Neurobiological Component Report

Name	Brainstem auditory evoked potentials
Description	Brainstem Auditory evoked potentials (BAEPs) are very small electrical voltage potentials which are recorded in response to an auditory stimulus from electrodes placed on the scalp. They reflect neuronal activity in the auditory nerve, cochlear nucleus, superior olive and inferior colliculus of the brainstem. They typically have a response latency of no more than six milliseconds with an amplitude of approximately one millivolt. Due to their small amplitude 500 or more repetitions of the auditory stimulus are required in order to average out the random background electrical activity. Although it is possible to obtain a BAEP to a pure tone stimulus in the hearing range a more effective auditory stimulus contains a range of frequencies in the form of a short sharp click.
No. of Studies (Positive/Negative)	1 (1/0)

Name in Literature	Reference	Research Type	Statistical Result	Relation Description
auditory evoked potential	Fitzgerald, 2009	patients and normal controls		The melancholic patients had a significantly shallower audit...... The melancholic patients had a significantly shallower auditory evoked potential (IDAEP) slope than the non-melancholic patients not explained by depression severity or age. More...

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