Dr. Nick Gregg of the Mayo Clinic is mapping thalamic networks to create personalized neuromodulation therapies for drug-resistant epilepsy [1].

This research addresses a critical gap in neurology because seizure networks are unique to each patient. Standard approaches, such as conventional Deep Brain Stimulation (DBS), often fail because they utilize a one-target-fits-all method that does not account for individual anatomical differences [1].

Gregg's approach focuses on the thalamus, a central relay station in the brain. By mapping the specific connectivity of a patient's thalamic networks, clinicians can identify the precise location where neuromodulation will be most effective [1]. This level of precision is designed for patients who have not responded to traditional medication, or surgical interventions.

In one specific case, Gregg said a patient's seizures persisted even after undergoing surgery and standard DBS [1]. The failure of these traditional methods highlighted the necessity of a tailored approach. By utilizing connectivity mapping, the medical team can target the specific nodes of the seizure network rather than relying on generalized coordinates [1].

Neuromodulation involves the use of electrical or pharmaceutical agents to alter nerve activity. When these targets are personalized, the likelihood of suppressing seizure activity increases, reducing the burden on patients who have exhausted other medical options [1].

Gregg said the goal is to transition from generalized treatment protocols to a model of individualized precision medicine [1]. This shift requires advanced imaging and a deeper understanding of how the thalamus interacts with other cortical regions during an epileptic event [1].

“Seizure networks are unique to each patient.”

The shift toward personalized thalamic mapping represents a move away from 'atlas-based' neurology. By treating the brain as a unique network rather than a standard map, clinicians may be able to provide relief to the subset of epilepsy patients who are currently considered untreatable by standard surgical or stimulation methods.