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Visual and brain stem auditory evoked responses in opioid dependence
1Department of Neurology, Neurosciences Centre, All Institute of Medical Sciences, New Delhi, India.
Neurology India
|March 8, 2018
Summary
Opioid dependence impairs brain function, significantly reducing visual evoked response (VER) amplitude and delaying brain stem auditory evoked response (BAER) wave latencies. These findings suggest compromised neural pathways in opioid-dependent individuals.
Area of Science:
- Neuroscience
- Clinical Neurology
Background:
- Opioid dependence is a significant public health issue with known neurological consequences.
- Previous research indicates potential alterations in central nervous system function among opioid-dependent individuals.
Purpose of the Study:
- To investigate neurophysiological differences in opioid-dependent individuals compared to controls.
- To assess visual and auditory pathway integrity using evoked potentials.
Main Methods:
- Visual evoked response (VER) and Brain stem auditory response (BAER) were conducted.
- 19 opioid-dependent subjects were compared with 20 age-matched healthy controls.
Main Results:
- Opioid-dependent subjects showed a significant decrease in VER amplitude (P<0.001).
- Prolonged latencies for BAER waves III, V, and inter-peak latencies (I-III, III-IV, I-V) were observed in opioid-dependent subjects.
- These results indicate impaired auditory conduction within the brain stem.
Conclusions:
- Opioid dependence is associated with significant neurophysiological abnormalities in both visual and auditory pathways.
- Evoked potential testing can reveal subclinical neurological deficits in opioid-dependent populations.
- Findings suggest impaired brain stem auditory conduction in individuals with opioid dependence.
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