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- W1998991614 abstract "Action potentials from 152 cells of the lateral reticular nucleus (LRN) were extracellularly recorded following stimulation of the anterior sigmoid gyrus of both cerebral hemispheres in cats anesthetized with α-chloralose. A single cortical stimulus elicited activity in 84.2% of the cells. Responses to stimulation of both motor cortices were elicited in 64.5% of the population. In view of the number of cells activated from both motor cortices the LRN may function as a connecting link between both sensorimotor cortices and the cerebellum. Experiments involving ablation of the contralateral pericruciate cortex and sectioning of the contralateral half of the spinal cord at the cervical level did not alter cell responses to stimulation of the ipsilateral motor cortex. Thus it appears that activation of LRN cells from ipsilateral motor cortex is not entirely dependent on these structures. Of the cells activated by stimulation of the ipsilateral motor cortex 35.3% had mean initial spike latencies less than 7.0 msec. This would indicate that direct connections between the ipsilateral motor cortex and the LRN may be greater than is indicated by anatomical studies. Since 41.5% of all cells responsive to cortical stimulation could be activated by peripheral stimulation and 44.7% of all cells antidromically fired by paramedian stimulation belonged to this group of cells, this would indicate that peripherally elicited activity may reach neocerebellum via the LRN. Inhibition of peripheral activity by cortical stimulation was most frequently encountered when there was interaction between motor cortex stimulation and stimulation of the periphery. The modifying effect exerted on peripheral activiby by stimulation of one motor cortex was always the same as that exerted by stimulating its contralateral homologue. In all instances the conditioning cortical stimulus which inhibited peripheral activity also elicited a response. Thus the site of inhibition may be outside the nucleus or alternatively cortical stimulation may have a dual influence on some LRN cells." @default.
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- W1998991614 date "1971-08-01" @default.
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- W1998991614 title "Influence of sensorimotor cortices on lateral reticular nucleus cells" @default.
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- W1998991614 doi "https://doi.org/10.1016/0014-4886(71)90062-8" @default.
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