Corticostriatal Flow of Action Selection Bias
Overview
Authors
Affiliations
The posterior parietal cortex (PPC) performs many functions, including decision making and movement control. It remains unknown which input and output pathways of PPC support different functions. We addressed this issue in mice, focusing on PPC neurons projecting to the dorsal striatum (PPC-STR) and the posterior secondary motor cortex (PPC-pM2). Projection-specific, retrograde labeling showed that PPC-STR and PPC-pM2 represent largely distinct subpopulations, with PPC-STR receiving stronger inputs from association areas and PPC-pM2 receiving stronger sensorimotor inputs. Two-photon calcium imaging during decision making revealed that the PPC-STR population encodes history-dependent choice bias more strongly than PPC-pM2 or general PPC populations. Furthermore, optogenetic inactivation of PPC-STR neurons or their terminals in STR decreased history-dependent bias, while inactivation of PPC-pM2 neurons altered movement kinematics. Therefore, PPC biases action selection through its STR projection while controlling movements through PPC-pM2 neurons. PPC may support multiple functions through parallel subpopulations, each with distinct input-output connectivity.
A multi-region recurrent circuit for evidence accumulation in rats.
Gupta D, Kopec C, Bondy A, Luo T, Elliott V, Brody C bioRxiv. 2024; .
PMID: 39026895 PMC: 11257434. DOI: 10.1101/2024.07.08.602544.
Performance errors during rodent learning reflect a dynamic choice strategy.
Zhu Z, Kuchibhotla K Curr Biol. 2024; 34(10):2107-2117.e5.
PMID: 38677279 PMC: 11488394. DOI: 10.1016/j.cub.2024.04.017.
Danskin B, Hattori R, Zhang Y, Babic Z, Aoi M, Komiyama T Sci Adv. 2023; 9(48):eadj4897.
PMID: 38019904 PMC: 10686558. DOI: 10.1126/sciadv.adj4897.
Parietal stimulation reverses age-related decline in exploration, learning, and decision-making.
Hwang E, Korde S, Han Y, Sambangi J, Lian B, Owusu-Ofori A bioRxiv. 2023; .
PMID: 37970542 PMC: 10642975. DOI: 10.1101/2023.10.21.563408.
Cortical glutamatergic projection neuron types contribute to distinct functional subnetworks.
Mohan H, An X, Xu X, Kondo H, Zhao S, Matho K Nat Neurosci. 2023; 26(3):481-494.
PMID: 36690901 PMC: 10571488. DOI: 10.1038/s41593-022-01244-w.