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Motor apraxia in dementia
1Department of Clinical Neurosciences, Western General Hospital, Edinburgh, UK.
Abstract:
Motor apraxia was assessed in 25 patients with presumed dementia of the Alzheimer type and 23 patients with presumed multi-infarct dementia. Apraxia was common in both groups and was usually only mild. It correlated most strongly with language-related impairments in the Alzheimer group, as has been found in other patient groups, whereas in the group with multi-infarct dementia the pattern of correlations was less clear. It was not strongly related to performance on tests involving constructional praxis or to age in either group. Implications of the findings for clinical assessment are noted.
Insights
Motor apraxia, a condition affecting movement, is common but mild in Alzheimer's and multi-infarct dementia. In Alzheimer's disease, it strongly relates to language issues, unlike in multi-infarct dementia.
Area of Science:
- Neurology
- Neuropsychology
Background:
- Motor apraxia is a frequently observed deficit in dementia.
- Understanding apraxia patterns aids differential diagnosis in dementia subtypes.
Purpose of the Study:
- To compare motor apraxia characteristics in Alzheimer's disease (AD) versus multi-infarct dementia (MID).
- To explore correlations between motor apraxia and other cognitive impairments in AD and MID.
Main Methods:
- Assessed motor apraxia in 25 patients with presumed AD and 23 with presumed MID.
- Correlated apraxia severity with language and constructional praxis performance, and age.
Main Results:
- Motor apraxia was common and typically mild in both AD and MID groups.
- In AD, motor apraxia strongly correlated with language impairments.
- In MID, the correlation pattern between motor apraxia and other impairments was less distinct.
Conclusions:
- Motor apraxia patterns may offer insights into differentiating AD from MID.
- Clinical assessment of dementia should consider motor apraxia, particularly its link to language deficits in AD.