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Apraxia
Apraxia is a motor speech impairment in which individuals can’t move their lips, tongue, and teeth to the right place in order to produce speech sounds correctly, even when the muscles are functioning properly. It is considered that apraxia is due to incorrect motor planning, i.e. the brain sends the wrong messages to the mouth.
What causes Apraxia?
Apraxia results from brain damage due to stroke or injury and the severity of the disorder depends on the extent of the damage. Apraxia is caused by damage to the language-dominant hemisphere, which in most people is the left hemisphere. The specific location of the damage is still debated but it likely involves parts of Broca’s area, an area called the insular cortex, and the premotor cortex, which is an area important for planning motor commands.
How is Apraxia different from Aphasia?
Apraxia of speech is specific to motor planning of sounds. Unlike Aphasia it does not result in impairments such as difficulty finding words, understanding spoken language, and using grammatical sentences.
To find out more about this disorder follow this link: Apraxia of Speech
Ataxia
Dysarthria
Dysarthria is a disorder of speech motor production. It results from difficulty controlling or coordinating the muscles that move the tongue, lips, vocal folds, and/or the diaphragm. Dysarthria results from stroke or brain injury to the parts of the brain that control the muscles of the mouth.
How Dysarthria different from Aphasia?
Dysarthria is an impairment specific to motor aspects of speech. Unlike Aphasia it does not result in impairments such as difficulty finding words, understanding spoken language, and using grammatical sentences.
To find out more about this disorder follow the links below:
Dysphagia