In this episode, Dr. Kai Miller (Neurosurgery) and Dr. Bryan Klassen (Neurology) from Mayo Clinic dive into the fundamentals of microelectrode recording (MER) and its role in deep brain stimulation (DBS) surgery.
Why Microelectrode Recording Still Matters
The ongoing debate of awake vs. asleep DBSWhether MER is “outdated” or still essential in the era of advanced imagingTheir philosophy: MER is a critical adjunct, not a replacement for high‑resolution MRIUsing high‑impedance microelectrodes to detect single‑neuron activityListening to real‑time firing patterns to confirm entry into specific brain structuresDifferentiating white matter vs. gray matter, nucleus boundaries, and disease‑related firing patternsMapping the Brain During Surgery
“Exploratory” vs. “confirmatory” MER approachesUsing the Ben Gun device for multi‑trajectory mappingUnderstanding firing signatures ofVoluntary movement‑related cell firingPassive movement sensory responsesTremor‑coherent neuronal firingVisual pathway confirmation using optic tract flashesWhy This Matters for Patient Outcomes
MER helps surgeons precisely place modern segmented DBS leads, which require millimeter‑level accuracyEnsures targeting of the most symptom‑relevant neural circuitsHelps avoid complications by identifying sensitive regions (e.g., sensory thalamus, optic tract)Importance of patient comfort and open interaction during awake DBSReal‑time teamwork between neurology, neurosurgery, and the OR staff