Fig. 14

Schematic diagram show the process of DBS. In DBS, STN or thalamus or the globus pallidus interna (Gpi) (in this case STN) are stimulated by an implanted apparatus contains batteries that produce electrical stimulation (like a pace-maker). Stimulating the STN can activate the GPi, which can strongly inhibit the thalamus (right side circuitry) which can activate the motor cortex; in turn, allowing more control into the movement of limbs