V2a interneuron diversity tailors spinal circuit organization to control the vigor of locomotor movements.
V2a interneuron diversity tailors spinal circuit organization to control the vigor of locomotor movements.
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V2a 中间神经元多样性定制脊髓回路组织来控制运动的活力
DOI:
10.1038/s41467-018-05827-9
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发表时间:
2018-08-22
影响因子:
16.6
通讯作者:
El Manira A
中科院分区:
文献类型:
--
作者:
Song J;Dahlberg E;El Manira A
Locomotion is a complex motor task generated by spinal circuits driving motoneurons in a precise sequence to control the timing and vigor of movements, but the underlying circuit logic remains to be understood. Here we reveal, in adult zebrafish, how the diversity and selective distribution of two V2a interneuron types within the locomotor network transform commands into an appropriate, task-dependent circuit organization. Bursting-type V2a interneurons with unidirectional axons predominantly target distal dendrites of slow motoneurons to provide potent, non-linear excitation involving NMDA-dependent potentiation. A second type, non-bursting V2a interneurons with bidirectional axons, predominantly target somata of fast motoneurons, providing weaker, non-potentiating excitation. Together, this ensures the rapid, first-order recruitment of the slow circuit, while reserving the fast circuit for highly salient stimuli involving synchronous inputs. Our results thus identify how interneuron diversity is captured and transformed into a parsimonious task-specific circuit design controlling the vigor of locomotion. Locomotor circuits in the spinal cord produce precise movements with variations in timing and vigor. Here, the authors report that such motor flexibility is generated through the specificity of connections between subtypes of V2a interneurons and motoneuron populations and their distinct plasticity mechanisms.
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影响因子:
9.8
作者:
Bhumbra GS;Beato M
通讯作者:
Beato M
DOI:
10.1073/pnas.1216256110
发表时间:
2012-12-26
影响因子:
11.1
作者:
Ausborn, Jessica;Mahmood, Riyadh;El Manira, Abdeljabbar
通讯作者:
El Manira, Abdeljabbar
影响因子:
11.1
作者:
Arber S
通讯作者:
Arber S
影响因子:
64.5
作者:
Bikoff JB;Gabitto MI;Rivard AF;Drobac E;Machado TA;Miri A;Brenner-Morton S;Famojure E;Diaz C;Alvarez FJ;Mentis GZ;Jessell TM
通讯作者:
Jessell TM
影响因子:
5.3
作者:
Dougherty, Kimberly J.;Kiehn, Ole
通讯作者:
Kiehn, Ole