Sequential maturation of stimulus-specific adaptation in the mouse lemniscal auditory system

Abstract

<p>Stimulus-specific adaptation (SSA), the reduction of neural activity to a common stimulus that does not generalize to other, rare stimuli, is an essential property of our brain. Although well characterized in adults, it is still unknown how it develops during adolescence and what neuronal circuits are involved. Using in vivo electrophysiology and optogenetics in the lemniscal pathway of the mouse auditory system, we observed SSA to be stable from postnatal day 20 (P20) in the inferior colliculus, to develop until P30 in the auditory thalamus (MGV) and even later in the primary auditory cortex (A1). We found this maturation process to be experience-dependent in A1 but not in MGV, and to be related to alterations in deep but not input layers of A1. We also identified corticothalamic projections to be implicated in MGV SSA development. Together, our results reveal different circuits underlying the sequential SSA maturation and provide a unique perspective to understand predictive coding and surprise across sensory systems.</p><p>Funding provided by: Swiss National Science Foundation<br>Crossref Funder Registry ID: https://ror.org/00yjd3n13<br>Award Number: CRETP3-166735</p><p>Funding provided by: Swiss National Science Foundation<br>Crossref Funder Registry ID: https://ror.org/00yjd3n13<br>Award Number: 310030_19785</p><p><span>The data was collected using in vivo electrophysiological recordings in awake mice, using Neuronexus multishaft electrodes (A64 or A32). It was then processed for spike sorting using kilosort1, and curated manually using phy. Further details are described in the manuscript.<br></span></p&gt