Apraxia is a disorder of the brain and nervous system in which a person is unable to perform tasks or movements when asked, even though:
- The request or command is understood
- They are willing to perform the task
- The muscles needed to perform the task work properly
- The task may have already been learned
Causes of Apraxia
Apraxia is caused by damage to the brain. When apraxia develops in a person who was previously able to perform the tasks or abilities, it is called acquired apraxia.
The most common causes of acquired apraxia are:
- Brain tumor
- Condition that causes gradual worsening of the brain and nervous system (neurodegenerative illness)
- Traumatic brain injury
Apraxia may also be seen at birth. Symptoms appear as the child grows and develops. The cause is unknown.
Apraxia of speech is often present along with another speech disorder called aphasia. Depending on the cause of apraxia, a number of other brain or nervous system problems may be present.
A person with apraxia is unable to put together the correct muscle movements. At times, a completely different word or action is used than the one the person intended to speak or make. The person is often aware of the mistake.
Symptoms of apraxia of speech include:
- Distorted, repeated, or left out speech sounds or words. The person has difficulty putting words together in the correct order.
- Struggling to pronounce the right word
- More difficulty using longer words, either all the time, or sometimes
- Ability to use short, everyday phrases or sayings (such as "How are you?") without a problem
- Better writing ability than speaking ability
Other forms of apraxia include:
- Buccofacial or orofacial apraxia: Inability to carry out movements of the face on demand, such as licking the lips, sticking out the tongue, or whistling.
- Ideational apraxia: Inability to carry out learned, complex tasks in the proper order, such as putting on socks before putting on shoes.
- Ideomotor apraxia Inability to voluntarily perform a learned task when given the necessary objects. For instance, if given a screwdriver, the person may try to write with it as if it were a pen.
- Limb-kinetic apraxia: Difficulty making precise movements with an arm or leg. It becomes impossible to button a shirt or tie a shoe.
Frustration, profanity, and depression are typical responses in persons with aphasia.
Tests and Exams
The following tests may be performed if the cause of the disorder is not known:
- CT or MRI scans of the brain may help show a tumor, stroke, or other brain injury.
- An electroencephalogram (EEG) may be used to rule out epilepsy as a cause of the apraxia.
- A spinal tap may be done to check for inflammation or an infection that affects the brain.
Standardized language and intellectual tests should be done if apraxia of speech is suspected. Testing for other learning disabilities may also be needed.
Treatment of Apraxia
People with apraxia may benefit from treatment by a health care team. The team should also include family members.
Occupational and speech therapists may help both patients and their caregivers learn ways to deal with the apraxia. Because patients with apraxia have trouble following instructions, therapists who are experienced in treating this disorder may have better results.
Speech and language treatment may include:
- Repeating sounds over and over to teach mouth movements
- Slowing down the person's speech
- Teaching different techniques to help with communication
Recognition and treatment of depression is important for people with severe speech and language disorders.
- Maintain a relaxed, calm environment.
- Take time to show someone with apraxia how to do a task, and allow enough time for them to do so. Do not ask them to repeat the task if they are clearly struggling with it and doing so will increase frustration.
- Suggest alternative ways to do the same things. For example, try a hook and loop closure instead of laces for shoes.
When speech apraxia is present:
- Avoid giving complex directions.
- Use simple phrases to avoid misunderstandings.
- Speak in a normal tone of voice. Speech apraxia is not a hearing problem.
- Do not assume that the person understands.
- Provide communication aids, if possible, depending on the person and condition.
Many people with apraxia are no longer able to be independent and may have trouble performing everyday tasks. Ask your health care provider which activities may or may not be safe. Avoid activities that may cause injury and take the proper safety measures.
- Learning problems
- Low self-esteem
- Social problems
When to Contact a Health Professional
Contact your doctor if someone has difficulty performing everyday tasks or has other symptoms of apraxia after a stroke or brain injury.
Prevention of Apraxia
Reducing your risk of stroke and brain injury may help prevent conditions that lead to aphasia.
Kirshner HS. Language and speech disorders: motor speech disorders: dysarthria and apraxia of speech. In: Daroff RB, Fenichel GM, Jankovic J, Mazziotta JC, eds. Bradley's Neurology in Clinical Practice. 6th ed. Philadelphia, PA: Saunders Elsevier; 2012:chap 12B.
Kortte JH, Palmer JB. Speech and language disorders. In: Frontera, WR, Silver JK, Rizzo TD Jr, eds. Essentials of Physical Medicine and Rehabilitation. 2nd ed. Philadelphia, PA: Saunders Elsevier; 2008:chap 145.
|Review Date: 7/27/2014
Reviewed By: Joseph V. Campellone, MD, Department of Neurology, Cooper University Hospital, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.