IMMUNOREACTIVITY OF THE SYNAPSES ON THE PRIMARY AFFERENT AXONS AND SENSORY NEURONS OF THE SPINAL CORD
LAMPETRA FLUVIATILIS
V. O. Adanina,1 J.-P. Rio,2 A. S. Adanina,1 J. Reperan,2 N. P. Vesselkin 1
1 I. M. Sechenov Institute of Evolutionary Physiology and Biochemistry RAS, St. Petersburg, Russia, and
2 Laboratoire d'Anatomie compare, Museum National d'Histoire Naturelle, Paris, France;
e-mail: Adanina@rambler.ru
The existence of GABA-like immunoreactivity in the synapses on the primary afferent axons and GABA-and glutamate immunoreactive synapses on the dorsal
cell somatic membrane was shown using double postem-bedding immunogold cytochemistry. These morphological findings suggest that control of the sensory
information in the lamprey spinal cord is realized by means of presynaptic inhibition through the synapses on the primary afferent axons as well as directly through
the synapses on the somata of the sensory neurons.
Key words: afferents, sensory neurons, GABA- and glutamate immunoreactive synapses, spinal cord, Lampetra fluviatilis
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