scholarly journals Heterogeneity of contraction-induced effects in neurons of the cat dorsal spinocerebellar tract.

1995 ◽  
Vol 487 (3) ◽  
pp. 761-772 ◽  
Author(s):  
D Zytnicki ◽  
J Lafleur ◽  
N Kouchtir ◽  
J F Perrier
Keyword(s):  
Spinocerebellar Tract

Components of responses of a population of DSCT neurons to muscle stretch and contraction

1989 ◽  
Vol 61 (2) ◽  
pp. 456-465 ◽  
Author(s):  
C. E. Osborn ◽  
R. E. Poppele
Keyword(s):  
Time Course ◽  
Functional Organization ◽  
Afferent Fiber ◽  
Response Probability ◽  
Principal Component ◽  
Response Patterns ◽  
Afferent Pathways ◽  
Hindlimb Muscles ◽  
Spinocerebellar Tract ◽  
And Cluster Analysis

1. Impulse activity of 264 units of the dorsal spinocerebellar tract (DSCT) was recorded during random contraction or stretch in hindlimb muscles. Contractions were evoked in either the isolated gastrocnemius-soleus (GS) muscles or the intact limb during crossed-extensor reflexes; stretches were applied to the isolated GS. 2. The time course of poststimulus changes in spike activity of DSCT neurons was determined from the response probability function (RPF; Ref. 15). These data were analyzed using principal component and cluster analysis to group the responses according to the RPF waveforms. 3. The responses to each type of stimulus displayed a remarkable similarity in time course, regardless of the type of stimulus used. The responses were also similar to those observed previously during single shock nerve stimulation (14). 4. The most reasonable explanation for these results is that the time course of excitability changes in DSCT neurons is determined less by particular types of receptors or patterns of afferent fiber activity than by the circuitry and afferent pathways impinging on the neurons of the DSCT. 5. The functional organization of DSCT suggested by these results includes a wide divergence from sensory receptors along polysynaptic pathways to DSCT neurons and considerable convergence onto each neuron from a diversity of receptors. Individual DSCT cells may respond to stimuli with one of a few stereo-typical response patterns yet the distribution of those patterns among the units of the DSCT population may be unique for each stimulus.

Evoked potentials elicited on the cerebellar cortex by electrical stimulation of the rat spinocerebellar tract

2009 ◽  
Vol 72 (4) ◽  
pp. 395-400 ◽  
Author(s):  
Hiroyuki Muramatsu ◽  
Kyouichi Suzuki ◽  
Tatsuya Sasaki ◽  
Masato Matsumoto ◽  
Jun Sakuma ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Evoked Potentials ◽  
Cerebellar Cortex ◽  
Spinocerebellar Tract ◽  
Stimulation Of

scholarly journals Molecular Logic of Spinocerebellar Tract Neuron Diversity and Connectivity

Cell Reports ◽  
2019 ◽  
Vol 27 (9) ◽  
pp. 2620-2635.e4 ◽  
Author(s):  
Myungin Baek ◽  
Vilas Menon ◽  
Thomas M. Jessell ◽  
Adam W. Hantman ◽  
Jeremy S. Dasen
Keyword(s):  
Molecular Logic ◽  
Spinocerebellar Tract ◽  
Neuron Diversity

scholarly journals Lateropulsion Due to a Lesion of the Dorsal Spinocerebellar Tract

2005 ◽  
Vol 44 (12) ◽  
pp. 1295-1297 ◽  
Author(s):  
Kengo MAEDA ◽  
Michiko SAIKYO ◽  
Atsushi MUKOSE ◽  
Hirotaka TOMIMATSU ◽  
Hitoshi YASUDA
Keyword(s):  
Spinocerebellar Tract

Microelectrode study of dorsal spinocerebellar tract

1962 ◽  
Vol 203 (5) ◽  
pp. 799-802 ◽  
Author(s):  
S. T. Kitai ◽  
F. Morin
Keyword(s):  
Hind Limb ◽  
Sensory Modality ◽  
The Body ◽  
Joint Movement ◽  
Ipsilateral Side ◽  
Sensory Modalities ◽  
Spinocerebellar Tract ◽  
Stimulation Of

The dorsal spinocerebellar tract (DSCT) at C-1, C-2, and the lower medulla level was studied with microelectrodes in lightly anesthetized cats. All responses were obtained from the stimulation of the ipsilateral side of the body. The sensory modalities activating the total of 242 fibers studied were touch (53%), pressure (31%), touch and pressure (2%), and joint movement (14%). Responses to touch were more numerous for the forelimb, while responses to pressure and to joint movement were more numerous for the hind limb. Regardless of modalities the trunk was significantly less represented in the DSCT than the limbs. Tactile and pressure peripheral fields were restricted (i.e., a few hairs of a paw) and large (i.e., more than one segment of a limb). The ratio of restricted to large fields for touch was 7 to 1, and for pressure 5 to 1. Fibers activated by joint movements adjusted their frequency of firing to the degree of displacement and to the rate of the movement. There was no evidence for a separate anatomical segregation of fibers responding to a single sensory modality.

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