▁stress ors ▁or ▁d ys functions . ▁Real - time ▁functional ▁M RI ▁is ▁a ▁revolution ary ▁tool ▁available ▁to ▁ne uro log ists ▁and ▁neu ros cient ists ▁because ▁patients ▁can ▁see ▁how ▁their ▁brain ▁react s ▁to ▁stress ors ▁and ▁can ▁perce ive ▁visual ▁feedback . ▁CT ▁sc ans ▁are ▁very ▁similar ▁to ▁M RI ▁in ▁their ▁academic ▁use ▁because ▁they ▁can ▁be ▁used ▁to ▁image ▁the ▁brain ▁upon ▁injury , ▁but ▁they ▁are ▁more ▁limited ▁in ▁per cept ual ▁feedback . ▁CT s ▁are ▁generally ▁used ▁in ▁clin ical ▁studies ▁far ▁more ▁than ▁in ▁academic ▁studies , ▁and ▁are ▁found ▁far ▁more ▁often ▁in ▁a ▁hospital ▁than ▁a ▁research ▁facility . ▁P ET ▁sc ans ▁are ▁also ▁finding ▁more ▁relev ance ▁in ▁academ ia ▁because ▁they ▁can ▁be ▁used ▁to ▁observe ▁met abol ic ▁u pt ake ▁of ▁neur ons , ▁giving ▁research ers ▁a ▁wider ▁perspective ▁about ▁neural ▁activity ▁in ▁the ▁brain ▁for ▁a ▁given ▁condition . ▁Com bin ations ▁of ▁these ▁methods ▁can ▁provide ▁research ers ▁with ▁knowledge ▁of ▁both ▁phys i ological ▁and ▁met abol ic ▁behav iors ▁of ▁lo ci ▁in ▁the ▁brain ▁and ▁can ▁be ▁used ▁to ▁explain ▁activation ▁and ▁de activ ation ▁of ▁parts ▁of ▁the ▁brain ▁under ▁specific ▁conditions . ▁ ▁Trans c ran ial ▁magnetic ▁stim ulation ▁is ▁a ▁relatively ▁new ▁method ▁of ▁studying ▁how ▁the ▁brain ▁functions ▁and ▁is ▁used ▁in ▁many ▁research ▁l abs ▁focused ▁on ▁behavior al ▁dis orders ▁and ▁hall uc in ations . ▁What ▁makes ▁T MS