PUBLICATION
Function of identified motoneurones and co-ordination of primary and secondary motor systems during zebra fish swimming
- Authors
- Liu, D.W. and Westerfield, M.
- ID
- ZDB-PUB-961014-712
- Date
- 1988
- Source
- The Journal of physiology 403: 73-89 (Journal)
- Registered Authors
- Liu, Dennis, Westerfield, Monte
- Keywords
- none
- MeSH Terms
-
- Action Potentials
- Time Factors
- Motor Neurons/physiology*
- Cyprinidae/physiology*
- Zebrafish/physiology*
- Swimming*
- Muscles/innervation
- Animals
- PubMed
- 3253426 Full text @ J. Physiol.
Citation
Liu, D.W. and Westerfield, M. (1988) Function of identified motoneurones and co-ordination of primary and secondary motor systems during zebra fish swimming. The Journal of physiology. 403:73-89.
Abstract
1. The activity of the two classes of motoneurones, primary and secondary, which innervate myotomal muscle fibres in the zebra fish, was monitored with electromyographic and intracellular techniques. 2. Simultaneous EMG and intracellular recordings from muscle fibres showed that the activity of the two motor systems and of individual primary motoneurones can be distinguished by recording EMG spikes during swimming. 3. Measurements of EMG spikes demonstrated that primary and secondary motoneurones are co-ordinately activated over a wide range of conditions during normal swimming. 4. During swimming the primary motoneurones within a given segment are usually co- activated although they sometimes fire independently. 5. When different primary motoneurones within a given segment are co- activated, they fire nearly synchronously. 6. We conclude that the primary motoneurones are used principally, although not exclusively, during fast swimming, struggling and the startle response, whereas secondary motoneurones function primarily during slower swimming.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping