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Experimental Brain Research

, Volume 81, Issue 1, pp 77–84 | Cite as

Correlation between retinal afferent distribution, neuronal size, and functional activity in the guinea pig medial terminal accessory optic nucleus

  • F. Lui
  • G. P. Biral
  • C. Benassi
  • R. Ferrari
  • R. Corazza
Article

Summary

The intrinsic morpho-functional organization of the medial terminal nucleus of the accessory optic system was investigated in the guinea pig. The distribution of the retinal afferents, as assessed by the axoplasmic transport of 14C-valine, showed a remarkable asymmetry within the nucleus. Thus, while the retinal terminal field covered the entire medial terminal nucleus, by far the largest density of labeled retinofugal axon terminals was found within its dorsal division. In this same portion of the nucleus, we found the greatest density of large cells and the maximum intensity of functional activation, this latter as estimated by the increase in metabolic activity of neurons using the 14C-2-deoxyglucose autoradiographie method in the vertical and horizontal whole-field movement in the visual field.

Key words

Accessory optic system Medial terminal nucleus Autoradiography Functional metabolism Neuron classes Vertical optokinetic nystagmus Guinea pig 

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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • F. Lui
    • 1
  • G. P. Biral
    • 1
  • C. Benassi
    • 1
  • R. Ferrari
    • 1
  • R. Corazza
    • 1
  1. 1.Istituto di Fisiologia UmanaUniversità di ModenaModenaItaly

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