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The Origin of a Descending Pathway with Monosynaptic Action on Flexor Motoneurones
Abstract
The postsynaptic effects evoked in lumbar motoneurones were studied following electrical stimulation of the brain stem in the cat. The spinal cord was transected at the lower thoracic level leaving only the ipsilateral ventral quadrant intact. With a stereotactical method a low threshold focus was found in the medial brain stem from which monosynaptic EPSPs could be evoked in flexor motoneurones. It is concluded that this effect is mediated by fibres descending in the ipsilateral medial longitudinal fascicle and it is tentatively suggested that these fibres originate from the ipsilateral upper medullary or lower pontine reticular formation. Monosynaptic EPSPs were also evoked in some extensor motoneurones from this medial brain stem region and at such a strength of stimulation that stimulus escape to the lateral vestibulospinal tract is excluded.
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Citations
Cited by
Jones, B. E., & Yang, T. (1985) · Journal of Comparative Neurology · doi:10.1002/cne.902420105 · Cited by 896
Anatomy of the Descending Pathways
Kuypers, H. G. J. M. (1981) · Comprehensive Physiology · doi:10.1002/cphy.cp010213 · Cited by 640
Current principles of motor control, with special reference to vertebrate locomotion
Grillner, S., & El Manira, A. (2020) · Physiological Reviews · doi:10.1152/physrev.00015.2019 · Cited by 560
Self-citationThe acoustic startle reflex: neurons and connections
Yeomans, J. S., & Frankland, P. W. (1995) · Brain Research Reviews · doi:10.1016/0165-0173(96)00004-5 · Cited by 462
Burke, R. E., & Rudomin, P. (1977) · Comprehensive Physiology · doi:10.1002/cphy.cp010124 · Cited by 276
Metadata
- Authors
- Grillner, S., & Lund, S.
- Venue
- Acta Physiologica Scandinavica
- Publisher
- Wiley
- Published
- 1968-11
- Volume
- 74
- Issue
- 3
- Pages
- 274-284
- ISSN
- 0001-6772 (ISSN-L)
- 1365-201X
- OpenAlex
- W2155905812
- Cited by
- 175
- References
- 0
- FWCI
- 8.35
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: The Origin of a Descending Pathway with Monosynaptic Action on Flexor Motoneurones. https://app.cochat.ai/papers/10.1111/j.1365-201x.1968.tb10921.x
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- Grillner, S., & Lund, S. (1968). The Origin of a Descending Pathway with Monosynaptic Action on Flexor Motoneurones. Acta Physiologica Scandinavica. https://doi.org/10.1111/j.1365-201x.1968.tb10921.x
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