Distinct processing of visual motion by transcriptomic cell types in the superior colliculus

Cbln4+, Vip+, and Grp+ neuron types in the mouse superior colliculus encode distinct ranges of visual motion features, including direction, speed, size, and spatiotemporal properties.

• Why it matters: It remains unclear how the brain’s visual motion computations are organized across neuron types, and whether transcriptomic identity maps onto functional selectivity.
• What they did: Using transgenic mouse lines targeting three transcriptomic neuron types in superficial SC, the study measured encoding of motion features and compared stimulus-response manifolds alongside morphology and connectivity.
• The result: Under ecologically relevant visual flows, the three types occupy distinct regions of the encoding manifold and differ in retinal/intracollicular inputs and projection patterns, supporting transcriptomic cell types as basic computational units.

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