ABSTRACT
To produce consistent sensory perception, neurons must maintain stable representations of sensory input. However, neurons in many regions exhibit progressive drift across days. Longitudinal studies have found stable responses to artificial stimuli across sessions in primary sensory areas, but it is unclear whether this stability extends to naturalistic stimuli. We performed chronic 2-photon imaging of mouse V1 populations to directly compare the representational stability of artificial versus naturalistic visual stimuli over weeks. Responses to gratings were highly stable across sessions. However, neural responses to naturalistic movies exhibited progressive representational drift across sessions. Differential drift was present across cortical layers, in inhibitory interneurons, and could not be explained by differential response strength or higher order stimulus statistics. However, representational drift was accompanied by similar differential changes in local population correlation structure. These results suggest representational stability in V1 is stimulus-dependent and related to differences in preexisting circuit architecture of co-tuned neurons.
Competing Interest Statement
The authors have declared no competing interest.
Footnotes
Text and figures have been revised to address reviewer comments. Major changes: 1) Added new experiments to address differences in the temporal structure of the stimuli (Figure S7). 2) Added new experiments to address changes due to repeated presentation of stimuli (Figure S8). 3) Added additional analysis of relation of representational drift to eye movements and pupil size (Figures S10-11)
