Abstract
The effects of visual stimuli on cardiac autonomic activity using Heart Rate Variability (HRV)was studied in 50 healthyadult males. Beat tobeat R-R intervals were cotinuously recorded under closed eye condition (CEC) and the open eye condition(OEC). HRV frequency domain parameters like LF nu, HF nu, LF/HF were obtained with the helpof RMS polyrite-D version 3.0.11. There was a significant (p<0.05) decrease in HF nu in OEC when compared to CEC, and a significant(p<0.05)increase in LF nu and LF-HF ratio in OEC when compared to CEC. Indicating increased sympathetic activity and reduced parasympathetic activity in OEC1.
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