These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Synaptic ribbons in the pineal organ of the goldfish: circadian rhythmicity and the effects of constant light and constant darkness.
    Author: McNulty JA.
    Journal: Cell Tissue Res; 1981; 215(3):491-7. PubMed ID: 7214490.
    Abstract:
    Synaptic ribbons in photoreceptor cells of the goldfish pineal organ undergo significant daily changes in their length, distance from the plasma membrane, and number per unit area of pineal end-vesicle. The rhythms persist in fish exposed to constant darkness. Constant light abolishes the rhythms in length and distance of synaptic ribbons from the plasmalemma, but has little effect on numerical changes over a 24-h cycle. These findings suggest that synaptic ribbons in the pineal organ of lower vertebrates might be useful as indicators of metabolic activity.
    [Abstract] [Full Text] [Related] [New Search]