Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Martin Lakie"'
Autor:
Kenneth S. Campbell, Martin Lakie
Publikováno v:
J Appl Physiol (1985)
Relaxed skeletal muscle has an inbuilt resistance to movement. In particular, the resistance manifests itself as a substantial stiffness for small movements. The stiffness is impermanent, because it forms only when the muscle is stationary for some t
Publikováno v:
PLoS ONE, Vol 16, Iss 1, p e0244993 (2021)
PLoS ONE
PLoS ONE
When standing, intrinsic ankle stiffness is smaller when measured using large perturbations, when sway size is large, and when background torque is low. However, there is a large variation in individual intrinsic ankle stiffness. Here we determine if
Publikováno v:
Biological Cybernetics. 104:31-51
The paradigm of continuous control using internal models has advanced understanding of human motor control. However, this paradigm ignores some aspects of human control, including intermittent feedback, serial ballistic control, triggered responses a
Publikováno v:
Journal of Neurophysiology. 102:460-474
Proprioception comes from muscles and tendons. Tendon compliance, muscle stiffness, and fluctuating activity complicate transduction of joint rotation to a proprioceptive signal. These problems are acute in postural regulation because of tiny joint r
Publikováno v:
The Journal of Physiology. 587:1343-1365
Human balance is commonly described using linear-time-invariant (LTI) models. The feedback time delay determines the position of balance in the motor-control hierarchy. The extent of LTI control illuminates the automaticity of the control process. Us
Publikováno v:
The Journal of Physiology. 577:417-432
While standing naturally and when manually or pedally balancing an equivalent inverted pendulum, the load sways slowly (characteristic unidirectional duration ∼1 s) and the controller, calf muscles or hand, makes more frequent adjustments (characte
Publikováno v:
The Journal of Physiology. 551:357-370
These experiments were prompted by the recent discovery that the intrinsic stiffness of the ankle is inadequate to stabilise passively the body in standing. Our hope was that showing how a large inverted pendulum was manually balanced with low intrin
Publikováno v:
The Journal of Physiology. 532:879-891
Using the ankle musculature, subjects balanced a large inverted pendulum. The equilibrium of the pendulum is unstable and quasi-regular sway was observed like that in quiet standing. Two main questions were addressed. Can subjects systematically chan
Publikováno v:
The Journal of physiology. 587(Pt 6)
Human balance is commonly described using linear-time-invariant (LTI) models. The feedback time delay determines the position of balance in the motor-control hierarchy. The extent of LTI control illuminates the automaticity of the control process. Us
Publikováno v:
Biological cybernetics. 101(2)
In studies of human balance, it is common to fit stimulus-response data by tuning the time-delay and gain parameters of a simple delayed feedback model. Many interpret this fitted model, a simple delayed feedback model, as evidence that predictive pr