to severe. Common types of aphasia include the following:

  • Expressive aphasia (non-fluent): With expressive aphasia, the person knows what he or she wants to say, yet has difficulty communicating it to others. It doesn't matter whether the person is trying to say or write what he or she is trying to communicate.
  • Receptive aphasia (fluent): With receptive aphasia, the person can hear a voice or read the print, but may not understand the meaning of the message. Oftentimes, someone with receptive aphasia takes language literally. Their own speech may be disturbed because they do not understand their own language.
  • Anomic aphasia. With anomic aphasia, the person has word-finding difficulties. This is called anomia. Because of the difficulties, the person struggles to find the right words for speaking and writing.
  • Global aphasia. This is the most severe type of aphasia. It is often seen right after someone has a stroke. With global aphasia, the person has difficulty speaking and understanding words. In addition, the person is unable to read or write.
  • Primary progressive aphasia. Primary progressive aphasia is a rare disorder where people slowly lose their ability to talk, read, write, and comprehend what they hear in conversation over a period of time. With a stroke, aphasia may improve with proper therapy. There is no treatment to reverse primary progressive aphasia. People with primary progressive aphasia are able to communicate in ways other than speech. For instance, they might use gestures. And many benefit from a combination of speech therapy and medications.

Aphasia may be mild or severe. With mild aphasia, the person may be able to converse, yet have trouble finding the right word or understanding complex conversations. Severe aphasia limits the person's ability to communicate. The person may say little and may not participate in or understand any conversation.

Continued

What Are the Symptoms of Aphasia?

The main symptoms of aphasia include:

  • Trouble speaking
  • Struggling with finding the appropriate term or word
  • Using strange or inappropriate words in conversation

Some people with aphasia have problems understanding what others are saying. The problems occur particularly when the person is tired or in a crowded or loud environment. Aphasia does not affect thinking skills. But the person may have problems understanding written material and difficulties with handwriting. Some people have trouble using numbers or even doing simple calculations.

How Is Aphasia Diagnosed?

Usually, a doctor first diagnoses aphasia when treating a patient for a stroke, brain injury, or tumor. Using a series of neurological tests, the doctor may ask the person questions. The doctor may also issue specific commands and ask the person to name different items or objects. The results of these tests help the doctor determine if the person has aphasia. They also help determine the severity of the aphasia.

How Is Aphasia Treated?

Treatment for someone with aphasia depends on factors such as:

  • Age
  • Cause of brain injury
  • Type of aphasia
  • Position and size of the brain lesion

For instance, a person with aphasia may have a brain tumor that's affecting the language center of the brain. Surgery to treat the brain tumor may also improve the aphasia.

A person with aphasia who has had a stroke may benefit from sessions with a speech-language pathologist. The therapist will meet regularly with the person to increase his or her ability to speak and communicate. The therapist will also teach the person ways to communicate that don't involve speech. This will help the person compensate for language difficulties.

Here are some tips from the National Stroke Association for someone with aphasia:

  • Use props to help get the message across.
  • Draw words or pictures on paper when trying to communicate.
  • Speak slowly and stay calm when talking.

Carry a card to let strangers know you have aphasia and what aphasia means.

WebMD Medical Reference Reviewed by Neil Lava, MD on September 03, 2014

Sources

SOURCES:

American Stroke Association: "Aphasia vs. Apraxia."

National Stroke Association: "Aphasia."

National Institute on Deafness and Other Communicative Disorders: "Aphasia."

The National Aphasia Association: "Understanding Primary Progressive Aphasia."

© 2014 WebMD, LLC. All rights reserved.

Pagination