Action of static and dynamic fusimotor fibres on secondary endings of cat's spindles

Appelberg, B.; Bessou, P; Laporte, Y

doi:10.1113/jphysiol.1966.sp007978

Cited by 104 publications

(50 citation statements)

References 12 publications

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“…dynamic types of fusimotor fibres described by P. B. C. Matthews (1962) were found. The effects of stimulation of the one dynamic fusimotor fibre and one of the static fusimotor fibres on the spindle afferent response to stretch was the same as those described for the cat by other authors (P. B. C. Matthews, 1962;Crowe & Matthews, 1964;Appelberg, Bessou & Laporte, 1966).…”

Section: Resultssupporting

confidence: 59%

The response to stretch of muscle spindle afferents of baboon's tibialis anticus and the effect of fusimotor stimulation

Koeze¹

1968

The Journal of Physiology

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SUMMARY1. Systematic studies of the response of baboon's tibialis anticus muscle spindles to stretch were undertaken. Most of the spindle afferents studied had conduction velocities between 72 and 78 m/sec with a range from 39 to 93 m/sec. There was no clear bimodality in the histogram of the conduction velocity. Measurements were made of the axon diameters of the nerve to tibialis anticus. The largest number of the larger axons had diameters from 11 to 13 It. The largest axon diameter measured 17 ,t and there were very few of these.2. The dynamic index for any given afferent tended to be greater for the more rapidly conducting afferents and lower for the more slowly conducting afferents. However, a statistically significant regression line of this relationship could only be drawn for a stretch velocity of 64 mm/sec.3. The spindle afferent response to stretch was studied from different muscle lengths. It was found that the velocity sensitive portion of the response to phasic stretch decreased when the stretch extended up to or beyond the maximum physiological length of the muscle.4. Dynamic and static fusimotor fibres were isolated. The response of the spindle afferent to stretch, while the dynamic fusimotor fibre was being stimulated, was the same as that reported for the cat by P. B. C. Matthews (1962). During static fusimotor stimulation the response of the spindle afferent to stretch was usually like that reported for the cat. In a single case, however, static fusimotor stimulation resulted in a lowering of the peak frequency of the response of the spindle afferent to the phasic portion of stretch.

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Section: Resultssupporting

confidence: 59%

The response to stretch of muscle spindle afferents of baboon's tibialis anticus and the effect of fusimotor stimulation

Koeze¹

1968

The Journal of Physiology

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“…In general, cell size correlates positively with conduction velocity, so sensory modalities associated with fast Aαβ conduction velocities are likely mediated by neurons with large cell bodies, whereas slowly conducting Aδ-and C-fibers are associated with small cells. Physiological data indicate that proprioceptors and many mechanoreceptors have fast A-fibers (Angel and Alston 1964;Appelberg et al 1966;Knibestöl 1973), as do the large light populations of DRG neurons (Lawson and Waddell 1991). This leads to the inference that these neurons have large cell bodies.…”

Section: Classifying Drg Neurons Based On Cell Sizementioning

confidence: 99%

Morphological and functional diversity of first-order somatosensory neurons

2017

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First-order somatosensory neurons transduce and convey information about the external or internal environment of the body to the central nervous system. They are pseudo unipolar neurons with cell bodies residing in one of several ganglia located near the central nervous system, with the short branch of the axon connecting to the spinal cord or the brain stem and the long branch extending towards the peripheral organ they innervate. Besides their sensory transducer and conductive role, somatosensory neurons also have trophic functions in the tissue they innervate and participate in local reflexes in the periphery. The cell bodies of these neurons are remarkably diverse in terms of size, molecular constitution, and electrophysiological properties. These parameters have provided criteria for classification that have proved useful to establish and study their functions. In this review, we discuss ways to measure and classify populations of neurons based on their size and action potential firing pattern. We also discuss attempts to relate the different populations to specific sensory modalities.

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“…The purpose of this paper is to describe some simulations of a linear lumped-parameter mechanical model of the muscle spindle as a neurally controlled transducer of stretch and discuss the requirements such a model places on the mechanisms of control. To do this, we shall first summarize the various types of responses to the various types of inputs that have been described by numerous previous investigators [15,16,17,18].…”

confidence: 99%

A muscle spindle model and study the effects of static and dynamic γ stimulations on primary and secondary ending outputs

Golpayegani¹

2009

JBiSE

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Action of static and dynamic fusimotor fibres on secondary endings of cat's spindles

Cited by 104 publications

References 12 publications

The response to stretch of muscle spindle afferents of baboon's tibialis anticus and the effect of fusimotor stimulation

The response to stretch of muscle spindle afferents of baboon's tibialis anticus and the effect of fusimotor stimulation

Morphological and functional diversity of first-order somatosensory neurons

A muscle spindle model and study the effects of static and dynamic γ stimulations on primary and secondary ending outputs

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