Intensity dependence of auditory evoked potentials distinguish participants with unmedicated depression from non-depressed controls.

Depression is a heterogeneous syndrome that impacts an individual's emotional, social, cognitive and bodily functioning. Depression is associated with biases in emotional processing, but alterations in basic sensory processing have received less attention in depression research. Here, we measured event-related potentials (ERPs) in response to changes in the intensity of auditory stimuli and the location of somatosensory stimuli in participants with depression and in non-depressed control participants.

Auditory event-related potentials in separating patients with depressive disorders and non-depressed controls: A narrative review.

This narrative review brings together the findings regarding the differences in the auditory event-related potentials (ERPs) between patients with depressive disorder and non-depressed control subjects. These studies' results can inform us of the possible alterations in sensory-cognitive processing in depressive disorders and the potential of using these ERPs in clinical applications. Auditory P3, mismatch negativity (MMN) and loudness dependence of auditory evoked potentials (LDAEP) were the subjects of the investigation.

Ketamine and norketamine attenuate oxycodone tolerance markedly less than that of morphine: from behaviour to drug availability.

Background: Ketamine attenuates morphine tolerance by antagonising N-methyl-d-aspartate receptors. However, a pharmacokinetic interaction between morphine and ketamine has also been suggested. The interaction between oxycodone and ketamine is unclear.