Journal ArticleDOI
The influence of different descending systems on the tonic stretch reflex in the cat
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Families of static characteristics of both extensors and flexor were preserved during selective paralysis of gamma efferents by application of novocain to the muscle nerve.About:
This article is published in Experimental Neurology.The article was published on 1972-12-01. It has received 354 citations till now. The article focuses on the topics: Muscle tension & Stretch reflex.read more
Citations
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Journal ArticleDOI
Once More on the Equilibrium-Point Hypothesis (λ Model) for Motor Control
TL;DR: The equilibrium control hypothesis (λ model) is considered with special reference to the length-force invariant characteristic of the muscle together with central and reflex systems subserving its activity.
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Amplitude modulation of the soleus H-reflex in the human during walking and standing
C Capaday,RB Stein +1 more
TL;DR: Since the reflex amplitude is task-dependent and is not always closely related to the EMG produced during a given task such as walking, the strong modulation of H-reflex during walking is not simply a passive consequence of the alpha-motoneuron excitation level.
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Predictions not commands: active inference in the motor system
TL;DR: It is shown that the anatomical substrate of this recurrent message passing is a hierarchical system consisting of functionally asymmetric driving (ascending) and modulatory (descending) connections: an arrangement that is almost exactly recapitulated in the motor system, in terms of its laminar, topographic and physiological characteristics.
Journal ArticleDOI
The origin and use of positional frames of reference in motor control
Anatol G. Feldman,Mindy F. Levin +1 more
TL;DR: The hypothesis that intentional movements are produced by shifting the frame of reference is extended to multi-muscle and multi-degrees-of-freedom systems with a solution of the redundancy problem that allows the control of a joint alone or in combination with other joints to produce any desired limb configuration and movement trajectory.
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Superposition of motor programs—I. Rhythmic forearm movements in man
TL;DR: It can be concluded that both the reciprocal and the unidirectional central commands to antagonistic motoneurones occur simultaneously, as well as a scheme of superposition, of these motor commands are discussed.
References
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Journal ArticleDOI
The effects of length and stimulus rate on tension in the isometric cat soleus muscle
P. M. H. Rack,D. R. Westbury +1 more
TL;DR: By subdividing ventral roots and supplying stimulating pulses to different groups of motor units in rotation, smooth contractions of soleus could be obtained with low rates of stimulation.
Journal ArticleDOI
Reflexes in Response to Stretch (Myotatic Reflexes)
TL;DR: In this same muscle the “knee jerk” is doubtless a reflex in response to a stretch; but it is a reaction whose brevity makes it perhaps the most twitch-like of all reflexes, whereas the reflex under consideration here is tetanic and prolonged.
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The dependence of tension upon extension in the stretch reflex of the soleus muscle of the decerebrate cat.
TL;DR: Experiments show that the 'tetanic fusion frequency' of soleus may vary with its length-a finding of importance for any'discussion of the neural control of the stretch reflex.
Journal ArticleDOI
Effects from the pyramidal tract on spinal reflex arcs.
A. Lundberg,P. Voorhoeve +1 more
TL;DR: The effect of stimulation of the sensorimotor cortex on spinal reflex arcs was investigated in cats with intracellular recording from motoneurones and with conditioning of monosynaptic reflexes and it is suggested that these actions on mot oneurones are due mainly to activation of interneurones of spinal Reflex arcs.
Related Papers (5)
Improvement in linearity and regulation of stiffness that results from actions of stretch reflex.
T. R. Nichols,James C. Houk +1 more