A Unified Framework for Dopamine Signals across Timescales.
A Unified Framework for Dopamine Signals across Timescales.
复制标题
跨时间尺度的多巴胺信号的统一框架。
DOI:
10.1016/j.cell.2020.11.013
复制
发表时间:
2020-12-10
期刊:
影响因子:
64.5
通讯作者:
Uchida N
中科院分区:
文献类型:
--
作者:
Kim HR;Malik AN;Mikhael JG;Bech P;Tsutsui-Kimura I;Sun F;Zhang Y;Li Y;Watabe-Uchida M;Gershman SJ;Uchida N
Rapid phasic activity of midbrain dopamine neurons is thought to signal reward prediction errors (RPEs), resembling temporal difference errors used in machine learning. However, recent studies describing slowly increasing dopamine signals have instead proposed that they represent state values and arise independently from somatic spiking activity. Here, we developed experimental paradigms using virtual reality that disambiguate RPEs from values. We examined dopamine circuit activity at various stages including somatic spiking, calcium signals at soma and axons, and striatal dopamine concentrations. Our results demonstrate that ramping dopamine signals are consistent with RPEs rather than value, and this ramping is observed at all stages examined. Ramping dopamine signals can be driven by a dynamic stimulus that indicates a gradual approach to a reward. We provide a unified computational understanding of rapid phasic and slowly ramping dopamine signals: dopamine neurons perform a derivative-like computation over values on a moment-by-moment basis. Examination of dopamine circuit activity and striatal dopamine concentrations in mice experiencing virtual reality teleportation and speed manipulation reveals that both rapid phasic and slowly ramping dopamine signals compute changes in value on a moment-by-moment basis.
登录
查看更多内容
影响因子:
16.2
作者:
Aronov, Dmitriy;Tank, David W.
通讯作者:
Tank, David W.
影响因子:
64.8
作者:
Cohen, Jeremiah Y.;Haesler, Sebastian;Vong, Linh;Lowell, Bradford B.;Uchida, Naoshige
通讯作者:
Uchida, Naoshige
影响因子:
2.9
作者:
Gershman, Samuel J.
通讯作者:
Gershman, Samuel J.
DOI:
10.1073/pnas.1517384113
发表时间:
2016-04-12
影响因子:
11.1
作者:
Brunton, Steven L.;Proctor, Joshua L.;Kutz, J. Nathan
通讯作者:
Kutz, J. Nathan
影响因子:
64.8
作者:
Engelhard, Ben;Finkelstein, Joel;Witten, Ilana B.
通讯作者:
Witten, Ilana B.