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Palilalia : ウィキペディア英語版
Palilalia
Palilalia (from the Greek πάλιν (''pálin'') meaning "again" and λαλιά (''laliá'') meaning "speech" or "to talk")〔 a complex tic, is a speech disorder characterized by the involuntary repetition of syllables, words, or phrases. It has features resembling other complex tics such as echolalia or coprolalia, but unlike other aphasias, palilalia is based upon contextually correct speech.
It was originally described by Alexandre-Achille Souques in a patient with stroke leading to left-side hemiplegia,〔 although a condition described as auto-echolalia in 1899 by Édouard Brissaud may have been the same condition.〔
== Classification==
Palilalia is considered an aphasia, a disorder of language, and is not to be confused with speech disorder as there is no difficulty in the formation of internal speech. Palilalia is similar to speech disorders like stuttering or cluttering as it tends to only express itself in spontaneous speech, such as answering basic questions, and not in automatic speech like reading or singing; however, it distinctively affects words and phrases rather than syllables and sounds.〔
Palilalia may occur in conditions affecting the pre-frontal cortex or basal ganglia regions, either from physical trauma, neurodegenerative disorders, genetic disorders, or a loss of dopamine in these brain regions.〔 〕 Palilalia occurs most commonly in Tourette syndrome and may be present in neurodegenerative disorders like Alzheimer's disease and progressive supranuclear palsy.〔〔 〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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