“Enq: You spoke of Kama-loka, what is it?
Theo: When the man dies, his lower three principles leave him forever; i.e., body, life, and the vehicle of the latter, the astral body or the double of the living man.
And then, his four principles – the central or middle principle, the animal soul or Kama-rupa, with what it has assimilated from the lower Manas, and the higher triad find themselves in Kama-loka.
The latter is an astral locality, the limbus of scholastic theology, the Hades of the ancients, and, strictly speaking, a locality only in a relative sense.
It has neither a definite area nor boundary, but exists within subjective space; i.e., is beyond our sensuous perceptions. Still it exists, and it is there that the astral eidolons of all the beings that have lived, animals included, await their second death.
For animals it comes with the disintegration and the entire fading out of their astral particles to the last. For the human eidolon it begins when the Atma-Buddhi Manasic triad is said to “separate” itself from its lower principles, or the reflection of the ex-personality, by falling into the Devachanic state.
Enq: And what happens after this?
Theo: Then the Kama-rupic phantom, remaining bereft of its informing thinking principle, the higher Manas, and the lower aspect of the latter, the animal intelligence, no longer receiving light from the higher mind, and no longer having a physical brain to work through, collapses.
Enq: In what way?
Theo: Well, it falls into the state of the frog when certain portions of its brain are taken out by the vivisector. It can think no more, even on the lowest animal plane. Henceforth it is no longer even the lower Manas, since this “lower” is nothing without the “higher”.
Enq: And is it this nonentity which we find materializing in Seance rooms with Mediums?
Theo: It is the nonentity. A true nonentity, however, only as to reasoning or cogitating powers, still an Entity, however astral and fluidic, as shown in certain cases when, having been magnetically and unconsciously drawn toward a medium, it is revived for a time and lives in him by proxy, so to speak.
This “spook”, or the Kama-rupa, may be compared with the jelly-fish, which has an ethereal gelatinous appearance so long as it is in its own element, or water (the medium’s specific AURA), but which, no sooner is it thrown out of it, than it dissolves in the hand or on the sand, especially in sunlight.
In the medium’s Aura, it lives a kind of vicarious life and reasons and speaks either through the medium’s brain or those of other persons present.
But this would lead us too far, and upon other people’s grounds, whereon I have no desire to trespass. Let us keep to the subject of reincarnation.”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 