Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

The Behavioural State During Climax (Hatching) in the Domestic Fowl (Gallus Domesticus)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Behaviour

In the last decade it has been proposed that climax behaviour (CB or hatching) in the chick, Gallus domesticus, occurred during episodes of paradoxical sleep (PS). In recent experiments, however, eye opening, a sign of wakefulness, was seen during CB. The present study was designed to decide whether CB is related to PS or wakefulness. Behavioural and polygraphic criteria were employed, and drugs (melatonin and amphetamine) were administered. Melatonin suppressed wakefulness, hatching and PS, but the reappearance of PS did not coincide with that of CB. Amphetamine suppressed PS, but, except for a short period of ataxia, it did not inhibit CB. Lowering of ambient temperature stimulated wakefulness without interfering with CB. Whereas hatching is characterized by vigorous movements, only weak movements could be detected during PS. In view of these findings, it is concluded that CB is related to wakefulness and not to PS. Reports on mammals also indicate that strong movements seen during early stages of development, are not related to PS.

Affiliations: 1: Netherlands Institute for Brain Research, Amsterdam, The Netherlands


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Behaviour — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation