1. A stage where I sometimes feel a tingling sensation on the skin of my forehead (a subtle dimension, a state where the physical ether is slightly moving).
2. A stage where my aura sometimes vaguely fills my entire head (especially after doing yoga asanas or pranayama breathing techniques).
3. After the ida and pingala channels begin to move, the feeling of my aura filling my entire head has become stronger than before, but there is still a boundary sensation below and above the throat chakra (vishuddha).
4. After passing through the throat chakra (vishuddha), my aura begins to fill my entire head more clearly.
5. When the consciousness of creation, destruction, and preservation (the so-called ordinary higher self) wells up from the depths of my chest, my aura throughout my head is also more activated than before, but that consciousness from my chest has not yet filled my head.
6. The consciousness connected from my chest stabilizes, rises, and partially fills my head, partially opening the sahasrara chakra. In this state, the route through which the aura of consciousness rises mainly from the back of my head has passed, but it is a narrow route that is easily blocked. I am in a stage of meditating for a long time to raise the aura of consciousness from the back of my head to the sahasrara chakra, and occasionally opening the sahasrara chakra.
7. When the Purusha (divine spirit) strongly pushes the route at the back of my head, as if to widen it, and passes through the throat and along the energy channels (the so-called Sushumna) of my spine to the small chamber in the depths of my chest, the back of my head is not yet fully open.
8. The Purusha (divine spirit) that has settled in the depths of my chest gradually tries to re-enter from the top of my head through the Sushumna, but since the back of my head is not properly open, the aura strongly pushes against the top of my head, causing my body to become unstable. I am in a stage of repeatedly meditating to properly open the back of my head, and then lowering that aura through the back of my head and the throat chakra (vishuddha) to the anahata in my chest and the manipura in my abdomen, to properly fuse the aura.
9. As the aura of Purusha becomes established, that aura begins to reach the top of my head, and my head suddenly begins to loosen (expand?). At this stage, the energy routes in various parts of my head are relatively opened.
10. Frontal lobe (April 4th). At this stage, the flow of energy around my forehead and the frontal lobe has improved. At that time, I think the routes were open in the front and top of my head. (However, this part is still prone to reverting to its previous state, and it is probably disconnected because it is not connected to the anahata in my chest. After that, it became less active, but it was reactivated after the center of my head opened.)
11. Lower jaw (April 5th): (Until then, my speech had been bad, but it suddenly improved to a normal state.) At this point, it felt like the energy was flowing through a path from the throat to the lower part of the head.
12. From the center of the back of the head to the hairline, and the top of the head (inner side) (April 14). At this point, it seemed that the energy route passed from the back of the head to the top of the head.
13. Center of the head (April 18th). At this point, I felt that a pathway had opened from the space between the eyebrows, through the center of the head, to the Vishuddha in the throat. This seems to have reactivated each part of the head overall, resolving fragmentation. There are still some lumps that remain, and the pattern is still uneven, but basically, the entire head seems to have become activated.
14. (In the future), the thorough implementation, stabilization, and further activation of this state are the next challenges.
A diagram that is relatively close to this route is included in the "Flower of Life" book, so I am quoting it for your reference.
In this diagram, the connection from the throat to the back of the head is not shown, but in the general understanding of yoga, the Sushumna, which runs along the spine, is said to extend relatively straight. Both seem to show a certain truth. It would be good to add a line from the throat to the back of the head in this diagram. The back of the head is a place that is somewhat understandable and somewhat unclear, so I understand why it is expressed as "half a step" in that book. I think that might be the case.
Within this diagram, I feel that I have experienced a certain flow from the body, through the neck, and up to the area around the eyebrows. I feel that energy enters through the area between the eyebrows, and that energy channels (nadis) pass through the throat, reaching the Anahata in the chest and the Manipura in the abdomen. This feeling became more pronounced, especially after the area around the middle of the head relaxed and the pulse beat became noticeable.
Probably, this is different for each stage. Initially, it may simply rise relatively straight through the Sushumna. And, at a certain stage, a route like the Flower of Life may appear. By the way, in books related to the White Brotherhood, there is also a description of a route from the area between the eyebrows to the back of the head, and there are also such stories in yoga, so it may be that this route becomes important at a certain stage.
In my case, it doesn't feel like everything is completely activated yet, but overall, I think it is something like this.
Until I reached this point, the meaning of the Flower of Life diagram mentioned above was something that I understood but didn't quite understand. Now, I finally feel that I understand the meaning and that it is like that in terms of experience.