The muladhara chakra at the base of the spine is where kundalini is supposed to lie coiled awaiting to rise. Several factors led the ancients to this symbolic idea of the coiled serpent. First when kundalini does rise one of the initial pathways it takes seems to be around the spine between the two sympathetic trunks. The discharge of a double helix of energy can be felt rising up around the spine. Some people such as Gobi Krishna, call this a zigzag. For it appears that energy is flowing backwards and forwards up the ladder of the spine from ganglia to ganglia. I experienced this during a hypnogic vision around the time of my 1988 awakening. I imagine that energy is transmitted in this double helix fashion at the beginning of an awakening prior to the inner-conjunction through the sushumna nadi or central channel of the spine.
The coccygeal body is an irregular, oval-shaped gland between the rectal wall and the tip of the tailbone or coccyx. This is known in Tantra as the Kundalini gland. During active kundalini one can often feel a pulsation in the sacrum, I suspect that this rhythmic movement might be the kundalini gland becoming active.
The coccygeal gland is fed by sympathetic (adrenergic) from the first two ganglion and by parasympathetic (cholinergic) nerves; and by the median sacral artery and vein, directly influencing the nervous system via chemical messages arising from the blood. It is several millimeters in diameter and is composted of epithelioid cells and smooth muscle cells. A study suggests its possible blood forming function and an immune-modulatory activity by the regulation of the sympathetic nervous system through noradrenegenic control. Removal of this gland creates nervous derangement.
Because it is nexus of all the various bodymind systems: hormonal, blood, sympathetic and parasympathetic nerves and the immune system, the kundalini gland is key to the homeostasis of the body and to shifting metabolism over to the metamorphic state. Further study could lead science to discover that the kundalini awakening could be initiated or maintained by stimulation of the coccygeal body and the subsequent increase in the noradrenegenic mechanism of the SNS. If further studies confirm the possible involvement of the coccygeal body in the regulation of sexuality, this may explain the immunosuppressive status related to the sexual repression as previously suggested by Wilhelm Reich.
Yoga has devised a wide variety of techniques to irritate and awaken
this gland into activity: Including Mula Bandha (Root lock-contracting
perineum and lower abdomen), Asvini Mudra (contracting the
pubococcygeus muscle of perineum, as in kegel exercises), Tada
Mudra--(knocking the buttocks upon the ground, sending rhythmic shock
waves rippling up the spine) and rolling on a cotton ball placed under
the tip of the tail bone. (Found in Ecstasy Through Tantra, by Dr John Mumford).
A study of anatomy defies the traditional idea of ejaculation of
sexual “juices” up the spine, however the Nitric oxide and other
neurotransmitters that are used in sex would be directly involved in an
inner conjunction event. In fact the sex chemistry involved in an inner
conjunction is many many times greater than that which facilitates sex
itself. Although the entire body is flooded with sex and growth
hormones during the peak in which spinal inner-conjunctions occur and
this serves to rev up metabolism in which the energy can build to these
intense phase lock situations...I still cannot see how sexual juices
can enter into the cerebrospinal fluid. Instead I see the spinal fluid
becoming supercharged with glutamate, Ca2+ and other ions along with
Nitric oxide driving the maximim nerve activity. The fluid thus is
superfluid and supercharged, and doesn't necessarily "shoot" up the
spine, even though it feels like the force of 10,000 orgasms is
blasting directly up the spine. However, the liquid probably does flow
a little faster during the inner-conjunction event due to the increased
electromagnetic field, and increased cilli movement of the tissue that
moves cerebrospinal fluid (CSF) along (which is excited by the extra
nutrition, and ions of fluid and nerve energy at the time.)
Hence the intense upward pressure of an inner conjunction is not
caused by any fast moving ejaculation of liquid within the spine, so
much as by increase energy in the nerves. For CSF is moved via
hydrostatic pressure and cilli and is reputed to take 24 hours for a
full cycle and is completely changed every 6-7 hours. Thus I see the
amrita ejaculation of the fluid down the back of the throat more as a
brain-ejaculation (see...Amrita Heart Connection)...rather than fluid
that comes directly from the sex organs.
U.G. Krishnamurti talks about the cobra effect of the neck puffing out during acute prana flow (hence the ancient Egyptian symbol). The "carotid glands" are a reddish-brown oval body, in the top of the neck just below the ears. It is similar in structure to the kundalini gland (coccygeal gland). It is known that oxygen and carbon dioxide concentrations represent the main stimulus for the carotid body. Carbon monoxide as a gaseous neurotransmitter also appears to be involved in the regulation of chemosensors of carotid body which are regulated by molecular oxygen and inhibited by carbon monoxide.
The coccygeal and carotid glands seem to act as neutralizers of systemic poisons. The carotid gland cells produce dopamine, and this is significant to the understanding of their function.
"I do not want to be an exhibitionist, but you are doctors. There is something to the symbolism they have in India--the cobra. Yesterday was the new moon. The body is affected by everything that is happening around you. It is not separate from what is happening around you. Whatever is happening there is also happening here; there is only the physical response. This is affection. You can't prevent this, for the simple reason that the armor that you have built around yourself is destroyed [in the alchemy], so it is very vulnerable to everything that is happening there. With the phases of the moon--full moon, half moon, quarter moon--those swellings here take the shape of a cobra. Maybe the reason why some people have created all these images--Siva and all those kinds of things. But why should it take the shape of a cobra? I have asked many doctors why this swelling is here, but nobody could give me a satisfactory answer. I don't know if there are any glands or anything here." P.31, UG Krishnamurti, The Mystique of Enlightenment.
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