Journal of comparative physiology

, Volume 143, Issue 4, pp 477–483 | Cite as

Efferent neural control in the eyes of orb weaving spiders

  • Shigeki Yamashita
  • Hideki Tateda


Efferent spikes have been recorded from the optic nerves of the orb weaving spiders,Argiope bruennichii andA. amoena. The frequency of efferent spikes in the optic nerve indicates a diurnal periodicity which is maintained in constant darkness. Increased efferent spikes in the optic nerve have two distinct effects on the eyes' responses to light stimulation. Resting potentials of the photoreceptor cells are rapidly hyperpolarized by increased efferent discharges. At the same time their saturated photoreceptor potential amplitude increases. These quick changes are directly mediated by the efferent axons. In addition, increased efferent spike rates more slowly augment the receptor cells' sensitivity to light stimulation, i.e. lower their thresholds.


Optic Nerve Receptor Cell Distinct Effect Photoreceptor Cell Neural Control 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



(eyes) anterior median eyes


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Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • Shigeki Yamashita
    • 1
  • Hideki Tateda
    • 1
  1. 1.Department of Biology, Faculty of ScienceKyushu University 33FukuokaJapan

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