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Development of the monosynaptic stretch reflex circuit
Current Opinion in Neurobiology, 2003Significant advances have been made during the past few years in our understanding of how the spinal monosynaptic reflex develops. Transcription factors in the Neurogenin, Runt, ETS, and LIM families control sequential steps of the specification of various subtypes of dorsal root ganglia sensory neurons. The initiation of muscle spindle differentiation
Chen, H. -H. +3 more
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Phasic stretch reflex of the abdominal muscles
Experimental Neurology, 1986This analysis of the abdominal stretch reflex (ASR) evoked by a tap to the abdomen was designed to explore how abdominal motoneurons process signals from respiratory and nonrespiratory sources. We recorded surface EMGs from the external and internal oblique muscles in standing subjects. Amplitudes of the abdominal stretch reflex varied despite constant
T, Kondo, B, Bishop, C F, Shaw
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Adaptive plasticity in the spinal stretch reflex
Brain Research, 1983Monkeys can change the amplitude of the spinal stretch reflex without change in initial alpha motor neuron tone, as measured by EMG, or in initial muscle length. Change is apparent in 5-10 days, continues to develop over weeks, and persists during inactive periods.
J R, Wolpaw +4 more
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Stretch reflexes in human abdominal muscles
Experimental Brain Research, 2004Homonymous and heteronymous reflex connections of the abdominal muscles were investigated by the application of a tap to the muscle belly and observation of surface electromyographic responses. Reflex responses of the following abdominal muscles were investigated both ipsilateral and contralateral to the tap: rectus abdominis (RA), external oblique (EO)
Beith, I D, Harrison, P J
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Voluntary modulation of human stretch reflexes
Experimental Brain Research, 2007It has been postulated that the central nervous system (CNS) can tune the mechanical behavior of a joint by altering reflex stiffness in a task-dependant manner. However, most of the evidence supporting this hypothesis has come from the analysis of H-reflexes or electromyogram (EMG) responses.
Daniel, Ludvig +2 more
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Diurnal rhythm in the spinal stretch reflex
Brain Research, 1982We studied primate spinal stretch reflex (SSR) amplitude as a function of time of day. SSR amplitude was greatest around midnight and smallest around noon. The diurnal rhythm was not simply a function of number of trials, or of the lighting cycle. This rhythm offers an opportunity to study the neuronal and synaptic mechanisms producing a diurnal change
J R, Wolpaw, R F, Seegal
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Spinal mechanisms of the functional stretch reflex
Experimental Brain Research, 1978A sudden and rapid angular displacement of the limb evokes, in human and monkey subjects, a segmented pattern of electromyographic activity in muscles which are stretched. While the first segment is acknowledged to represent a tendon jerk, it has been proposed that the second segment, occurring with a shorter latency than a reaction time, is mediated ...
C, Ghez, Y, Shinoda
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Nonlinear identification of stretch reflex dynamics
Annals of Biomedical Engineering, 1988The objective of this study was to use nonlinear identification techniques to study the dynamics of stretch reflexes in the human calf muscles (gastrocnemius-soleus). Stochastic perturbations of ankle position were applied while subjects maintained a constant, tonic contraction of gastrocnemius-soleus.
R E, Kearney, I W, Hunter
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1998
Let us examine the lowest motor control level for which the neural structure is delimited by the major identified neurons of the spinal cord (i.e., α- and γ-motoneurons, Ia interneurons, and Renshaw cells) and by extrafusal and intrafusal muscle fibers.
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Let us examine the lowest motor control level for which the neural structure is delimited by the major identified neurons of the spinal cord (i.e., α- and γ-motoneurons, Ia interneurons, and Renshaw cells) and by extrafusal and intrafusal muscle fibers.
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The human stretch reflex and the motor cortex
Trends in Neurosciences, 1991The spinal stretch reflex, exemplified by the tendon jerk, appears to be less important in humans than a delayed 'long-latency' response. This is easily observed when muscles of the hand are stretched while they are already contracting voluntarily. On limited evidence, many have long held that the delayed response is a transcortical reflex and have ...
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