I would posit that they're stimulating synaptogenesis and promoting functional connections to help counteract the loss of neurons as a result of the thalamic at

I would posit that they're stimulating synaptogenesis and promoting functional connections to help counteract the loss of neurons as a result of the thalamic atrophy. In other words, stimulating the existing neurons to make more connections with the neurons available to compensate for there being less neurons. However, I'm not a neuroscientist or neurologist.