Why does deep brain stimulation for epilepsy target the thalamus? · Grey Matter

The thalamus is a hub through which seizures spread: its anterior nucleus sits in the circuit linking the hippocampus to the cingulate cortex, so stimulating one small target can influence the wide network that focal seizures, especially temporal ones, travel through.

Why does deep brain stimulation for epilepsy target the thalamus?

The thalamus is a hub through which seizures spread: its anterior nucleus sits in the circuit linking the hippocampus to the cingulate cortex, so stimulating one small target can influence the wide network that focal seizures, especially temporal ones, travel through. In the randomised trial that led to approval, stimulation of the anterior nucleus reduced seizures 29 % more than sham during the blinded months, and after two years the median reduction was 56 %. The mechanism is still debated, with disruption of the rhythms that recruit the network and gradual changes in the circuit as the main candidates.