Dynamic model of the octopus arm. I. Biomechanics of the octopus reaching movement.

@article{Yekutieli2005DynamicMO,
  title={Dynamic model of the octopus arm. I. Biomechanics of the octopus reaching movement.},
  author={Yoram Yekutieli and Roni Sagiv-Zohar and Ranit Aharonov and Yaakov Engel and Binyamin Hochner and Tamar Flash},
  journal={Journal of neurophysiology},
  year={2005},
  volume={94 2},
  pages={
          1443-58
        }
}
The octopus arm requires special motor control schemes because it consists almost entirely of muscles and lacks a rigid skeletal support. Here we present a 2D dynamic model of the octopus arm to explore possible strategies of movement control in this muscular hydrostat. The arm is modeled as a multisegment structure, each segment containing longitudinal and transverse muscles and maintaining a constant volume, a prominent feature of muscular hydrostats. The input to the model is the degree of… 
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192 Citations
Highly Influential Citations
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192 Citations

Dynamic model of the octopus arm. II. Control of reaching movements.
TLDR
The modeling suggests that the octopus arm biomechanics may allow independent control of kinematics and resistance to perturbation during arm extension movements.
Kinematic decomposition and classification of octopus arm movements
TLDR
A novel representation of octopus arm movements is described in which a movement is characterized by a pair of surfaces that represent the curvature and torsion values of points along the arm as a function of time.
Octopus-inspired multi-arm robotic swimming
TLDR
This work investigates the propulsive capabilities of a multi-arm robotic system under various swimming gaits, namely patterns of arm coordination, which achieve the generation of forward, as well as backward, propulsion and turning, and a lumped-element model of the robotic swimmer was used.
Computing with a muscular-hydrostat system
TLDR
This paper demonstrates that the muscular-hydrostat system itself has the computational capacity to achieve a complex nonlinear computation and systematically analyzes its computational power in terms of memory capacity, and shows that the system has an intrinsic and characteristic short term memory profile.
Control-oriented Modeling of Bend Propagation in an Octopus Arm
TLDR
A control-oriented reduced order model based upon a novel parametrization of the curvature of the octopus arm is presented and compared using numerical simulations to lead to useful qualitative insights into bend propagation.
Soft robotic arm inspired by the octopus: I. From biological functions to artificial requirements
TLDR
The functional morphology of the internal tissues, including the sinusoidal arrangement of the nerve cord and the local insertion points of the longitudinal and transverse muscle fibres were investigated to create novel design principles and specifications that can be used in developing a new soft robotic arm.
Stereotypical reaching movements of the octopus involve both bend propagation and arm elongation
TLDR
The analysis of the elongation profiles of the reaching movements of Octopus vulgaris revealed that, in addition to bend propagation, arm extension movements involve elongation of the proximal part of the arm, i.e., the section from the base of the hand to the propagating bend.
Dynamic modeling and control of an octopus inspired multiple continuum arm robot
Analyzing octopus movements using three-dimensional reconstruction.
TLDR
This work describes a semiautomatic computerized system for 3D reconstruction of an octopus arm during motion and uses this system successfully to reconstruct different types ofOctopus arm movements, such as reaching and bend initiation movements.
Simulation of Octopus Arm Based on Coupled CPGs
TLDR
Three coupled central pattern generators (CPGs) are built and a 2-dimensional dynamic model of the octopus arm is presented to explore possible strategies of theOctopus movement control and the results are beneficial for researchers to understand theoctopus movement further.
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