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TMS (determining the spatial resolution / selectivity of stimulation…
TMS
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safety issues
risk of inducing epileptic seizures (with rTMS, stimulation frequency a crucial parameter)
persistent physiological changes - kindling - induction of epileptic seizures through repeated administration of normally subconvulsive TMS
stimulation intensity
motor threshold (lowest stimulation intensity that produces motor evoked potential in abductor pollicis brevis muscle in 50% of pulses
however, MT inappropriate as reference for the excitability of visual cortices
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key principle: TMS coil delivers electric current which creates magnetic field which induces electric field in an area of the brain - stimulate neutrons, changing resting membrane potentials
mechanism of interference - inducing "neural noise" that interferes with neural activity associated with task performance
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