Dysgraphia in Korean patients with Alzheimer's disease as a manifestation of bilateral hemispheric dysfunction

Cognitive Performance Deficits and Dysgraphia in Alzheimer’s Disease Patients

“…It has been suggested to be a more sensitive indication of language deficits in AD than anomia [37,38] have observed that a sample of 35 patients presenting early onset AD, with a severe degree of hypometabolism in the parietal brain region, exhibited not only linguistic errors but also visuoconstructional manifestations (derived from Hangul scripts) of dysgraphia that were associated with cognitive impairments in multiple domains. In a sample of 75 AD patients and 20 healthy controls that were set Hangul writing tasks, it was found that the writing performance of the AD group was significantly defective with a profusion of different types of errors emerging with disorder progression [39]. PET imaging of glucose metabolism indicated that the hypometabolism in the right occipitotemporal lobe and left temperoparietal lobe was linked to Hangul writing impairment [39], in accordance with lesioning studies of dysgraphia [40].…”

“…In a sample of 75 AD patients and 20 healthy controls that were set Hangul writing tasks, it was found that the writing performance of the AD group was significantly defective with a profusion of different types of errors emerging with disorder progression [39]. PET imaging of glucose metabolism indicated that the hypometabolism in the right occipitotemporal lobe and left temperoparietal lobe was linked to Hangul writing impairment [39], in accordance with lesioning studies of dysgraphia [40]. In a sample of 52 Japanese patients presenting mild AD and 22 healthy controls, writing ability composed of Kana writingto-dictation and copying Kanji or dictational Kanji, and regional cerebral blood flow using SPECT were studied [41].…”

Cognitive Performance Deficits and Dysgraphia in Alzheimer’s Disease Patients

“…Yoon et al [40] have observed that a sample of 35 patients presenting early onset AD, with a severe degree of hypometabolism in the parietal brain region, exhibited not only linguistic errors but also visuoconstructional manifestations (derived from Hangul scripts) of dysgraphia that were associated with cognitive impairments in multiple domains. In a sample of 75 AD patients and 20 healthy controls that were set Hangul writing tasks, it was found that the writing performance of the AD group was significantly defective with a profusion of different types of errors emerging with disorder progression [41]. PET imaging of glucose metabolism indicated that the hypometabolism in the right occipitotemporal lobe and left 's t-test) between AD patients and controls for (i)4A: writing-time (min), (ii) temperoparietal lobe was linked to Hangul writing impairment [41], in accordance with lesioning studies of dysgraphia [42].…”

“…In a sample of 75 AD patients and 20 healthy controls that were set Hangul writing tasks, it was found that the writing performance of the AD group was significantly defective with a profusion of different types of errors emerging with disorder progression [41]. PET imaging of glucose metabolism indicated that the hypometabolism in the right occipitotemporal lobe and left 's t-test) between AD patients and controls for (i)4A: writing-time (min), (ii) temperoparietal lobe was linked to Hangul writing impairment [41], in accordance with lesioning studies of dysgraphia [42]. In a sample of 52 Japanese patients presenting mild AD and 22 healthy controls, writing ability composed of Kana writing-to-dictation and copying Kanji or dictational Kanji, and regional cerebral blood flow using SPECT were studied [43].…”

The distinctive effect of providing syllables in letter fluency testing: Literate vs. illiterate elderly persons

“…Due to this visuospatial aspect, it has been suggested that visuospatial representations of block syllabic forms as a "picture-like image" may be rigidly stored in the lexicons of Korean people (Kim et al, 2007;Yoon et al, 2012), and indeed that the syllable is the minimum storage unit in the Korean lexicon (Nam et al, 1997;Kwon et al, 2005). Consequently, Korean syllable might play a special role in invoking lexical entities for word retrieval in illiterate people who lack the phonemic knowledge.…”