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: NMDA receptors modulate long-term habituation to spatial novelty: dose- and genotype-dependent differential effects of posttrial MK-801 and CPP in rats.
    Author: Pellicano MP, Siciliano F, Sadile AG.
    Journal: Physiol Behav; 1993 Sep; 54(3):563-8. PubMed ID: 8415951.
    Abstract:
    To investigate the role N-methyl-D-aspartate (NMDA) receptors play in behavioral plasticity, adult male rats of the Naples high-(NHE) and low-excitability (NLE) lines, and of a random-bred Sprague-Dawley strain (NRB) received, the noncompetitive (MK-801:0.01 or 2.5 mg/kg) or the competitive (CPP: 0.01 or 5 mg/kg) NMDA receptor antagonists, or vehicle IP soon after a 10-min test in a Làt-maze. Retention was tested 1 week later. Habituation of activity and defecation score was monitored by the between-test decrement (LTH) in the frequency of corner-crossings (HA) and rearings (VA), with prevailing cognitive and noncognitive meaning, respectively, and of fecal boli. (i) In the NLE-rats, low and high doses of MK-801 facilitate LTH of HA, and a high dose of CPP facilitates LTH of HA. (ii) In the NRB-rats, MK-801 facilitates LTH of HA at a low dose and inhibits LTH of VA at a high dose, whereas CPP inhibits LTH of HA at a high dose only. In contrast, (iii) in the NHE-rats, high doses of MK-801 impair LTH of HA, and low doses of CPP facilitate LTH of HA. In conclusion, the dose- and genotype-dependent differential effects of allosteric and isosteric receptor blockade support the hypothesized modulatory role of NMDA receptors in behavioral plasticity; and the dissociation between retention of cognitive and noncognitive behavioral components suggests that NMDA receptors are involved in their parallel processing.
    [Abstract] [Full Text] [Related] [New Search]