Stratification linguistics

Stratification Linguistics is a view of linguistics advocated by Sidney Lamb, that language usage and production is stratificational in nature.

Specifically, that there are separate 'strata' or levels in the brain used for language. Each level provides actualization or 'realization' for the next higher level, and the elements on its level are similar to each other. Several strata are involved in the production of a sound from an initial idea.

Some strata are those of

Phoneme as the unit on the Phonemic[?] strata.
Lexeme as a unit on the Lexical[?] strata.
Morpheme as the unit on the Morphemic[?] strata
Sememe[?] as the unit on the Semantic strata.