Abstract
Paw lick, tail flick, and other nociceptive reaction latencies were observed in rats to be longer in the evening than in the daytime, suggesting an endogenous opiate mediated decrease in pain sensitivity in the evening in comparison with the daytime.
Original language | English (US) |
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Pages (from-to) | 419-420 |
Number of pages | 2 |
Journal | Physiology and Behavior |
Volume | 23 |
Issue number | 2 |
DOIs | |
State | Published - Aug 1979 |
Funding
This study was supported by NIH Grant GM-23696 to J. P. Rosenfeld.
Keywords
- Diurnal
- Endorphin
- Enkephalin
- Naloxone
- Nociception
- Pain
ASJC Scopus subject areas
- Experimental and Cognitive Psychology
- Behavioral Neuroscience