the theory that stimuli or irritants leave definite traces (engrams) on the protoplasm of the animal, and when these stimuli are regularly repeated they induce a habit that persists after the stimuli cease.
mnemic theoryA scientifically naïve, long-abandoned proposal that certain types of memory are inscribed in the protoplasm of plant and animal cells in the form of a nebulously defined unit or engram, which could then be transmitted to the parent organism's progeny.
Semon,Richard W., German biologist, 1859-1908.
Semon-Hering theory - the theory that stimuli leave definite traces on the protoplasm of the animal or plant that persist after the stimuli cease. Synonym(s): mnemic hypothesis