The Head Area, an overview with links
Posterior acupuncture points linked to brain:
Points GV20 and GV18 explained
GV20 is the Brahmarandhra and GV18 the Shivarandhra according to this very clear and simple explanation by Dr. Pradeep Ullal, Founder and Head of the Kevala Foundation:
|A diagram (source unknown) of the nadis concerned with enlightenment.|
The story in the head, as I understand it so far
From root to brow chakras Kundalini moves upward in a spiralling serpentine motion because (I think) it is accessing so many nadis and we can control Her using prana at this stage so ida and pingala are involved. There is a back and forth between ida and pingala as She ascends the sushumna like an electric current responding to positive and negative currents.
Once She reaches the brow and the soul, now identified with Kundalini, the Guide or Guru within, in the sincere seeker now seeks union with the collective "I" or Siva/Consciousness differentiated and even beyond to transcendence, Siva/Consciousness undifferentiated. Now the waves of mind (vrittis) need to stop in order to transcend that astral space and enter the causal. At this stage, as at any stage of spiritual advancement, the soul need grace. It doesn't just happen by force or will alone. The heart needs to be into it, devotional practice changes the soul's vibration. In fact all the chakras need to be purified. Just as one takes off ones dirty shoes before entering a Hindu temple, then by grace, Kundalini (the purified soul) casts off the astral/active mind and can enter in one movement the innermost sanctum of brahama nadi experiencing the silence of the causal field. This is where the aspirant begins to feel the crown chakra. The journey is not complete until Kundalini has pierced the brahmarandhra chakra and entered into the crown chakra. Laya Yoga mentions even more intermediary steps within the brow chakra.
|See bibliography - diagram from the book on Laya Yoga|