Topic: stimulus representation vector

Representational drift has been observed in different parts of the nervous system. Nevertheless a complete mechanistic understanding about it is missing. In a recent experimental study in the olfactory system, recordings from the piriform cortex demonstrate drift in the representation of a single olfactory stimulus, despite apparently stable odor identification. Such drift is characterized by a decay in the self-similarity of the stimulus representation vector as a function of the time between the recordings. Additionally, the rate of the decay was shown to be smaller for more frequent stimuli