TO STUDY THE EFFECT OF YOGA NIDRA ON COGNITIVE FUNCTIONS BY RECORDING P3 AND N2 LATENCY IN MEDICAL STUDENTS.
Itika Singh, Beena* and Harminder Singh
ABSTRACT
Introduction- Yoga meaning union or one pointed awareness and Nidra meaning sleep. Yoga nidra has been
further proven to be the safest and surest methods to alter state of consciousness in humans.Cognition is obtaining,
organizing and using intellectual knowledge. It is a sequence of mental operations involving input and storage of
information along with recalling and processing relevant information from stored memory. Cognitive functions
can be assessed by event related potential. Material and method-Study was conducted in Physiology department;
Pt. B.D. Sharma PGIMS, Rohtak. Study included 30 healthy medical students in age group of 18-20 years who
served as their own controls. Observations- In males and females P3 and N2 latency was very highly significantly
reduced (p<0.001) in both ears after yoga nidra practice. Discussion-Latency of P3 and N2 waves offers insight
into cognitive events leading to stimulus engagement and response selection. Female subjects showed decreased
latency both before and after yoga nidra practice. Our results suggested that practice of yoga nidra leads to
improvement in cognitive functions. This improvement could be due to deep relaxation during yoga nidra.
Conclusion- Latency of P3 wave decreased remarkably after yoga nidra practice. This indicated an improvement
in time taken to identify and process stimuli. Latency of N2 wave also decreased in subjects post practice. This
indicated improvement in response selection.
Keywords: Yoga nidra, Cognition, Event related potential, P3, N2 latency.
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