Using noisy work loops to identify the phase-dependent stiffness and damping of muscle in lampreys

Date

2018-03-01

Author

Tytell, E. D.
Carr, J. A.
Danos, N.
Cowan, N. J.
Ankaralı, Mustafa Mert

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

94
views

0
downloads

Unlike most manmade machines, animals move through their world using flexible appendages, which bend due to internal muscle and body forces, but also due to forces from the environment. Fishes, in particular, must cope with fluid dynamic forces that not only resist their overall swimming movements but also may have unsteady flow patterns, vortices, and turbulence. We have been characterizing how the muscle tissue itself, due to its own intrinsic properties, is able to respond to perturbations. We have developed a modified work loop protocol to determine how muscle in the silver lamprey,Ichthyomyzon unicuspis, responds to perturbations during the swimming cycle. A small section of axial musculature, ~2 myomeres in length, was dissected and used to perform standard in vitro work loops. A 1Hz sinusoidal length change of 6% of the optimal length was imposed on the muscle and both active and passive force were measured. Then, small sinusoidal perturbations at different frequencies are added to the baseline length change. We find that the effective stiffness and damping of muscle varies during the swimming cycle, and that the timing of activation can alter both the magnitude and timing of peak stiffness and damping. The results are analyzed using a new system identification technique based on harmonic transfer functions, which allow us to use these data to predict the muscle function under other conditions. In particular, we are investigating how muscle behaves as part of a feedback loop, when coupled to other muscles and to the body and fluid. Together, these results are starting to produce an integrative understanding of how fish swim effectively in their complex, turbulent environment.

URI

https://hdl.handle.net/11511/54045

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Body stiffness and damping depend sensitively on the timing of muscle activation in lampreys Tytell, Eric D.; Carr, Jennifer A.; Danos, Nicole; Wagenbach, Christopher; Sullivan, Caitlin M.; Kıemel, Tim; Cowan, Noah J.; Ankaralı, Mustafa Mert (Oxford University Press (OUP), 2018-11-01) Unlike most manmade machines, animals move through their world using flexible bodies and appendages, which bend due to internal muscle and body forces, and also due to forces from the environment. Fishes in particular must cope with fluid dynamic forces that not only resist their overall swimming movements but also may have unsteady flow patterns, vortices, and turbulence, many of which occur more rapidly than what the nervous system can process. Has natural selection led to mechanical properties of fish bo...
A viscoelastic sphere model for the representation of plantar soft tissue during simulations Guler, HC; Berme, N; Simon, SR (1998-09-01) Simulations of human body during locomotion require a realistic representation of the foot which is the major interacting part of the body with the environment. Most simulation models consider the foot to be a rigid link, and impose unrealistic kinematic conditions. This study utilizes a viscoelastic sphere model with realistic properties, which can be used to represent the plantar surface of the foot during locomotion. The mechanical properties of the sphere are identified using experimental data on heel p...
Extending The Lossy Spring-Loaded Inverted Pendulum Model with a Slider-Crank Mechanism Orhon, H. Eftun; Odabas, Caner; Uyanik, Ismail; Morgul, Omer; Saranlı, Uluç (2015-07-31) Spring Loaded Inverted Pendulum (SLIP) model has a long history in describing running behavior in animals and humans as well as has been used as a design basis for robots capable of dynamic locomotion. Anchoring the SLIP for lossy physical systems resulted in newer models which are extended versions of original SLIP with viscous damping in the leg. However, such lossy models require an additional mechanism for pumping energy to the system to control the locomotion and to reach a limit-cycle. Some studies so...
Quadrupedal Bounding with an Actuated Spinal Joint Culha, Utku; Saranlı, Uluç (2011-05-13) Most legged vertebrates use flexible spines and supporting muscles to provide auxiliary power and dexterity for dynamic behaviors, resulting in higher speeds and additional maneuverability during locomotion. However, most existing legged robots capable of dynamic locomotion incorporate only a single rigid trunk with actuation limited to legs and associated joints. In this paper, we investigate how quadrupedal bounding can be achieved in the presence of an actuated spinal joint and characterize associated pe...
Control of quadruped walking behavior through an embedding of spring loaded inverted pendulum template Yılmaz, Mert Kaan; Saranlı, Uluç; Department of Computer Engineering (2022-8) Legged robots require complex dynamical behaviours in order to achieve stable, sustainable and efficient locomotion. Due to their mobile nature, they can neither afford to provide extensive computational power, nor use anything but the most energy efficient structural designs and algorithms to achieve stability and speed. Consequently, simple and efficient ways to solve the complex set of problems is one of the key points of focus in legged robot locomotion research. This thesis offers a novel method that u...

Citation Formats

E. D. Tytell, J. A. Carr, N. Danos, N. J. Cowan, and M. M. Ankaralı, “Using noisy work loops to identify the phase-dependent stiffness and damping of muscle in lampreys,” 2018, vol. 58, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54045.