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The head retraction reflex--its specificity in Parkinson's disease
Clinical Neurology and Neurosurgery
|January 1, 1982
Summary
The head retraction reflex, an involuntary neck extension, is significantly more common in Parkinson's disease patients. Its presence correlates with disease severity, suggesting a specific link to Parkinson's pathology.
Area of Science:
- Neurology
- Neuroscience
- Movement Disorders
Background:
- The head retraction reflex involves neck extension upon upper lip stimulation.
- Its prevalence in neurological conditions is not well-established.
Purpose of the Study:
- To investigate the presence and significance of the head retraction reflex in Parkinson's disease.
- To differentiate the reflex's association with Parkinson's disease from aging and dementia.
Main Methods:
- Assessed the head retraction reflex in patients with Parkinson's disease, normal controls, and individuals with senile dementia.
- Correlated reflex presence with Parkinson's disease severity.
Main Results:
- The reflex was present in 17.2% of Parkinson's disease patients, versus 4.9% of controls and 8% with dementia.
- A positive correlation was observed between Parkinson's disease severity and the reflex's presence.
Conclusions:
- The head retraction reflex is a potential indicator specifically associated with Parkinson's disease.
- This reflex is unlikely to be solely due to aging or the presence of dementia.