This is suppression of long-term memory in addition to that of traumatic or 'unexperienced' experience. The latter problem suppresses to a large extent the first, emotional phase of development - memories before the age of three. The suppression we are considering here is of the second, descriptive phase of development. Inner and outer speech develop in ways that are complementary but different. Outer speech becomes richer, more detailed and follows more closely to the ideal model of the language.
Inner speech becomes less and less complete.
With maturity comes a point where inner and outer speech have become separate languages with different syntax. Transfer from inner to outer speech poses many of the same problems as translation between two languages. These people often experience spontaneous flashbacks to early childhood that are so vivid as to constitute an active reliving. As such, by providing a route back to the feeling Self, these are peak experiences leading to a greater integration of the mind and body. One route to healing the split between mind and body is to recall with sufficient detail, a period of childhood in which you were a body-mind.