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Neuronal sensorimotor integration guiding salt concentration navigation in Caenorhabditis elegans
Ayaka Matsumoto1, Yu Toyoshima1, Chenqi Zhang2
1Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
Summary
The nematode Caenorhabditis elegans navigates by adjusting neck bending in response to salt concentration changes. A specific neck motor neuron
Area of Science:
- Neuroscience
- Animal Behavior
- Biophysics
Background:
- Animals integrate sensory input with motor status for navigation.
- The nematode Caenorhabditis elegans is a model organism for studying neural mechanisms of navigation.
Purpose of the Study:
- To explore the neural mechanisms underlying sensory-motor integration for navigation in C. elegans.
- To investigate how C. elegans processes temporal NaCl stimuli to guide movement.
Main Methods:
- Developed a microfluidic device for free-head movement in C. elegans under temporal NaCl stimuli.
- Analyzed behavioral responses and neural activity of neck motor neurons.
- Utilized optogenetic perturbation experiments and computational simulations.
Main Results:
- C. elegans regulates neck bending direction in response to temporal NaCl changes, aligning with navigation towards preferred salt concentrations.
- Neck motor neuron activity correlates with neck bending and is activated by decreasing NaCl concentration in a phase-dependent manner.
- NaCl decrease during ventral bending activates a neck motor neuron, counteracting ipsilateral bending.
Conclusions:
- The phase-dependent activation of neck motor neurons by NaCl decrease facilitates navigation towards preferred salt concentrations in C. elegans.
- This study reveals a neural circuit mechanism for sensory-guided navigation.
