Visual texture agnosia influences object identification in dementia with Lewy bodies and Alzheimer's disease

Cortex ◽  
2020 ◽  
Vol 129 ◽  
pp. 23-32
Author(s):  
Yuka Oishi ◽  
Toru Imamura ◽  
Tatsuo Shimomura ◽  
Kyoko Suzuki
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies ◽  
Object Identification ◽  
Visual Texture

Visual texture agnosia in dementia with lewy bodies and Alzheimer’s disease

2017 ◽  
Vol 381 ◽  
pp. 769
Author(s):  
Y. Oishi ◽  
T. Imamura ◽  
T. Shimomura ◽  
K. Suzuki
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies ◽  
Visual Texture

Visual texture agnosia in dementia with Lewy bodies and Alzheimer's disease

Cortex ◽  
2018 ◽  
Vol 103 ◽  
pp. 277-290 ◽  
Author(s):  
Yuka Oishi ◽  
Toru Imamura ◽  
Tatsuo Shimomura ◽  
Kyoko Suzuki
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies ◽  
Visual Texture

scholarly journals Vegetable Freshness Perception in Dementia with Lewy Bodies and Alzheimer’s Disease

2020 ◽  
Vol 10 (2) ◽  
pp. 74-85
Author(s):  
Yuka Oishi ◽  
Toru Imamura ◽  
Tatsuo Shimomura ◽  
Kyoko Suzuki
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Contrast Sensitivity ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies ◽  
Healthy Controls ◽  
Visual Texture ◽  
Texture Recognition ◽  
Brightness Perception ◽  
The Relationship

Introduction: Although various visual function deficits have been reported in patients with Alzheimer’s disease (AD) and dementia with Lewy bodies (DLB), vegetable freshness perception has not been thoroughly examined. Objective: To investigate vegetable freshness perception in patients with AD and DLB and to clarify the relationship between vegetable freshness perception and various visuoperceptual functions. Methods: We enrolled 37 patients with probable DLB, 58 patients with probable AD, and 32 age-matched healthy controls. We assessed vegetable freshness perception and visuoperceptual functions, including vegetable brightness perception, contrast sensitivity, color perception, and stereopsis. Patients with DLB showed disproportionate deficits in vegetable freshness perception and vegetable luminance perception compared to patients with AD and controls. Analyses of the groups with higher and lower vegetable freshness perceptions revealed significant differences in contrast sensitivity and visual texture recognition. Results: In the vegetable freshness test, we found significant differences among the 3 groups (F = 30.029, p < 0.0001); the extent of impairment in patients with DLB was greater than that in patients with AD. In patients with DLB, the vegetable freshness judgments were significantly correlated with texture judgment scores and contrast sensitivity. Conclusion: Our findings revealed significantly impaired vegetable freshness perception in patients with DLB. Vegetable freshness perception may be related to visual texture recognition in patients with DLB.

Generalized Rhythmic Delta Activity Frontally Predominant Differentiates Dementia With Lewy Bodies From Alzheimer's Disease and Parkinson's Disease Dementia: A Conventional Electroencephalography Visual Analysis

2021 ◽  
pp. 155005942199714
Author(s):  
Lucia Zinno ◽  
Anna Negrotti ◽  
Chiara Falzoi ◽  
Giovanni Messa ◽  
Matteo Goldoni ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Parkinson’S Disease ◽  
Alzheimer's Disease ◽  
Parkinson's Disease ◽  
Cognitive Impairment ◽  
Dementia With Lewy Bodies ◽  
Visual Analysis ◽  
Lewy Bodies ◽  
Delta Activity ◽  
Rhythmic Delta Activity

