▁research ▁so ▁interesting ▁in ▁the ▁neu ros cience ▁community ▁is ▁that ▁it ▁can ▁target ▁specific ▁regions ▁of ▁the ▁brain ▁and ▁shut ▁them ▁down ▁or ▁activ ate ▁tempor arily ; ▁thereby ▁changing ▁the ▁way ▁the ▁brain ▁behav es . ▁Person ality ▁dis orders ▁can ▁stem ▁from ▁a ▁variety ▁of ▁external ▁factors , ▁but ▁when ▁the ▁dis order ▁st ems ▁from ▁the ▁circuit ry ▁of ▁the ▁brain ▁T MS ▁can ▁be ▁used ▁to ▁de activ ate ▁the ▁circuit ry . ▁This ▁can ▁give ▁rise ▁to ▁a ▁number ▁of ▁responses , ▁r anging ▁from ▁“ normal ity ” ▁to ▁something ▁more ▁unexpected , ▁but ▁current ▁research ▁is ▁based ▁on ▁the ▁theory ▁that ▁use ▁of ▁T MS ▁could ▁rad ically ▁change ▁treatment ▁and ▁perhaps ▁act ▁as ▁a ▁c ure ▁for ▁person ality ▁dis orders ▁and ▁hall uc in ations . ▁Currently , ▁repet itive ▁trans c ran ial ▁magnetic ▁stim ulation ▁( r T MS ) ▁is ▁being ▁research ed ▁to ▁see ▁if ▁this ▁de activ ation ▁effect ▁can ▁be ▁made ▁more ▁permanent ▁in ▁patients ▁suffering ▁from ▁these ▁dis orders . ▁Some ▁techniques ▁combine ▁T MS ▁and ▁another ▁sc anning ▁method ▁such ▁as ▁E EG ▁to ▁get ▁additional ▁information ▁about ▁brain ▁activity ▁such ▁as ▁cort ical ▁response . ▁ ▁Both ▁E EG ▁and ▁M EG ▁are ▁currently ▁being ▁used ▁to ▁study ▁the ▁brain ' s ▁activity ▁under ▁different ▁conditions . ▁Each ▁uses ▁similar ▁principles ▁but ▁allows ▁research ers ▁to ▁examine ▁individual ▁regions ▁of ▁the ▁brain , ▁allowing ▁isol ation ▁and ▁potentially ▁specific ▁classification ▁of ▁active ▁regions .