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July 1, 1976Journal of Neurophysiology

Individual EPSPs produced by single triceps surae Ia afferent fibers in homonymous and heteronymous motoneurons

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Population

Cat triceps surae (MG, LG, SOL) motoneurons and Ia afferent fibers

Comparison

Action of single Ia afferent fibers vs Homonymous vs heteronymous motoneurons; SOL vs…

Design

Preclinical

Authors

JSJ. G. ScottLMLorne M. MendellStony Brook University

Discussion

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Implication

Does not inform human motor control; leaves open whether muscle-specific Ia EPSP patterns translate beyond this animal model.

Structured PICO

P
Population
Cat triceps surae (MG, LG, SOL) motoneurons and Ia afferent fibers
I
Intervention
Action of single Ia afferent fibers
C
Comparator
Homonymous vs heteronymous motoneurons; SOL vs MG vs LG motoneurons and afferent fibers
O
Outcome
EPSP amplitude and rise timesurrogate

EPSPs evoked by single Ia afferent fibers differ in amplitude and rise time depending on the specific muscle and whether the projection is homonymous or heteronymous, suggesting both location and species specificity.

Limitations

  • Possible difficulties introduced by the limited resolution of the averaging technique

Cite This Study

Scott et al. (1976) studied this question.

synapsesocial.com/papers/6a86fb0636c36f97809ec9b9https://doi.org/10.1152/jn.1976.39.4.679
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Relative strength of synaptic input from short-latency pathways to motor units of defined type in cat medial gastrocnemius1976 · 257 citations
  2. 2Relative contribution from different nerves to recurrent depression of Ia IPSPs in motoneurones1971 · 223 citations
  3. 3Shared reflex pathways from Ib tendon organ afferents and Ia muscle spindle afferents in the cat.1983 · 127 citations
  4. 4Physiological and histochemical characteristics of motor units in cat tibialis anterior and extensor digitorum longus muscles1980 · 114 citations
  5. 5Exercise-induced plasticity of Ia proprioceptive input to spinal motoneurons2026