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In some cases the cause is unknown. However, there are various known causes of speech impairments, such as hearing loss, neurological disorders, brain injury, an increase in mental strain, constant bullying, intellectual disability, substance use disorder, physical impairments such as cleft lip and palate, and vocal abuse or misuse. [12]
Dysarthria is a speech sound disorder resulting from neurological injury of the motor component of the motor–speech system [1] and is characterized by poor articulation of phonemes. [2] It is a condition in which problems effectively occur with the muscles that help produce speech, often making it very difficult to pronounce words.
Palilalia is similar to speech disorders such as stuttering or cluttering, as it tends to express itself only in spontaneous speech, such as answering basic questions, and not in automatic speech such as reading or singing; however, it distinctively affects words and phrases rather than syllables and sounds.
A specific physical disability or communication disorder can be more easily diagnosed. Loss of previously normal speech can be due to accidents, disease, or surgical complication; it is rarely for psychological reasons. Treatment or management also varies by cause and this can often determined after a speech assessment. [4]
As opposed to having followed trauma to the brain, a patient must show an insidious onset and a gradual progression of aphasia, defined as a disorder of sentence and/or word usage, affecting the production and comprehension of speech. The disorder in question must be the only determinant on functional impairment in the activities of the patient ...
It is the story of Hale's husband, John Hale, a scholar who had had a stroke and lost speech formation abilities. In her book, Hale also explains the symptoms and mechanics behind aphasia and speech formation. She adds the emotional components of dealing with a person with aphasia and how to be patient with the speech and communication. [35] [36]
Spasmodic dysphonia, also known as laryngeal dystonia, is a disorder in which the muscles that generate a person's voice go into periods of spasm. [1] [2] This results in breaks or interruptions in the voice, often every few sentences, which can make a person difficult to understand. [1]
Dysarthria is a motor speech disorder that results from a neurological injury. Neurodegenerative conditions like Parkinson's disease, amyotrophic lateral sclerosis, and progressive supranuclear palsy frequently transpire in association with dysarthria. [6] Some stem from central damage, while other stem from peripheral nerve damage.