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Recurrent inhibition from motor axon collaterals of transmission in the Ia inhibitory pathway to motoneurones

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Hultborn, H., Jankowska, Elẓbieta, Lindström, S.·1971·The Journal of Physiology

Abstract

1. The effects of impulses in recurrent motor axon collaterals on reflex transmission from different types of primary afferents to motoneurones were investigated in the cat by conditioning of PSPs evoked in motoneurones. 2. IPSPs evoked by volleys in large muscle spindle (Ia) afferents were effectively decreased when preceded by an antidromic stimulation of ventral roots. Some IPSPs from group II muscle afferents and low threshold cutaneous afferents were also slightly depressed, while other PSPs were unaffected. 3. The depression of the IPSPs could be evoked by antidromic volleys, which produced neither conductance changes in the motoneurones nor depolarization of Ia afferent terminals. 4. The effect on the Ia IPSPs is most likely due to post‐synaptic inhibition of the Ia inhibitory interneurones, evoked through α‐motor axon collaterals and Renshaw cells. The depression of some IPSPs from flexor reflex afferents is explained by a convergence of excitatory effects from these afferents on the Ia inhibitory interneurones. 5. The results indicate a selective recurrent control from motor axon collaterals of the interneurones in the reciprocal Ia inhibitory pathway to motoneurones.

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Metadata

Authors
Hultborn, H., Jankowska, E., & Lindström, S.
Venue
The Journal of Physiology
Publisher
Wiley
Published
1971-07
Volume
215
Issue
3
Pages
591-612
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W1981030777
Cited by
291
References
0
FWCI
5.16
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Recurrent inhibition from motor axon collaterals of transmission in the Ia inhibitory pathway to motoneurones. https://app.cochat.ai/papers/10.1113/jphysiol.1971.sp009487
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Hultborn, H., Jankowska, E., & Lindström, S. (1971). Recurrent inhibition from motor axon collaterals of transmission in the Ia inhibitory pathway to motoneurones. The Journal of Physiology. https://doi.org/10.1113/jphysiol.1971.sp009487

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.