Sensory-motor control mechanism for reaching movements of a redundant musculo-skeletal arm

2005 ◽  
Vol 22 (11) ◽  
pp. 639-651 ◽  
Author(s):  
Kenji Tahara ◽  
Zhi-Wei Luo ◽  
Suguru Arimoto ◽  
Hitoshi Kino
Keyword(s):  
Motor Control ◽  
Control Mechanism ◽  
Reaching Movements ◽  
Sensory Motor

scholarly journals On Control of Reaching Movements for Musculo-Skeletal Redundant Arm Model

2009 ◽  
Vol 6 (1) ◽  
pp. 11-26 ◽  
Author(s):  
Kenji Tahara ◽  
Suguru Arimoto ◽  
Masahiro Sekimoto ◽  
Zhi-Wei Luo
Keyword(s):  
Motor Control ◽  
Numerical Simulations ◽  
Inverse Dynamics ◽  
Control Mechanism ◽  
Reaching Movements ◽  
Task Space ◽  
Simple Task ◽  
Muscle Dynamics ◽  
Non Linear ◽  
Internal Forces

This paper focuses on a dynamic sensory-motor control mechanism of reaching movements for a musculo-skeletal redundant arm model. The formulation of a musculo-skeletal redundant arm system, which takes into account non-linear muscle properties obtained by some physiological understandings, is introduced and numerical simulations are perfomed. The non-linear properties of muscle dynamics make it possible to modulate the viscosity of the joints, and the end point of the arm converges to the desired point with a simple task-space feedback when adequate internal forces are chosen, regardless of the redundancy of the joint. Numerical simulations were performed and the effectiveness of our control scheme is discussed through these results. The results suggest that the reaching movements can be achieved using only a simple task-space feedback scheme together with the internal force effect that comes from non-linear properties of skeletal muscles without any complex mathematical computation such as an inverse dynamics or optimal trajectory derivation. In addition, the dynamic damping ellipsoid for evaluating how the internal forces can be determined is introduced. The task-space feedback is extended to the ‘virtual spring-damper hypothesis’ based on the research by Arimoto et al. (2006) to reduce the muscle output forces and heterogeneity of convergence depending on the initial state and desired position. The research suggests a new direction for studies of brain-motor control mechanism of human movements.

scholarly journals Tapping Behavior and Inter-Stimulus Interval in Isochronous Sound Sequence

2020 ◽  
Vol 9 (4) ◽  
pp. 1411-1415
Keyword(s):  
Motor Control ◽  
Control Mechanism ◽  
Top Down ◽  
Stimulus Interval ◽  
Feed Forward ◽  
Inter Stimulus Interval ◽  
Sensory Motor ◽  
Sound Sequence ◽  
Healthy Participants

The main objective of this study is to examine anticipatory tapping and reactive tapping under two different inter-stimulus interval (ISI). Healthy participants (N = 30) aged from 18 to 35 years voluntarily participated in the study. The results show that the ISI plays an important role in sensory motor synchronization (SMS). The analysis of asynchrony revealed that two different type of tapping occurred under two different ISI. Under short ISI (1000 ms), participants executed their responses before the tone (i.e., anticipatory tapping driven by feed-forward motor control). Under long ISI (2000 ms), participants executed their responses after the tone (i.e., reactive tapping driven by feed-back motor control mechanism). In summary, participants showed anticipatory tapping in the absence of top-down attention and reactive tapping with the involvement of top-down attention.

EFFECTS OF A ROBOTIC THERAPY GAME ON THE SENSORY-MOTOR CONTROL OF HEALTHY ADULTS' ANKLE

2018 ◽  
Author(s):  
Marcela Silva Couto ◽  
Thiago Russo ◽  
Gabriela Lopes dos Santos ◽  
Adriano Siqueira
Keyword(s):  
Motor Control ◽  
Healthy Adults ◽  
Robotic Therapy ◽  
Sensory Motor
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