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1 Janelia Publications

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    Schulze Lab
    03/04/26 | Brain-wide hierarchical and sexually dimorphic tuning for social vocalizations
    Henninger J, Hoffmann M, Kadobianskyi M, Veith J, Berlage C, Groneberg A, Markov D, Schulze L, Svanidze A, Maler L, Judkewitz B
    bioRxiv. 2026 Mar 04:. doi: 10.64898/2026.03.04.709502

    Acoustic communication is widespread among vertebrates and central to social behavior. Yet how brain-wide circuits identify conspecific signals and distinguish acoustic elements with different, often sex-specific social valence remains poorly understood. Here we present the first whole-brain analysis of neuronal responses to conspecific vocalisations in vertebrates, using the transparent fish Danionella cerebrum. Combining volumetric calcium imaging with playbacks probing the stimulus space of the natural sound repertoire, we uncover an unexpectedly early and specialized processing hierarchy: hindbrain nuclei already segregate vocalization-like pulse trains from tones, midbrain regions sharpen these representations and extract temporal features that define vocalization type, and the central posterior thalamic nucleus responds selectively to conspecific vocalization rates and thus acts as a gate for social sounds. Male and female brains share this early feature code but diverge in diencephalic and telencephalic regions, where identical acoustic features evoke sex-specific population activity patterns that parallel dimorphic behavior. Together, our results provide the first cellular-resolution, brain-wide account of social sound processing in a vertebrate, from early categorical segregation to thalamic gating and sex-specific population responses in social circuits.

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