Agrammatism (from the Greek "agrammatos" - inarticulate) is a neuropsychological impairment that is manifested in the incorrect use of grammatical rules in speech or writing. People with agrammatism have difficulties with the declension and conjugation of words, the use of personal pronouns, the agreement of word forms within a sentence, as well as the construction and understanding of complex grammatical structures.
This impairment may be manifested in the omission of words, an inability to create or understand grammatically correct sentences, and sometimes even in an inability to repeat a phrase correctly.
In children, agrammatism may be caused by hearing impairments or other factors. In adults, it may be associated with brain injuries, especially if the Sylvian region of the brain is damaged.
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