New research have found that changes in eye movements when reading any kind of materials may be connected to deterioration in working memory and an early sign of Alzheimer’s disease according to a study written in the  Journal of Clinical and Experimental Neuropsychology.

rereading a bookThe study concentrated on a group of 20 patients who were likely to develop Alzheimer’s disease. Movement in the eyes were documented at the University Nacional del Dur, Bahia Blanca, Argentina. The material that was given to the patients were sentences in Spanish created to embody a considerable amount of grammatical structure. The eye movement study was performed for an integrative group of researchers based in Argentina and in Germany.

The researches discovered that the tested participants showed a lower ability to predict the next word coming up in a sentence based on contextual information, in conjunction with the meaning of sentences and grammatical structure, when compared to controlled participants.

The researchers were expecting to find that when the participants knew beforehand the context of the sentence based on structure and meaning, they could conclude what words should appear next in the sentence and for that reason jump over to more upcoming words. However, the patients who were more likely to develop Alzheimer’s disease skipped words less often than the controlled group, indicating troubles for them in integrating and utilizing word stored information, as a result of impairments in the working memory and in memory that helps in retrieving information.

The researchers also realize that when participants with early Alzheimer’s disease are carrying out duties such as reading and writing, movement coordination and planning difficulties that are present are commonly no noticed.

The researchers go on to say that a comprehensive examination of eye movement and processed that includes word predictions may provide key markers for early Alzheimer’s disease symptoms.

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