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Reduced awareness for apraxic deficits in left hemisphere stroke
Mona Kusch1, Sarah Gillessen1, Jochen Saliger2
1Department of Neurology, University Hospital Cologne.
Neuropsychology
|April 20, 2018
Summary
Left hemisphere strokes can impair awareness of both language (aphasia) and motor planning (apraxia) deficits. This study found patients often overestimated their abilities, indicating reduced awareness for these specific neurological impairments.
Area of Science:
- Neuroscience
- Neurology
- Cognitive Psychology
Background:
- Reduced awareness of neurological deficits is often linked to right-hemisphere damage.
- Emerging evidence suggests left-hemisphere (LH) strokes can also cause unawareness of impairments like aphasia.
Purpose of the Study:
- To investigate and characterize reduced awareness for apraxic and aphasic deficits in patients following an LH stroke.
Main Methods:
- Thirty-two patients with LH stroke underwent assessments for apraxia and aphasia.
- Patients rated their performance, and an unawareness score (UAS) was calculated by comparing self-ratings to examiner ratings.
Main Results:
- Patients with apraxia (n=14) and aphasia (n=16) significantly overestimated their performance.
- Awareness levels for apraxic deficits did not correlate with deficit severity and showed no difference between buccofacial and limb apraxia.
Conclusions:
- Left hemisphere strokes can lead to unawareness of both aphasic and apraxic deficits (limb and buccofacial).
- This highlights the potential for impaired self-monitoring of cognitive and motor functions following LH damage.
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