論文 - 詳細
| RRC ID | 33630 |
|---|---|
| 著者 | Ampatzis K, Song J, Ausborn J, El Manira A. |
| タイトル | Separate microcircuit modules of distinct v2a interneurons and motoneurons control the speed of locomotion. |
| ジャーナル | Neuron |
| Abstract |
Spinal circuits generate locomotion with variable speed as circumstances demand. These circuits have been assumed to convey equal and uniform excitation to all motoneurons whose input resistance dictates their activation sequence. However, the precise connectivity pattern between excitatory premotor circuits and the different motoneuron types has remained unclear. Here, we generate a connectivity map in adult zebrafish between the V2a excitatory interneurons and slow, intermediate, and fast motoneurons. We show that the locomotor network does not consist of a uniform circuit as previously assumed. Instead, it can be deconstructed into three separate microcircuit modules with distinct V2a interneuron subclasses driving slow, intermediate, or fast motoneurons. This modular design enables the increase of locomotor speed by sequentially adding microcircuit layers from slow to intermediate and fast. Thus, this principle of organization of vertebrate spinal circuits represents an intrinsic mechanism to increase the locomotor speed by incrementally engaging different motor units. |
| 巻・号 | 83(4) |
| ページ | 934-43 |
| 公開日 | 2014-8-20 |
| DOI | 10.1016/j.neuron.2014.07.018 |
| PII | S0896-6273(14)00629-1 |
| PMID | 25123308 |
| MeSH | Acceleration Action Potentials / physiology Animals Interneurons / physiology* Locomotion / physiology* Motor Neurons / physiology* Nerve Net / cytology* Nerve Net / physiology Spinal Cord / cytology* Spinal Cord / physiology Zebrafish |
| IF | 14.415 |
| 引用数 | 69 |
| WOS 分野 | NEUROSCIENCES |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 15 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| ゼブラフィッシュ | Tg(chx10:GFP) Tg(vsx2:EGFP) |