Does smoking affect cortical auditory evoked potentials in young adults?

Area of Science:

• Neuroscience
• Auditory Neuroscience
• Toxicology

Background:

• Cigarette smoking exerts vascular and neurotoxic effects.
• These effects may impact auditory function.
• Cortical auditory evoked potentials (CAEPs) detect central auditory changes beyond peripheral hearing limits.

Purpose of the Study:

• To determine if smoking influences CAEP responses in young adults.
• Participants had normal pure-tone hearing thresholds.

Main Methods:

• Cross-sectional study of 47 young adults (18-25 years).
• Smoker (n=26) and non-smoker (n=21) groups with normal hearing.
• CAEPs recorded using 1 kHz tone-burst stimuli; P1, N1, P2 latencies and P1-N1, N1-P2 amplitudes analyzed.

Main Results:

• Smokers exhibited significantly prolonged right-ear P1 latency.
• Smokers showed reduced bilateral P1-N1 and N1-P2 amplitudes compared to non-smokers.

Conclusions:

• Smoking is linked to prolonged P1 latencies and reduced amplitudes in normal-hearing young adults.
• Findings suggest early thalamocortical pathway disruption due to smoking.
• CAEPs serve as sensitive indicators of subclinical auditory dysfunction from tobacco use.