▁brain . ▁E EG s ▁are ▁a ▁different ▁method ▁to ▁understand ▁the ▁elect rical ▁signal ing ▁in ▁the ▁brain ▁during ▁activation . ▁ ▁Mag net o ence phal ography ▁( ME G ) ▁is ▁another ▁method ▁of ▁meas uring ▁activity ▁in ▁the ▁brain ▁by ▁meas uring ▁the ▁magnetic ▁fields ▁that ▁arise ▁from ▁elect rical ▁curr ents ▁in ▁the ▁brain . ▁The ▁benefit ▁to ▁using ▁M EG ▁instead ▁of ▁E EG ▁is ▁that ▁these ▁fields ▁are ▁highly ▁local ized ▁and ▁give ▁rise ▁to ▁better ▁understanding ▁of ▁how ▁specific ▁lo ci ▁react ▁to ▁stim ulation ▁or ▁if ▁these ▁regions ▁over - activ ate ▁( as ▁in ▁ep ile ptic ▁se iz ures ). ▁ ▁Im plant ▁techn ologies ▁Ne uro dev ices ▁are ▁any ▁devices ▁used ▁to ▁monitor ▁or ▁reg ulate ▁brain ▁activity . ▁Currently ▁there ▁are ▁a ▁few ▁available ▁for ▁clin ical ▁use ▁as ▁a ▁treatment ▁for ▁Park inson ' s ▁disease . ▁The ▁most ▁common ▁ne uro dev ices ▁are ▁deep ▁brain ▁stim ul ators ▁( DB S ) ▁that ▁are ▁used ▁to ▁give ▁elect rical ▁stim ulation ▁to ▁areas ▁str icken ▁by ▁in activity . ▁Park inson ' s ▁disease ▁is ▁known ▁to ▁be ▁caused ▁by ▁an ▁in activ ation ▁of ▁the ▁bas al ▁gang lia ▁( n uc lei ) ▁and ▁recently ▁DB S ▁has ▁become ▁the ▁more ▁preferred ▁form ▁of ▁treatment ▁for ▁Park inson ' s ▁disease , ▁although ▁current ▁research ▁questions ▁the ▁efficiency ▁of ▁DB S ▁for ▁movement ▁dis orders . ▁ ▁Ne ur om od ulation ▁is ▁a