The time course of minimal excitory post-synaptic potentials evoked in spinal motoneurones by group Ia afferent fibres.

1. Group Ia EPSPs were recorded from lumbosacral motoneurones in anaesthetized cats after almost complete section of the relevant dorsal roots. The EPSPs were usually of small amplitude (median value of 230 μV) and an averaging device was used to improve the definition of their time course.

[1]  R E Burke,et al.  Group Ia synaptic input to fast and slow twitch motor units of cat triceps surae , 1968, The Journal of physiology.

[2]  J. Jack,et al.  An electrical description of the motoneurone, and its application to the analysis of synaptic potentials , 1971, The Journal of physiology.

[3]  J. Eccles.  Membrane time constants of cat motoneurons and time courses of synptic action. , 1961, Experimental neurology.

[4]  M. Ito,et al.  Electrical behaviour of the motoneurone membrane during intracellularly applied current steps. , 1965, The Journal of physiology.

[5]  W. Rall.  Distinguishing theoretical synaptic potentials computed for different soma-dendritic distributions of synaptic input. , 1967, Journal of neurophysiology.

[6]  M. Kuno,et al.  Analysis of synaptic efficacy in spinal motoneurones from ‘quantum’ aspects , 1969, The Journal of physiology.

[7]  W Rall,et al.  Dendritic location of synapses and possible mechanisms for the monosynaptic EPSP in motoneurons. , 1967, Journal of neurophysiology.

[8]  E Henneman,et al.  Terminals of Single Ia Fibers: Distribution within a Pool of 300 Homonymous Motor Neurons , 1968, Science.

[9]  R. Eisenberg,et al.  The Spatial Variation of Membrane Potential Near a Small Source of Current in a Spherical Cell , 1970, The Journal of general physiology.

[10]  Wilfrid Rall,et al.  Theoretical significance of dendritic trees for neuronal input-output relations , 1964 .

[11]  L. Illis.  The relative densities of monosynaptic pathways to the cell bodies and dendrites of the cat ventral horn. , 1967, Journal of the neurological sciences.

[12]  P. Nelson,et al.  Some electrical measurements of motoneuron parameters. , 1970, Biophysical journal.

[13]  M. Kuno.  Quantal components of excitatory synaptic potentials in spinal motoneurones , 1964, The Journal of physiology.

[14]  P. Sterling,et al.  Anatomical organization of the brachial spinal cord of the cat. II. The motoneuron plexus. , 1967, Brain research.

[15]  J. Eccles,et al.  The time courses of excitatory and inhibitory synaptic actions , 1959, The Journal of physiology.

[16]  J J Jack,et al.  The propagation of transient potentials in some linear cable structures , 1971, The Journal of physiology.

[17]  P. Sterling,et al.  Anatomical organization of the brachial spinal cord of the cat. I. The distribution of dorsal root fibers. , 1967, Brain research.

[18]  W. Rall.  Branching dendritic trees and motoneuron membrane resistivity. , 1959, Experimental neurology.