Slow cortical potential biofeedback and the startle reflex.
The negativity of slow cortical potentials (SCP) of the surface EEG is a measure of brain excitability, correlating with motor and cognitive preparation. Self-control of SCP positivity has been shown to reduce seizure activity. Following SCP biofeedback from a central EEG electrode position, subjects gained bidirectional control over their SCP. The current study used a modified feedback methodology, and found a positive relationship between negativity and magnitude of EMG startle response (a measure of cortical and subcortical arousal, particularly aversive response disposition). Greater success in SCP differentiation was associated with self-report of less relaxation during negativity training.
Brody
S
S
University of Tübingen, Germany.
Rau
H
H
Köhler
F
F
Schupp
H
H
Lutzenberger
W
W
Birbaumer
N
N
D000328:Adult; D001676:Biofeedback, Psychology / Q000379:methods / Q000502:physiology*; D004569:Electroencephalography; D004576:Electromyography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D013216:Reflex, Startle / Q000502:physiology*