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[Generalized nocifensor reflexes--II. A modified reflex pattern caused by functional disorders of the thalamus]
1Abteilung Neurologie der Klinik für Psychiatrie und Neurologie, Bereich Medizin der Wilhelm-Pieck-Universität Rostock.
EEG-EMG Zeitschrift Fur Elektroenzephalographie, Elektromyographie Und Verwandte Gebiete
|June 1, 1990
Summary
This study introduces a new method to assess supraspinal influences on nocifensive reflexes. Thalamic lesions enhance nocifensive responses, indicating altered brainstem activity.
Area of Science:
- Neuroscience
- Neurology
- Physiology
Context:
- Nocifensive reflex assessment traditionally focuses on reflex arc components.
- Supraspinal influences on pain modulation are complex and not fully understood.
- Previous diagnostic methods lacked the ability to differentiate supraspinal contributions.
Purpose:
- To develop a novel method for evaluating supraspinal influences on nocifensive reflexes.
- To investigate the role of the thalamus and formatio reticularis in nocifension.
- To correlate thalamic lesions with specific changes in nocifensive reflex patterns.
Summary:
- A new technique evokes global nocifensive reflexes, allowing assessment of supraspinal control.
- Pathohistologically confirmed thalamic lesions were found to de-inhibit the motor reticulospinal system.
- This results in a stronger, faster nocifensive reflex on the side contralateral to the thalamic lesion.
Impact:
- Provides a new diagnostic tool for evaluating supraspinal modulation of pain.
- Offers insights into the functional connectivity between the thalamus, brainstem, and nociception.
- Demonstrates a consistent phenomenon in patients with impaired thalamic function, aiding clinical diagnosis.