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(Sanskrit नाडी nāḍī = tube, pipe; Tamilnaadi) நாடி = nerve, blood vessel, pulse) are a term for the channels through which, in traditional Indian medicine and spiritual science, the energies of the physical body, the subtle body and the causal body are said to flow. Within this philosophical framework, the nadis are said to connect at special points of intensity called nadichakras. The concepts of a subtle body and a causal body are not recognised terms used in conventional science or medicine.〔"''Light on Pranayama''" (''Ch. 5: Nadis and Chakras'')〕 The word "nadi" is pronounced as "nāḍī", with long vowel sounds and a retroflex 'd'. They are an important concept in Hindu philosophy and are mentioned and described in numerous texts going back about 3,000 years to the earliest scriptures. All texts explains that there are a large amount of nadis present in the human bodies, some claims hundred-of-thousands, some millions. In regard to Kundalini yoga, there are three important nadis: ''ida'', ''pingala'', and ''sushumna''. ''Ida'' (इडा, iḍā) lies to the left of the spine, whereas ''pingala'' (पिङ्गल, piṅgala) is to the right side of the spine, mirroring the ida. ''Sushumna'' (सुषुम्णा, suṣumṇā) runs along the spinal cord in the center, through the seven chakras – Muladhara at the base, and Sahasrara at the top (or crown) of the head. Under the correct conditions the energy of kundalini is said to uncoil and enter sushumna through the ''brahma dwara'' or gate of Brahma at the base of the spine. == Early references == Several of the ancient Upanishads use the concept of nadis (channels). An early version of the nadi system is mentioned in the Chandogya Upanishad (among several others), which is believed to be about 3,000 years old, comparing and connecting them with the rays of the Sun. When discussing what happens after death for the enlightened, Chandogya Upanishad states: "A hundred and one are the arteries of the heart, one of them pierces the crown of the head. Going upward through that, one becomes immortal at death. Other arteries, going in different directions, only serve as channels for his departure from the body, ..." (CU 8.6.6)〔For reference to Chandogya Upanishad 8.6.6 and interpretation as an early form of the occult physiology see: McEvilley, Thomas. "The Spinal Serpent", in: Harper and Brown, p.94.〕 The contemporary Prasna Upanishad reveals a bit more: ''3.6'' "In the heart verily is ''Jivātma''. Here a hundred and one ''nāḍis'' arise. For each of these nāḍis there are one hundred ''nāḍikās''. For each of these there are thousands more. In these ''Vyâna'' moves." The later Varaha Upanishad further describes the nadis in Hindu philosphical terms as follows: "The nāḍis penetrate the body from the soles of the feet to the crown of the head. In them is ''prāṇa'', the breath of life and in that life abides ''Ātman'', which is the abode of ''Shakti'', creatrix of the animate and inanimate worlds." (VU 54/5)〔Varahopanisad V, 54/5.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nadi (yoga)」の詳細全文を読む スポンサード リンク
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