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Computational and Mathematical Methods in Medicine
Volume 2015 (2015), Article ID 821061, 13 pages
Research Article

Cognitive Behavior Evaluation Based on Physiological Parameters among Young Healthy Subjects with Yoga as Intervention

1Faculty in E & CE Department, Poojya Doddappa Appa College of Engineering, Kalaburagi 585 102, India
2Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India
3Moradabad Institute of Technology, Moradabad 244 001, India

Received 20 August 2014; Revised 27 December 2014; Accepted 1 January 2015

Academic Editor: Irena Cosic

Copyright © 2015 H. Nagendra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. To investigate the effect of yoga practice on cognitive skills, autonomic nervous system, and heart rate variability by analyzing physiological parameters. Methods. The study was conducted on 30 normal young healthy engineering students. They were randomly selected into two groups: yoga group and control group. The yoga group practiced yoga one and half hour per day for six days in a week, for a period of five months. Results. The yoga practising group showed increased α, β, and δ EEG band powers and significant reduction in θ and γ band powers. The increased α and β power can represent enhanced cognitive functions such as memory and concentration, and that of δ signifies synchronization of brain activity. The heart rate index decreased, neural activity β/θ increased, attention resource index increased, executive load index decreased, and the ratio decreased. The yoga practice group showed improvement in heart rate variability, increased SDNN/RMSSD, and reduction in LF/HF ratio. Conclusion. Yoga practising group showed significant improvement in various cognitive functions, such as performance enhancement, neural activity, attention, and executive function. It also resulted in increase in the heart rate variability, parasympathetic nervous system activity, and balanced autonomic nervous system reactivity.