Long-term meditation is associated with increased gray matter density in the brain stem.
Extensive practice involving sustained attention can lead to changes in brain structure. Here, we report evidence of structural differences in the lower brainstem of participants engaged in the long-term practice of meditation. Using magnetic resonance imaging, we observed higher gray matter density in lower brain stem regions of experienced meditators compared with age-matched nonmeditators. Our findings show that long-term practitioners of meditation have structural differences in brainstem regions concerned with cardiorespiratory control. This could account for some of the cardiorespiratory parasympathetic effects and traits, as well as the cognitive, emotional, and immunoreactive impact reported in several studies of different meditation practices.
Neuroreport. 2009 Jan 28;20(2):170-4. Vestergaard-Poulsen P, van Beek M, Skewes J, Bjarkam CR, Stubberup M, Bertelsen J, Roepstorff A. Center for Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark. peterv@pet.auh.dk
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Romila Thapar writes in A History of India, volume one :
Yoga (Application) which was based on the control of the body physically and implied that
a perfect control over the body and the senses led to knowledge of the ultimate reality. A detailed anatomical knowledge of the human body was necessary to the advancement of yoga and therefore those practicing yoga had to keep in touch with medical knowledge.
Now I have described Practice of Meditation and Yoga using scientific terminology: Mind and brain are two distinct things. Brain is anatomical entity whereas mind is functional entity. Mind can be defined as the function of autonomic nervous system (ANS). It is claimed that mind can be brought under conscious control through the practice of meditation. But how? ANS is largely under hypothalamic control which is situated very close to optic chiasma (sixth chakra or ajna chakra). Protracted practice of concentration to meditate at this region brings functions of ANS say mind under one’s conscious control.
ANS is further divided into parasympathetic nervous system (PSNS) and sympathetic nervous system (SNS). On the basis of these facts I have discovered a mathematical relationship for spiritual quotient (S.Q.). Spiritual Quotient can be expressed mathematically as the ratio of Parasympathetic dominance to Sympathetic dominance. PSNS dominates during meditative calm and SNS dominates during stress. In this formula we assign numerical values to the physiological parameters activated or suppressed during autonomic mobilization and put in the formula to describe the state of mind of an individual and also infer his/her level of consciousness.
Meditation is the art of looking within and science of doing nothing. We don’t use anything in meditation. We just try to concentrate to meditate at some point in human anatomy known as ‘chakra’ in Indian System of Yoga. The current of mind is flowing outward through the senses and unconsciously. The mind comes at rest gradually through regular practice of meditation. Then comes self realization and enlightenment. Protracted practice of meditation under qualified guidance will help to manage all sort of psychological problems.
Emotional Quotient can also be expressed mathematically as the product of I.Q. and Wisdom Factor. E.Q. stands for Emotional Quotient. An intelligent person may not be wise. But a wise man will always be intelligent. An intelligent person having certain level of positive emotions can be said as wise. An intelligent person lacking wisdom will turn autocrat. A wise man will always be a democrat who respects others existence.
Some may raise doubt that how could be the Wisdom quantified? The answer is simple -if Mental Age of I.Q. can be quantified then Wisdom can also be quantified, of course, comparatively with more efforts. Wilhelm Stern had given the formula of I.Q.. It is, Mental Age/ Chronological Age x 100. Spiritual Quotient (S.Q.) leverages both E.Q. and I.Q.