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Properties of axons of sympathetic preganglionic neurons of the lower thoracic spinal cord

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Abstract

Sympathetic preganglionic fibers arising in spinal cord segments T7-T10. were investigated. Conduction velocity, excitability and refractory period were obtained by recording the antidromic wave in the ventral roots and the antidromic discharge in sympathetic preganglionic lateral horn neurons. Conduction along the spinal part of the axons is slower than along the peripheral. In four sympathetic preganglionic neurons inhibition of subsequent antidromic responses took place after antidromic stimulation. This suggests that axons of these neurons have recurrent collaterals.

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  1. Laboratory of Circulation Physiology Pavlov Institute of Physiology, USSR Academy of Sciences, Leningrad

    V. P. Lebedev

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  1. V. P. Lebedev
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Lebedev, V.P. Properties of axons of sympathetic preganglionic neurons of the lower thoracic spinal cord. Neurosci Behav Physiol 5, 377–384 (1972). https://doi.org/10.1007/BF01183113

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