3. Medulla Oblongata: It is the beginning place of the spinal cord at the cranial cavity, where it is oblong-shaped and wide. It is between the two hemispheres. Here the white matter is placed over the grey matter. This contains the centres of important functions such as circulatory, respiratory, etc. This portion must be carefully protected.
4. Pons Varolii: It is the bridge that lies before the Medulla Oblongata. It is made of white and grey fibres that come from cerebellum and medulla. This is the junction where cerebellum and medulla meet.
There are five ventricles of the brain. The fourth is the most important one. It is situated in Medulla Oblongata. The fourth ventricle is the name of the central canal of the spinal cord, “Canalis Centralis” when it enters the cranial cavity. Here the tiny canal becomes bigger in size.
Every nerve of the body is closely connected with the brain. The 12 pairs of cranial nerves proceed from both hemispheres through the openings at the base of the skull to different parts of the body: Olfactory; Optic; Motor Oculi; Pathetic; Trifacial; Abducens; Facial; Auditory; Glossopharyngeal; Pneumogastric, Spinal accessory; and Hypo-glossal. These are the nerves that are connected with the eye, ear, tongue, nose, pharynx, thorax, etc. For a detailed study of this section refer to any book on anatomy. Here I have given you portions that are connected with Kundalini Yoga.
Brahmarandhra:
“Brahmarandhra” means the hole of Brahman. It is the dwelling house of the human soul. This is also known as “Dasamadvara,” the tenth opening or the tenth door. The hollow place in the crown of the head known as anterior fontanelle in the new-born child is the Brahmarandhra.
