These types of communication form a pyramid with the most basic being associated with the deepest part of the limbic system (or the emotional brain) and proceeding to the highest region with the most advanced type of communication associated with the regions of the prefrontal cortex. Each type of communication has its own brain region for which it is associated. In addition, each region has its own type of psychopathology originating from a failure of a specific kind of communication. Each type of pathology is an attachment failure, a type of communication failure, and a brain region development failure.
The type of psychopathology associated with each developmental failure will create a hierarchy, which is strikingly akin to the psychopathological severity tree formed through modern Psychiatric classification types.
The modes of communication hierarchy start with the most deeply unconscious and moves up to the most conscious type—each building on the on the one before it. Also, there is striking evidence that each brain region, with its characteristic communication type, evolved as the hierarchy of mammalian evolution proceeded. These forms of attachment evolved in a sequential manner with goal directed communication that only the human is capable of. In each form, the type of communication is most adaptive for the level of function of the animal and the form of attachment emanating from it the most useful to support the adaptation of that species.
I will briefly outline this hierarchy:
The most basic is the basic form of attachment which the most primitive mammals such as prairie vole or rat use. It emanates from the deepest level of the hippocampus and the form of communication which is involved is so called telepathic communication. This is the form of communication used by parents and their infants. It results in heart rate coordination, movement coordination, endocrine fit and brain to brain synchrony. Failures of this form of communication lead to the deepest forms of psychopathology such as schizophrenia and bipolar illness.
The 2nd level of attachment failure is at the level of the hippocampus/amygdala junction. It is associated with attachment failures in the process of separation. As animals leave the nest they start to experience fear. The amygdala is the brain region responsible for that emotion. When fear is experienced too early in life or is too excessive later in life, the amygdala overgrows the hippocampus and shuts off development. We have conditions known as PTSD conditions to represent those failures. The mode of communication is fear.