Just now I found an online course in transpersonal counselling, with the
7th lesson dedicated to Stan Grof's work.
There is an illustrated explanation there of terms like the four Basic Perinatal Matrices and the COEX systems.
For example:
Grof divides the birth process up in four stages or
PERINATAL MATRICES
BPM I: Unity with the mother
BPM II: Opposition to the mother
BPM III: Cooperation with the mother
BPM IV: Separation from the mother
A general idea of the impact from the different stages could be:
BPM I: Positive experiences: Trust, expansion, union with the cosmos.
Negative experiences: Paranoia, hypochondria, confusing daydreams with reality.
BPM II: Positive experiences?
Negative experiences: Depression, "cardboard world", inferiority and guilt, alcohol and drug dependency.
BPM III: Positive experiences: "It pays to fight for something"
Negative experiences: Sadomasochism, scatological elements, obsessive-compulsive neurosis, stammering, migraine headache.
BPM IV: Positive experiences: The world is a beautiful and safe place
Negative experiences: Total annihilation, ego death, manic experiences.
BPM I
The biological basis of this matrix is the experience of the original symbiotic unity of the foetus with the maternal organism…
During episodes of undisturbed life in the womb, the conditions of the child can be close to ideal.
However, a variety of factors of physical, chemical, biological and psychological nature can seriously interfere with this state.
The undisturbed intra-uterine state can be accompanied by other experiences that share with it a lack of boundaries and obstructions, such as consciousness of the ocean, an aquatic life form (Whale, fish, jellyfish, anemone, or kelp), or interstellar space. Also Nature at its best.
Archetypical images from the collective unconscious could be the heavens or paradises of different cultures, cosmic union or mystical union.
The disturbances of inter-uterine life are associated with images and experiences of underwater dangers, polluted streams, contaminated or inhospitable nature, and insidious demons.
Examples of disturbances can be strong conflict between the father and expectant mother, considerations of abortion, strong intoxication.
The mystical dissolution of boundaries is replaced by a psychotic distortion with paranoid undertones.
BPM II
This matrix has its biological basis in the very onset of biological delivery and its first clinical stage.
Here the original equilibrium of the intra-uterine existence is disturbed, first by alarming signals and then by muscular contractions. When this stage fully develops, the foetus is periodically constricted by uterine spasms; the cervix is closed and the way out is not yet available
Imagery following BPM II is the experience of cosmic engulfment, overwhelming feelings of increasing anxiety and awareness of an imminent vital threat. The source of this danger cannot be clearly identified, and the subject has a tendency to interpret the world in paranoid terms. Very characteristic for this stage is the experience of a three dimensional spiral, funnel or whirlpool, sucking the subject relentlessly towards its centre.
An equivalent of this annihilating maelstrom is the experience of being swallowed by a terrifying monster, such as a giant dragon, python, crocodile or whale. Equally frequent are experiences of attack by a monstrous octopus or spider.
Archetypical imagery is the beginning of the hero’s journey, the fall of the angels, paradise lost. Images of being stuck, in prison or concentration camp or even hell are also common.
Common feelings are agonising metaphysical loneliness, helplessness, inferiority, despair and guilt.
etc.