Different Synchrony in Rhythmic Movement Caused by Morphological Difference between Five- and Six-armed Brittle Stars

  title={Different Synchrony in Rhythmic Movement Caused by Morphological Difference between Five- and Six-armed Brittle Stars},
  author={Daiki Wakita and Yumino Hayase and Hitoshi Aonuma},
  journal={Scientific Reports},
Physiological experiments and mathematical models have supported that neuronal activity is crucial for coordinating rhythmic movements in animals. On the other hand, robotics studies have suggested the importance of physical properties made by body structure, i.e. morphology. However, it remains unclear how morphology affects movement coordination in animals, independent of neuronal activity. To begin to understand this issue, our study reports a rhythmic movement in the green brittle star… 

Report on the First Symposium on Invertebrate Neuroscience held on 13–17th August 2019 at the Balaton Limnological Institute, MTA Centre for Ecological Research, Tihany, Hungary

This meeting report provides an overview of the oral and poster presentations at the first international symposium for invertebrate neuroscience in addressing fundamental and fascinating challenges in understanding the neural substrates of animal behaviour.



A Fluid-Filled Soft Robot That Exhibits Spontaneous Switching Among Versatile Spatiotemporal Oscillatory Patterns Inspired by the True Slime Mold

Inspired by the plasmodium, a mathematical model is built that demonstrates that, in contrast to coupled nonlinear oscillators with a well-designed complex diffusion network, physically interacting mechanosensory oscillators are capable of generating versatile oscillatory patterns without changing any parameters.

Dual-mode operation of neuronal networks involved in left–right alternation

It is shown that ablation of a group of transcriptionally defined commissural neurons—the V0 population—leads to a quadrupedal hopping at all frequencies of locomotion, with two subgroups of V0 neurons required for the existence of left–right alternating modes at different speeds of locomotions.

A brittle star-like robot capable of immediately adapting to unexpected physical damage

It is found that physical interaction between arms plays an essential role for the resilient inter-arm coordination of brittle stars and this finding will help develop resilient robots that can work in inhospitable environments.

Simple robot suggests physical interlimb communication is essential for quadruped walking

This work has developed a simple-structured quadruped robot with the help of which it is proposed an unconventional CPG model that consists of four decoupled oscillators with only local force feedback in each leg, and it can mimic the walking patterns of actual quadrupeds.

Sustained oscillations generated by mutually inhibiting neurons with adaptation

This paper mathematically discusses sustained oscillations generated by mutual inhibition of the neurons which are represented by a continuous-variable model with a kind of fatigue or adaptation effect and suggests that the adaptation of the neuron plays a very important role for the appearance of the oscillations.

Motor systems, with specific reference to the control of locomotion.

  • P. Stein
  • Biology
    Annual review of neuroscience
  • 1978
This review will discuss how principles from theoretical principles arising from studies of the properties of interneurons within the CNS apply to locomotion and will suggest that they may also serve as useful working hypotheses in the study of other motor systems.

Principles of rhythmic motor pattern generation.

Cellular, circuit, and computational analyses of the mechanisms underlying the generation of rhythmic movements in both invertebrate and vertebrate nervous systems are discussed.

A Quadruped Robot Exhibiting Spontaneous Gait Transitions from Walking to Trotting to Galloping

This paper provides evidence for interlimb coordination during gait transitions using a quadruped robot for which coordination between the legs can be self-organized through a simple “central pattern generator” (CPG) model.

Neural basis of rhythmic behavior in animals.

Evidence of this permits resolution of the long-standing controversy over the neural basis of rhythmic behavior and aids in the identification of this mechanism as a general principle of neural organization applicable to all animals with central nervous systems.