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Deep brain stimulation (DBS) is used to alleviate chronic pain. Using magnetoencephalography (MEG) to study the mechanisms of DBS for pain is difficult because of the artefact caused by the stimulator. We were able to record activity over the occipital lobe of a patient using DBS for phantom limb pain during presentation of a visual stimulus. This demonstrates that MEG can be used to study patients undergoing DBS provided control stimuli are used to check the reliability of the data. We then asked the patient to rate his pain during and off DBS. Correlations were found between these ratings and power in theta (6-9) and beta bands (12-30). Further, there was a tendency for frequencies under 25 Hz to correlate with each other after a period off stimulation compared with immediately after DBS. The results are interpreted as reflecting abnormal thalamocortical dynamics, previously implicated in painful syndromes.

Original publication

DOI

10.1016/j.jocn.2008.03.004

Type

Journal article

Journal

J Clin Neurosci

Publication Date

01/2009

Volume

16

Pages

32 - 36

Keywords

Adult, Brain Mapping, Cerebral Cortex, Deep Brain Stimulation, Evoked Potentials, Visual, Female, Fourier Analysis, Humans, Magnetoencephalography, Pain, Pain Management, Pain Measurement, Phantom Limb, Photic Stimulation, Thalamus