Kanji‐predominant alexia in advanced Alzheimer's disease

@article{Nakamura1998KanjipredominantAI,
  title={Kanji‐predominant alexia in advanced Alzheimer's disease},
  author={K. Nakamura and K. Meguro and H. Yamazaki and J. Ishiaaki and H. Saito and N. Saito and M. Shimada and S. Yamaguchi and Y. Shimada and A. Yamadori},
  journal={Acta Neurologica Scandinavica},
  year={1998},
  volume={97}
}
Objectives ‐ Oral reading is preserved until the late stage of Alzheimer's disease (AD). However, it is unknown whether reading of kanji and kana is differentially impaired in Japanese AD patients. The purpose of this study was to examine alexic pattern in AD as related to two script systems. Material and methods ‐ In 18 severe AD patients, reading performance was compared among kana characters, monographic kanji words, and kana‐transcribed words. Auditory comprehension was also examined… Expand
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References

SHOWING 1-10 OF 49 REFERENCES
Reading kanji without semantics: Evidence from a longitudinal study of dementia
Abstract The effects of the degenerative disease process on patterns of oral reading and reading comprehension of Japanese kanji words were investigated longitudinally in 3 demented patients, basedExpand
Alexia in dementia of the Alzheimer's type
TLDR
The reading aloud of single words in 16 subjects with dementia of the Alzheimer's type (DAT) was compared with the performance of control subjects and demonstrated that both the lexical and the non‐lexical reading strategies were impaired. Expand
Impaired phonological reading in primary degenerative dementia.
  • H. Diesfeldt
  • Psychology, Medicine
  • Brain : a journal of neurology
  • 1991
This case study reports the profile of preserved and impaired capacities in a left-handed patient suffering from primary degenerative dementia of unknown aetiology. She was remarkable because herExpand
Pattern of language impairment is different in Alzheimer's disease and multi-infarct dementia
TLDR
The results indicate that the examination of language functions is valuable in the differential diagnosis of dementia, as changes in language functions in normal subjects could be clearly differentiated from those seen in patients with mild dementia. Expand
The pattern of reading deterioration in dementia of the Alzheimer type: Observations and implications
TLDR
The results suggest that the pattern of reading deterioration may aid in the clinical identification of DAT, that the disturbance of reading comprehension is a linguistic deficit rather than a product of visual-perceptual disturbances, and that the alexia is more consistent with an instrumental loss than a de-developmental model of dementia. Expand
A study of language functioning in Alzheimer patients
TLDR
Language functioning in Alzheimer's disease is reviewed and the performance of 25 Alzheimer patients on a standard battery is reported, finding that reading, writing, and performance scores except praxis, were lower than oral language scores. Expand
A critical appraisal of neuropsychological correlates of Japanese ideogram (kanji) and phonogram (kana) reading.
TLDR
These are the first data to demonstrate unequivocally no consistent linkage between aphasia type and the patterns of impairment of phonogram and ideogram reading, and are designed to overcome the omissions of previous studies. Expand
Lexical agraphia in Alzheimer's disease.
TLDR
Findings indicated an impairment of the lexical spelling system, consistent with the diagnosis of lexical agraphia, in patients with senile dementia of the Alzheimer type (SDAT). Expand
A Longitudinal Study of Word-Reading Ability in Alzheimer's Disease: Evidence from the National Adult Reading Test
TLDR
NART scores were significantly correlated with dementia severity in AD subjects at final testing only, suggesting that the NART is sensitive to dementia severity only at the later stages of the disease. Expand
Language disintegration in dementia: Effects of etiology and severity
TLDR
Speech characteristics on a standardized picture description task of 26 subjects with presumed senile dementia of the Alzheimer type and 13 subjects with stroke-related dementia (SRD) were compared to 15 normal subjects, confirming prior suggestions that lexicon is more vulnerable to disruption in dementia than syntax. Expand
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