Pain Clinical Trial
Official title:
Neural Correlates of Lidocaine Analgesia
The purpose of this study is to characterize the effects of intravenous lidocaine on pain processing and cognitive function. Functional magnetic resonance imaging will be used to identify the neural correlates of these phenomena. The study will consist of 1 visit and involves no long-term follow up.
This is an observational cohort study of volunteer subjects, which will employ neuroimaging and behavioral measures to characterize the effects of intravenous lidocaine on pain processing and cognitive function. A steady-state effect-site concentration of lidocaine will be achieved, and a short battery of cognitive behavioral tasks will be employed. At the dose target, pain task functional MRI and resting-state connectivity will be determined. This work will use a systems neuroscience approach to fill an important knowledge gap about the central effects of intravenous lidocaine, a commonly-used opioid alternative analgesic agent. Aim1: Determine cognitive behavioral effects of a steady-state dose of IV lidocaine using a short battery of tasks. The investigators hypothesize that the administration of lidocaine will correlate to decreased pain ratings, slowed psychomotor response, and decreased memory encoding. Aim2: Determine the neural effects of a steady-state dose of IV lidocaine in response to acute pain, and on resting connectivity. The investigators hypothesize that pain task-related activation will decrease in the insula and anterior cingulate, corresponding to decreased ratings of pain intensity and unpleasantness. Additionally, the investigators expect widespread decreases in long-range functional connectivity between brain areas know to be involved in these two areas and other known to be involved in pain processing. ;
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