TY - JOUR AU - Benoit, Chloé Maëlle AU - Ganea, Dan Alin AU - Paricio-Montesinos, Ricardo AU - Esser, Julia AU - Thome, Christian AU - Janssen, Jan Maximilian AU - Sattin, Andrea AU - Innocenti, Sabrina Milena AU - Krabbe, Sabine AU - Lüthi, Andreas AU - Fellin, Tommaso AU - Engelhardt, Maren AU - Gründemann, Jan TI - Axon initial segment dynamics during associative fear learning JO - Nature neuroscience VL - Advance online publication SN - 1097-6256 CY - New York, NY PB - Nature America M1 - DZNE-2026-00034 SP - 1-24 PY - 2026 AB - The axon initial segment (AIS) is the site of action potential generation and exhibits structural and functional plasticity upon adaptation of neuronal excitability and disease. Performing in vivo longitudinal two-photon imaging of AIS in the medial prefrontal cortex of male mice, we reveal dynamic AIS remodeling during associative fear learning and extinction. These results demonstrate that AIS plasticity is not only crucial for homeostatic adaptation but also a hallmark of memory formation. LB - PUB:(DE-HGF)16 DO - DOI:10.1038/s41593-025-02152-5 UR - https://pub.dzne.de/record/283138 ER -