Frontal allographic agraphia in a patient with behavioral variant frontotemporal dementia.
Neurocase
; 30(1): 32-38, 2024 02.
Article
in En
| MEDLINE
| ID: mdl-38752838
ABSTRACT
We report a patient with behavioral variant frontotemporal dementia who developed agraphia, irritability, perseverative and stereotyped behavior, and dietary changes. MRI revealed bilateral frontal convexity atrophy. Neuropsychological examination showed fluent aphasia with perseverative allographic agraphia, mild semantic impairment, and dysexecutive syndrome. Allographic agraphia featured unidirectional conversion from hiragana (cursive form of Japanese phonograms) and kanji (Japanese morphograms) to katakana (square form of Japanese phonograms), as opposed to mutual (bidirectional) conversion between hiragana and katakana in parieto-occipital gyri lesions. Furthermore, all letters of the word were converted and this whole-word conversion may be characteristic of perseverative behavior in frontotemporal dementia.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Agraphia
/
Frontotemporal Dementia
Limits:
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Neurocase
Journal subject:
CIENCIAS DO COMPORTAMENTO
/
NEUROLOGIA
/
PSICOLOGIA
/
PSIQUIATRIA
Year:
2024
Document type:
Article
Affiliation country:
Japón