Parkinson's...DBS vs stereotactic surgery targets

[Transformers]

In Parkinson's, my understanding is that the indirect pathway (inhibitory or slow movements) is in overdrive...aka:

Stn stimulating Gpi which inhibits the thalamus

In terms of surgical options, correct me if I am wring, but it seems to make sense for you to either knock out Stn or Gpi to let the thalamus stimulate movement.

Hence, stereotactic surgery aka pallidotomy or stn-removal would work.

For DBS, when I read online, why are the targets GPi and Stn and NOT the thalamus...aka why are you further "stimulating" the inhibitory component ....or am I mistaken and instead, does DBS "inhibit" the GPU and STn?

Thanks.

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