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Updated: Aug 29, 2025
04:59
Spinal Cord Electrophysiology
Published on: January 18, 2010
21.6K
Motoneuronal Regulation of Central Pattern Generator and Network Function.
Mélanie Falgairolle1, Michael J O'Donovan2
1NCCIH, NINDS, NIH, Bethesda, MD, USA.
Advances in Neurobiology
|September 6, 2022
Summary
Vertebrate motoneurons initiate rhythmic activity in developing spinal cords and influence central pattern generators. These findings suggest motoneurons are integral components of neural circuits controlling movement.
Area of Science:
- Neuroscience
- Developmental Biology
- Motor Control
Background:
- Spinal cord circuits generate rhythmic motor patterns.
- The role of motoneurons in initiating and modulating these patterns is increasingly recognized.
Purpose of the Study:
- To review recent findings on motoneuron-driven rhythmic activity in the spinal cord.
- To explore the involvement of motoneurons in central pattern generators (CPGs) across development.
Main Methods:
- Antidromic activation of motoneurons in embryonic chick and fetal mouse spinal cords.
- Optogenetic manipulation of motoneuron firing in neonatal mice.
- Observation of motoneuron regulation of swimming and vocalization in adult vertebrates.
Main Results:
- Antidromic motoneuron activation triggers rhythmic activity in developing spinal cords.
- Motoneuron firing modulates the frequency of fictive locomotion.
- Motoneurons regulate motor behaviors like swimming and vocalization in adult animals.
Conclusions:
- Vertebrate motoneurons play a crucial role in initiating and modulating spinal cord rhythmic activity.
- Motoneurons are functionally integrated into central pattern generators throughout development and in adult animals.
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