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Preksha Dhyana:
of fhe body can be known to a sadhak alone. A doctor or a brilliant surgeon would not be able to unravel those mysteries which are known to spiritual masters. For instance, a doctor would not be able to enlighten us about the effect of breathing through the right nostril or the left nostril or both nostrils. The effect is definite in each casebreathing through the left results in cooling, and breathing through the right results in heating, and breathing through both results in quietening the mind and creating mental equilibrium. It is perhaps beyond the scope of a physician or a surgeon to explain why and how this happens. Only a master of meditation can throw proper light on the subject.1
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1. There are various channels for the flow and distributian of prana called nāḍīs. Of these, three nadis emanate from sakti kendra (also called mūļādhārachakra) at the base of the spinal column and lie along side the spinal column. They are ida, pingala and suşumnă. Ida flows along the leftside of the spinal column and pingala on the right. Idā passes through the left nostril and enters the right cerebral hemisphere. Pingalā passes through the right nostril and enters the left cerebral hemisphere. Iḍa which is also known as chandra nāḍī carries the negative energy which is cold; pingalā, known as surya nādi, carries the positive energy which is hot. When the breath from the left nostril is stronger, the body will be cooled and when it is stronger from the right one, the body will be heated up. When the breath from both nostrils is completely equalised, prana flows through susumna and results in mental peace and equilibrium. In scientific terms. Iḍā activates the parasympathetic nerve while pingală activates the sympathetic nerve. Thus the effects of iḍa and pingală are mutually antagonisitic. They are given in a tabular form for convenience.
SUSUMNĂ
Jñana Kendra (Sahasrara Chakra). Direct to cerebral cortex
IDA
Left Nostril
Right cerebral hemis
sphere
PINGALA Right Nostril
Jain Education International
Left cerebral hemisphere
Sympathetic
Para-sympathetic
Reduced blood-pressure, Increased blood
blood-sugar, heart-rate, respiration etc.
pressure, bloodsugar, heart-rate respiration, etc. Highly emotional excited state Highly active
Calm, unexcited state
Physical inactivity, lassitude.
Cool, negative
Hot, positive.
Homeostasis
Mental peace
Psychic perception
Tranquillity
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