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. 1977 Nov;272(3):755–767. doi: 10.1113/jphysiol.1977.sp012071

Direct excitatory interactions between spinal motoneurones of the cat.

P Gogan, J P Gueritaud, G Horcholle-Bossavit, S Tyc-Dumont
PMCID: PMC1353653  PMID: 592213

Abstract

1. Ninety-seven spinal motoneurones were identified by their antidromic invasion following stimulation of the muscle nerve and submitted to a series of four tests to reveal a possible direct excitation between motoneurones. 2. Threshold differentiation, refractoriness, hyperpolarization and collision revealed antidromically induced depolarizations in fourteen of the ninety-seven tested motoneurones. 3. The parameters of the antidromically induced depolarizations indicate a short latency, a low amplitude and independence with regard to the membrane polarization. 4. It is concluded that the antidromically induced depolarizations reached the impaled motoneurone via a route other than its own axon. 5. The mechanism may involve either electrotonic interactions between neighbouring motoneurones or excitatory recurrent collaterals between synergist motoneurones.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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