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Brain Stimul ; 8(3): 481-5, 2015.
Article in English | MEDLINE | ID: mdl-25595064

ABSTRACT

BACKGROUND: Transcranial static magnetic field stimulation (tSMS) in humans reduces cortical excitability. OBJECTIVE: The objective of this study was to determine if prolonged tSMS (2 h) could be delivered safely in humans. Safety limits for this technique have not been described. METHODS: tSMS was applied for 2 h with a cylindric magnet on the occiput of 17 healthy subjects. We assessed tSMS-related safety aspects at tissue level by measuring levels of neuron-specific enolase (NSE, a marker of neuronal damage) and S100 (a marker of glial reactivity and damage). We also included an evaluation of cognitive side effects by using a battery of visuomotor and cognitive tests. RESULTS: tSMS did not induce any significant increase in NSE or S100. No cognitive alteration was detected. CONCLUSIONS: Our data indicate that the application of tSMS is safe in healthy human subjects, at least within these parameters.


Subject(s)
Cerebral Cortex/physiology , Transcranial Magnetic Stimulation/adverse effects , Adult , Attention/physiology , Cognition/physiology , Female , Humans , Magnetics , Male , Middle Aged , Neuropsychological Tests , Phosphopyruvate Hydratase/metabolism , Psychomotor Performance/physiology , S100 Proteins/metabolism , Safety , Verbal Behavior/physiology , Young Adult
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