Two visual systems in one brain

Neuropils serving the principal eyes of the spider Cupiennius salei

Nicholas J Strausfeld, P. Weltzien, F. G. Barth

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

Principal (anterior median) eyes of the wandering spider Cupiennius are served by three successive neuropils, the organization of which is distinct from those serving secondary eyes. Photoreceptors terminate in the first optic neuropil amongst second order neurons with overlapping dendritic fields. Second order neurons terminate at various depths in anterior median eye medulla where they are visited by bush-like dendritic trees of third order projection neurons. These supply tracts which extend into the 'central body.' This crescent-shaped neuropil lies midsagittally in the rear of the brain near its dorsal surface. It is organized into columns and it supplies both columnar and tangential efferents to other brain centers. The supply to and organization of the 'central body' neuropil is reminiscent of retinotopic neuropils supplying the lobula of insects. Channels to the 'central body' comprise one of two concurrent visual pathways, the other provided by the secondary eyes supplying the 'mushroom body.' We suggest that principal eye pathways may be involved in form and texture perception whereas secondary eyes detect motion, as is known for jumping spiders. Our data do not support Hanstrom's classical view that the 'central body' is specifically associated with web-building, nor that it is homologous to its namesake in insect brains.

Original languageEnglish (US)
Pages (from-to)63-75
Number of pages13
JournalJournal of Comparative Neurology
Volume328
Issue number1
DOIs
StatePublished - 1993

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Spiders
Neuropil
Brain
Neurons
Insects
Form Perception
Mushroom Bodies
Visual Pathways

Keywords

  • 'central body'
  • arachnids
  • concurrent processing
  • Cupiennius salei
  • principal eyes
  • visual system

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Two visual systems in one brain : Neuropils serving the principal eyes of the spider Cupiennius salei. / Strausfeld, Nicholas J; Weltzien, P.; Barth, F. G.

In: Journal of Comparative Neurology, Vol. 328, No. 1, 1993, p. 63-75.

Research output: Contribution to journalArticle

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