Page 429 - Complete Works of Dr. KCV Volume 1

"The evidences available suggest that the gland produces a hormone which helps to regulate the rate of bodily development and the onset of puberty'.
From Endocrinology - The glands and their functions by Hoskins, R. G. W. W. Norton and Co. inc. New York. 1950.
The pituitary gland in the body may correspond with the Ajna chakra the next highest chakra before the Sahasrara. In spite of this fact the pituitary may be studied in another connection viz. The Khechari Vidya, which involves stimulation of the akasa centre in the brain. Pro. Dakin describes the pituitary as the outgrowth from the mouth "This small organ (weighing only about 1/2 grm. in an adult man) appended to the under surface of the brain has for some time past been recognized as consisting of two parts and since one of these lies in front of the other, it was customary to speak of the glandular anterior lobe and a nervous posterior lobe. Not only is the structure of these parts visibly different, but their origin is also very different, for whilst this posterior part arises from the brain at an early stage; the anterior part is actually an upgrowth from the buccal or mouth cavity of the embryo. In fishes and amphibia it originates as a solid ingrowth from the surface in front of the mouth.) At an early stage it becomes separated from the mouth and applies to the downward process of the brain. The development of the cranium still further separates it from the mouth and thus we have the anomaly of the structure, which although it appears to be part of the brain is non-nervous in character (actually glandular) and whose origin in any individual is distinct from that of the brain." Thus the pituitary gland though situated in the brain is an outgrowth from the buccal cavity. This makes it possible for us to think of Khechari Vidya in this connection.
The Khechari Vidya involves the reversal of the tongue into the cavity of the brain in order (perhaps) to reach this outgrowth which has isolated itself leaving its embryonic parent. To achieve this end, the freanum lingui is cut by the Yogi and the tongue is made to go back into the cavity by gently pushing it into the buccal cavity and then still interior into the base of the brain, where there are the brahmarandhra (the third ventricle) and the Kapala vastra (either the thalamus or the optic chiasma which are full of nerve fibres.) Posterior to which is the pituitary gland at the base of the