Introduction. An easily accessible and inexpensive neurophysiological technique such as conventional electroencephalography may provide an accurate and generally applicable biomarker capable of differentiating dementia with Lewy bodies (DLB) from Alzheimer’s disease (AD) and Parkinson’s disease-associated dementia (PDD). Method. We carried out a retrospective visual analysis of resting-state electroencephalography (EEG) recording of 22 patients with a clinical diagnosis of 19 probable and 3 possible DLB, 22 patients with probable AD and 21 with PDD, matched for age, duration, and severity of cognitive impairment. Results. By using the grand total EEG scoring method, the total score and generalized rhythmic delta activity frontally predominant (GRDAfp) alone or, even better, coupled with a slowing of frequency of background activity (FBA) and its reduced reactivity differentiated DLB from AD at an individual level with an high accuracy similar to that obtained with quantitative EEG (qEEG). GRDAfp alone could also differentiate DLB from PDD with a similar level of diagnostic accuracy. AD differed from PDD only for a slowing of FBA. The duration and severity of cognitive impairment did not differ between DLB patients with and without GRDAfp, indicating that this abnormal EEG pattern should not be regarded as a disease progression marker. Conclusions. The findings of this investigation revalorize the role of conventional EEG in the diagnostic workup of degenerative dementias suggesting the potential inclusion of GRDAfp alone or better coupled with the slowing of FBA and its reduced reactivity, in the list of supportive diagnostic biomarkers of DLB.

Quantitative gait analysis in patients with dementia with Lewy bodies and Alzheimer's disease

2007 ◽  
Vol 26 (3) ◽  
pp. 414-419 ◽  
Author(s):  
John R. Merory ◽  
Joanne E. Wittwer ◽  
Christopher C. Rowe ◽  
Kate E. Webster
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Gait Analysis ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies ◽  
Quantitative Gait Analysis

Anosognosia for memory in dementia with Lewy bodies compared with Alzheimer's disease

2021 ◽  
Author(s):  
Victor Calil ◽  
Andrea Silveira de Souza ◽  
Felipe Kenji Sudo ◽  
Gustavo Santiago‐Bravo ◽  
Naima Assunção ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies

scholarly journals Longitudinal assessment of global and regional atrophy rates in Alzheimer's disease and dementia with Lewy bodies

2015 ◽  
Vol 7 ◽  
pp. 456-462 ◽  
Author(s):  
Elijah Mak ◽  
Li Su ◽  
Guy B. Williams ◽  
Rosie Watson ◽  
Michael Firbank ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies ◽  
Longitudinal Assessment

A Detailed Phenomenological Comparison of Complex Visual Hallucinations in Dementia With Lewy Bodies and Alzheimer's Disease

1997 ◽  
Vol 9 (4) ◽  
pp. 381-388 ◽  
Author(s):  
Clive Ballard ◽  
Ian McKeith ◽  
Richard Harrison ◽  
John O'Brien ◽  
Peter Thompson ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Dementia With Lewy Bodies ◽  
Lewy Bodies ◽  
Time Of Day ◽  
Visual Hallucinations ◽  
Dementia Patients ◽  
Core Feature ◽  
Definition Of

Visual hallucinations (VH) are a core feature of dementia with Lewy bodies (DLB), but little is known about their phenomenology. A total of 73 dementia patients (42 DLB, 30 Alzheimer's disease [AD], 1 undiagnosed) in contact with clinical services were assessed with a detailed standardized inventory. DLB was diagnosed according to the criteria of McKeith and colleagues, AD was diagnosed using the NINCDS-ADRDA criteria. Autopsy confirmation has been obtained when possible. VH were defined using the definition of Burns and colleagues. Detailed descriptions of hallucinatory experiences were recorded. Annual follow-up interviews were undertaken. The clinical diagnosis has been confirmed in 18 of the 19 cases that have come to autopsy. A total of 93% of DLB patients and 27% of AD patients experienced VH. DLB patients were significantly more likely to experience multiple VH that persisted over follow-up. They were significantly more likely to hear their VH speak but there were no significant differences in the other phenomenological characteristics including whether the hallucinations moved, the time of day that they were experienced, their size, the degree of insight, and whether they were complete. VH may be more likely to be multiple, to speak, and to be persistent in DLB patients. These characteristics could potentially aid accurate diagnosis.

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