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Table of Contents
Speech is one of the main ways in which people communicate their thoughts, feelings, and ideas with others. The act of speaking requires the precise coordination of multiple body parts, including the head, neck, chest, and abdomen. In this article, we explore what speech disorders are and the different types. We also cover the symptoms, causes, diagnosis, and treatment of speech disorders. Speech disorders affect a person's ability to form the sounds that allow them to communicate with other people.
They are not the same as language disorders. Speech disorders prevent people from forming correct speech sounds, while language disorders affect a person's ability to learn words or understand what others say to them. However, both speech and language disorders can make it more difficult for a person to express their thoughts and feelings to others.
Some types of speech disorder include stuttering, apraxia, and dysarthria. We discuss each of these types below:. Stuttering refers to a speech disorder that interrupts the flow of speech. People who stutter can experience the following types of disruption:. The symptoms of stuttering can vary depending on the situation. Stress , excitement, or frustration can cause stuttering to become more severe.
Some people may also find that certain words or sounds can make a stutter more pronounced. Stuttering can cause both behavioral and physical symptoms that occur at the same time. These can include:. The brain controls every single action that people make, including speaking. Most of the brain's involvement in speech is unconscious and automatic. When someone decides to speak, the brain sends signals to the different structures of the body that work together to produce speech.
The brain instructs these structures how and when to move to form the appropriate sounds. For example, these speech signals open or close the vocal cords, move the tongue and shape the lips, and control the movement of air through the throat and mouth. Apraxia is a general term referring to brain damage that impairs a person's motor skills, and it can affect any part of the body. Apraxia of speech, or verbal apraxia, refers specifically to the impairment of motor skills that affect an individual's ability to form the sounds of speech correctly, even when they know which words they want to say.
Dysarthria occurs when damage to the brain causes muscle weakness in a person's face, lips, tongue, throat, or chest. Muscle weakness in these parts of the body can make speaking very difficult. The symptoms of speech disorders vary widely depending on the cause and severity of the disorder. People can develop multiple speech disorders with different symptoms.
Risk factors that can increase the likelihood of a person developing a speech disorder include :. A speech-language pathologist SLP is a healthcare professional who specializes in speech and language disorders. An SLP will evaluate a person for groups of symptoms that indicate one type of speech disorder. To make an accurate diagnosis, SLPs need to rule out other speech and language disorders and medical conditions.
An SLP will review a person's medical and family history. They will also examine how a person moves their lips, jaw, and tongue and may inspect the muscles of the mouth and throat. The type of treatment will typically depend on the severity of the speech disorder and its underlying cause. Target selection involves a person practicing specific sounds or words to familiarize themselves with particular speech patterns.
Examples of therapy targets may include difficult words or sounds that trigger speech disruptions. For this approach, SLPs teach people to recognize speech sounds in different syllable-based contexts.
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Contrast therapy involves saying word pairs that contain one or more different speech sounds. An example word pair might be "beat" and "feet" or "dough" and "show. The oral-motor therapy approach focuses on improving muscle strength, motor control, and breath control.
These exercises can help people develop fluency, which produces smoother speech that sounds more natural. Ear devices are small electronic aids that fit inside the ear canal. These devices can help improve fluency in people who have a stutter. Some ear devices replay altered versions of the wearer's voice to make it seem as though someone else is speaking with them.
Other ear devices produce a noise that helps control stuttering. Some speech disorders can cause people to develop anxiety disorders. Stressful situations can trigger anxiety, resulting in more pronounced speech disorder symptoms. Anxiety medications may help reduce symptoms of speech disorders in some people. Speech disorders affect a person's ability to produce sounds that create words.