Dysarthria is loss of the ability to articulate words normally. Speech may be jerky, staccato, breathy, irregular, imprecise, or monotonous, but people can understand language and use it correctly. Practitioners
evaluate muscle strength and movement by asking the person to do some simple tasks involving their mouth and tongue and to repeat words and sentences. Speech therapy helps some people with dysarthria. Although dysarthria seems to be a language problem, it is really a problem with controlling the muscles of speech (a motor problem). Dysarthria may be caused by damage to the following:
These structures can be damaged by degenerative disorders (such as amyotrophic lateral sclerosis Amyotrophic Lateral Sclerosis (ALS)
and Other Motor Neuron Diseases (MNDs) Motor neuron diseases are characterized by progressive deterioration of the nerve cells that initiate muscle movement. As a result, the muscles stimulated by these nerves deteriorate, become... read more ,
Parkinson disease
Parkinson Disease (PD) Parkinson disease is a slowly progressive degenerative disorder of specific areas of the brain. It is characterized by tremor when muscles are at rest (resting tremor), increased muscle tone... read more , and
Huntington disease
Huntington Disease Huntington disease is a hereditary disease that begins with occasional involuntary jerking or spasms, then progresses to more pronounced involuntary movements (chorea and athetosis), mental... read more ),
multiple sclerosis
Introduction to Meningitis Meningitis is inflammation of the layers of tissue that cover the brain and spinal cord (meninges) and of the fluid-filled space between the meninges (subarachnoid space). Meningitis can be... read more ,
head injuries
Overview of Head Injuries Head injuries that involve the brain are particularly concerning. Common causes of head injuries include falls, motor vehicle crashes, assaults, and mishaps during sports and recreational activities... read more , brain tumors Overview of Brain Tumors A brain tumor can be a noncancerous (benign) or cancerous (malignant) growth in the brain. It may originate in the brain or
have spread (metastasized) to the brain from another part of the body... read more , strokes
Overview of Stroke A stroke occurs when an artery to the brain becomes blocked or ruptures, resulting in death of an area of brain tissue due to loss of its blood supply (cerebral infarction) and symptoms that... read more , or infections such as
Lyme disease Lyme Disease Lyme
disease is a tick-transmitted infection caused by Borrelia species, primarily by Borrelia burgdorferi and sometimes by Borrelia mayonii in the United States. These... read more People who have dysarthria produce sounds that approximate what they mean and that are in the correct order. However, speech may be jerky, staccato, breathy, irregular, imprecise, or monotonous, depending on where the damage is. Because the ability to understand and use language is not usually affected, most people with dysarthria can read and write normally. The disorder that causes dysarthria can also cause difficulty chewing and swallowing.
To diagnose dysarthria, a doctor asks the person about symptoms and does a physical examination. A speech therapist often helps in the evaluation. The practitioner may also do the following:
Standardized tests of brain function (neuropsychologic testing Diagnosis ) may be given by a neuropsychologist or speech therapist. These tests also help practitioners plan treatment and determine how likely recovery is.
Speech therapy Dysarthria helps some people with dysarthria. Speech therapy may involve breathing and muscle exercises and repetition of words or sentences. If dysarthria is severe, therapists may recommend using a letter or picture board or a computer-based device with a keyboard and message display. CLICK HERE FOR THE PROFESSIONAL VERSION Copyright © 2022 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved. What part of the brain is responsible for slurred speech?Speaking slowly or slurring words
If Broca's area is damaged, a person might find it difficult to produce the sounds of speech or may speak very slowly and slur their words. Speech is often limited to short sentences of less than four words. This is called Broca's aphasia or nonfluent aphasia.
What part of the brain affects your speech?Frontal lobe.
The frontal lobe contains Broca's area, which is associated with speech ability.
What happens if the Broca's area is damaged?As a result of a lesion in Broca area, there is a breakdown between one's thoughts and one's language abilities. Thus, patients often feel that they know what they wish to say but are unable to produce the words. That is, they are unable to translate their mental images and representations to words.
What are the two parts of the brain that are thought to control speech?Broca's area and Wernicke's area are considered the major components of the brain involved in speech, but other parts of the brain also play an important role in coordinating the muscles of the mouth to create spoken words. For most people, speech-related brain activity happens on the left side of the brain.
|