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Autonomic control of the swimbladder
1Department of Anatomy & Neurobiology, Dalhousie University, Halifax, Nova Scotia, Canada.
Autonomic Neuroscience : Basic & Clinical
|September 7, 2010
Summary
Teleost fish use their swimbladder to control buoyancy. This review explores the complex autonomic nervous system control of swimbladder gas volume, proposing the zebrafish as a model organism.
Area of Science:
- Ichthyology
- Neurobiology
- Physiology
Background:
- The swimbladder is crucial for teleost fish buoyancy control.
- Autonomic nervous system regulates swimbladder gas volume for neutral buoyancy.
- Swimbladder morphology and function vary across teleost species.
Purpose of the Study:
- To review the autonomic nervous system's control of swimbladder effectors.
- To elucidate the neurotransmitters and receptors involved in swimbladder gas regulation.
- To propose the zebrafish as a model for studying swimbladder autonomic control.
Main Methods:
- Review of existing literature on swimbladder physiology and neurobiology.
- Analysis of autonomic nervous system pathways and neurotransmitter roles.
- Identification of knowledge gaps in swimbladder innervation and receptor function.
Main Results:
- Swimbladder gas volume is controlled by acid-secreting cells, vasculature, and musculature.
- Autonomic control involves classical neurotransmitters (noradrenaline, acetylcholine) and non-classical ones (peptides, purines, nitric oxide).
- Detailed patterns of innervation and receptor subtypes are not fully understood.
Conclusions:
- The autonomic control of swimbladder function is complex and not fully elucidated.
- Further research is needed to understand neurotransmitter actions and receptor subtypes.
- The zebrafish offers a promising model for investigating swimbladder autonomic control mechanisms.
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