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The Flip Side of Distractibility-Executive Dysfunction in Functional Movement Disorders
Anne-Catherine M L Huys1, Kailash P Bhatia1, Mark J Edwards2
1Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, United Kingdom.
Frontiers in Neurology
|October 12, 2020
Summary
Patients with functional movement disorders show impaired executive attention, suggesting this executive dysfunction is a key feature. This may explain associated concentration issues and fatigue in these patients.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Attention significantly influences functional neurological disorders (FNDs).
- Symptom exacerbation correlates with increased attention, while distraction can lead to improvement.
- Understanding attentional deficits is crucial for FNDs.
Purpose of the Study:
- To investigate attentional network function, specifically alerting, orienting, and executive control, in functional movement disorders (FMDs).
Main Methods:
- Employed the Attention Network Test (ANT).
- Compared 30 FMD patients, 30 organic movement disorder patients, and 30 healthy controls.
Main Results:
- Alerting and orienting functions were comparable across all groups.
- Patients with FMDs exhibited abnormal executive control of attention, particularly under conflict conditions, compared to organic movement disorder patients and controls.
Conclusions:
- Executive dysfunction is a significant secondary characteristic of FMDs.
- This dysfunction may arise from excessive attentional resource allocation to explicit movement control.
- Findings offer a potential explanation for common FMD symptoms like fatigue and concentration difficulties.
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