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Influence of succinylcholine on middle component auditory evoked potentials
Archives of Otolaryngology (Chicago, Ill. : 1960)
|March 1, 1977
Summary
Auditory evoked potentials were unaffected by muscle paralysis, demonstrating they are not of myogenic origin. This research clarifies the source of these auditory responses in humans.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Electrophysiology
Background:
- Auditory evoked potentials (AEPs) are crucial for assessing auditory pathway function.
- The potential myogenic origin of middle-latency AEPs has been debated.
- Electromyography (EMG) provides a measure of muscle electrical activity.
Purpose of the Study:
- To investigate the myogenic contribution to middle-latency auditory evoked potentials.
- To differentiate between neural and muscular sources of AEPs.
Main Methods:
- Recording of middle-latency AEPs to 1,000-Hz tone pips in a normal-hearing adult.
- Simultaneous recording of EMG responses from hypothenar muscles following ulnar nerve stimulation.
- Data collection during resting, light sedation, and succinylcholine-induced skeletal muscle paralysis.
Main Results:
- Skeletal muscle paralysis abolished EMG responses.
- Auditory evoked potentials remained unchanged during muscle paralysis.
- Absence of change in AEPs during paralysis suggests a non-myogenic origin.
Conclusions:
- Middle-latency auditory evoked potentials are not of myogenic origin.
- This finding supports the neural basis of AEPs.
- Distinguishes AEPs from muscle-generated artifacts.