A Projection Specific Logic to Sampling Visual Inputs in Mouse Superior Colliculus
Affiliations
Using sensory information to trigger different behaviors relies on circuits that pass through brain regions. The rules by which parallel inputs are routed to downstream targets are poorly understood. The superior colliculus mediates a set of innate behaviors, receiving input from >30 retinal ganglion cell types and projecting to behaviorally important targets including the pulvinar and parabigeminal nucleus. Combining transsynaptic circuit tracing with in vivo and ex vivo electrophysiological recordings, we observed a projection-specific logic where each collicular output pathway sampled a distinct set of retinal inputs. Neurons projecting to the pulvinar or the parabigeminal nucleus showed strongly biased sampling from four cell types each, while six others innervated both pathways. The visual response properties of retinal ganglion cells correlated well with those of their disynaptic targets. These findings open the possibility that projection-specific sampling of retinal inputs forms a basis for the selective triggering of behaviors by the superior colliculus.
Santos J, Li C, Andries L, Masin L, Nuttin B, Reinhard K bioRxiv. 2025; .
PMID: 40060504 PMC: 11888416. DOI: 10.1101/2025.02.28.640775.
Genetically defined neuron types underlying visuomotor transformation in the superior colliculus.
Cang J, Chen C, Li C, Liu Y Nat Rev Neurosci. 2024; 25(11):726-739.
PMID: 39333418 DOI: 10.1038/s41583-024-00856-4.
Inner Structure of the Lateral Geniculate Complex of Adult and Newborn .
Merkulyeva N, Mikhalkin A, Veshchitskii A Int J Mol Sci. 2024; 25(14).
PMID: 39063096 PMC: 11277159. DOI: 10.3390/ijms25147855.
The Molecular Logic of Synaptic Specificity in the Retinocollicular Pathway.
Liu Y J Neurosci. 2024; 44(25).
PMID: 38897733 PMC: 11209652. DOI: 10.1523/JNEUROSCI.0383-24.2024.
Predation without direction selectivity.
Krizan J, Song X, Fitzpatrick M, Shen N, Soto F, Kerschensteiner D Proc Natl Acad Sci U S A. 2024; 121(12):e2317218121.
PMID: 38483997 PMC: 10962952. DOI: 10.1073/pnas.2317218121.