{
  "id": 3769399,
  "title": "Inhibitory Evoked Potentials as a Spatially Dependent Intraoperative Marker of Clinical Tremor Reduction",
  "url": "https://urgent.news/2026/08/27/inhibitory-evoked-potentials-as-a-spatially-dependent-intraoperative",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-27T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.24.746616v1?rss=1"
  },
  "original_language": "en",
  "account": "Deep brain stimulation (DBS) of the ventral intermediate nucleus (Vim) of the thalamus has been explored as a potential treatment for medication-refractory essential tremor. Previous research has indicated that evoked potentials, specifically quasi-evoked inhibition occurring about 2 milliseconds following high-frequency microstimulation pulses, may be associated with inhibitory synapses in the Vim. This study aimed to determine if quasi-evoked inhibition is linked to clinical tremor reduction and if its presence depends on the stimulation location within the Vim.\n\nBy creating a reliable method for identifying the presence or absence of quasi-evoked inhibition and employing accelerometer recordings, the researchers discovered that recordings showing quasi-evoked inhibition during 100 Hz microstimulation resulted in more significant tremor reduction compared to those without (p < 0.30). Additionally, the number of microstimulation pulses exhibiting quasi-evoked inhibition was found to correlate with tremor reduction (rho = 0.18, p = 0).\n\nFurthermore, the study utilized microelectrode trajectories generated from structural MRIs to analyze the proximity of stimulation sites to the ventral caudal border of the Vim. The findings revealed that stimulation locations closer to this border were more likely to demonstrate quasi-evoked inhibition and consequently, greater tremor reduction.",
  "summary": "Deep brain stimulation (DBS) of the ventral intermediate nucleus (Vim) of the thalamus may be used to treat medication refractory essential tremor. Using recordings from in vivo human Vim neurons, our previous work has suggested that evoked potentials (that we termed quasi-evoked inhibition) ~2 ms following high frequency microstimulation pulses may be related to inhibitory synapses onto the Vim.…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}