WFRF:(Stuart J)
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- Jankowska, ElzbietaGothenburg University,Göteborgs universitet,Fysiologiska institutionen,Department of Physiology (author)
A long propriospinal system with direct effect on motoneurones and on interneurones in the cat lumbosacral cord
- Article/chapterEnglish1974
Publisher, publication year, extent ...
- 1974
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- LIBRIS-ID:oai:gup.ub.gu.se/288726
- https://gup.ub.gu.se/publication/288726URI
- https://doi.org/10.1007/BF00234388DOI
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- Language:English
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Notes
- Stimulation of the lateral funicle was performed at different segmenta levels in the cat in order to investigate the connecxions of long propriospinal neurones with ipsilateral lumbosacral motoneurones and interneurones projecting directly to them. In one series of experiments the propriospinal contribution was assessed from the difference between the effect of maximal stimulation in C 1 (activating supraspinal descending fibres) and in more caudal segments (activating supraspinal and propriospinal fibres). In another series on cats with chronic hemisection in C 3 pure propriospinal effects were evoked by stimulation of the thoracic spinal cord. In both series it was shown that volleys in long propriospinal neurones evoke monosynaptic EPSPs and disynaptic EPSP and/or IPSP in many flexor and extensor motoneurones; an extracellular monosynaptic focal synaptic potential was recorded in lamina VII of Rexed. The effects evoked by stimulation of the Th 11 segment after chronic C 3 hemisection were not found after chronic Th 10 hemisection. It is therefore tentatively suggested that they were due to stimulation of long descending propriospinal neurones originating in the lower cervical and upper thoracic segments, their axon trajectory being in the middle of the lateral funiculus and conduct at velocity 100 m/sec. Other effects evoked by stimulation of Th 11 after chronic Th 10 hemisection are ascribed to antidromic activation of axons of ascending neurones. © 1974 Springer-Verlag.
Subject headings and genre
- MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper hsv//swe
- MEDICAL AND HEALTH SCIENCES Basic Medicine hsv//eng
- Lumbosacral motoneurones
- Propriospinal neurones
- Spinal cord
- Stimulation
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- Lundberg, AndersGothenburg University,Göteborgs universitet,Fysiologiska institutionen,Department of Physiology (author)
- Roberts, W. J. (author)
- Stuart, D. (author)
- Göteborgs universitetFysiologiska institutionen (creator_code:org_t)
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- In:Experimental Brain Research21, s. 169-1940014-48191432-1106
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