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Evoked potentials in shoe-workers with minimal polyneuropathy.
G Nolfe1, V Palma, M Guadagnino
1Università degli Studi di Milano, Milan, Italy.
Electromyography and Clinical Neurophysiology
|April 1, 1991
Summary
This study found early central nervous system damage in shoe workers exposed to industrial solvents. Multimodal evoked potentials revealed nerve signal abnormalities, suggesting their use for screening neurotoxic exposure.
Area of Science:
- Neuroscience
- Toxicology
- Occupational Health
Background:
- Chronic exposure to low-level industrial solvents can lead to subtle central nervous system (CNS) impairments.
- Early detection of neurotoxicity is crucial for preventing irreversible neurological damage.
Purpose of the Study:
- To investigate early CNS impairments in individuals with prolonged exposure to low toxic levels of industrial solvents.
- To evaluate the utility of multimodal evoked potentials in detecting neurotoxic effects.
Main Methods:
- A study group of 15 shoe workers with minimal polyneuropathy symptoms and 20 healthy volunteers were recruited.
- Multimodal evoked potentials, including visual evoked potentials (VEP), somatosensory evoked potentials (SEP), and brainstem auditory evoked potentials (BAEP), were performed.
- Nerve conduction velocity (NCV) from wrist to Erb's point was also measured.
Main Results:
- VEP and SEP amplitudes were decreased in the shoe worker group compared to controls.
- A higher percentage of patients exhibited a BAEP V/I ratio between 0.5 and 1.
- Lowered wrist-to-Erb's point conduction velocity was observed in the exposed subjects.
Conclusions:
- Multimodal evoked potentials can detect early subclinical neurological deficits caused by industrial solvent exposure.
- Systematic use of evoked potentials is recommended for screening individuals exposed to neurotoxic industrial solvents.
- These findings highlight the importance of occupational health monitoring for solvent-exposed workers.