Factors Governing Single-Trial Contextual Fear Conditioning in the Weanling Rat.

Although contextual fear conditioning emerges later in development than explicit-cue fear conditioning, little is known about the stimulus parameters and biological substrates required at early ages. The authors adapted methods for investigating hippocampus function in adult rodents to identify dete...

Descripción completa

Detalles Bibliográficos
Publicado en:Behavioral Neuroscience Vol. 123; no. 5; pp. 1148 - 1153
Autores principales: Burman, M. A., Murawski, N. J., Schiffino, F. L.
Formato: Artículo
Publicado: American Psychological Association October 2009
Materias:
Acceso en línea:Ver este registro en EBSCOhost
fields @attributes:
  recordID: 1
pdfLink:
plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=506936167&site=ehost-live
header:
  @attributes:
    shortDbName: ssf
    uiTerm: 506936167
    longDbName: Social Sciences Full Text (H.W. Wilson)
    uiTag: AN
  controlInfo:
    bkinfo:
    jinfo:
      jid:
        07357044
        BEN
      jtl: Behavioral Neuroscience
      issn: 07357044
      maglogo: N
    pubinfo:
      dt: October 2009
      vid: 123
      iid: 5
      pid: 34
      pub: American Psychological Association
    artinfo:
      ui:
        506936167
        10.1037/a0016733
      ppf: 1148
      ppct: 5
      formats:
      tig:
        atl: Factors Governing Single-Trial Contextual Fear Conditioning in the Weanling Rat.
      aug:
        au:
          Burman, M. A.
          Murawski, N. J.
          Schiffino, F. L.
      su:
        Fear
        Conditioned response
        Brain function localization
        Hippocampus (Brain)
      sug:
        subj:
          Fear
          Conditioned response
          Brain function localization
          Hippocampus (Brain)
      ab: Although contextual fear conditioning emerges later in development than explicit-cue fear conditioning, little is known about the stimulus parameters and biological substrates required at early ages. The authors adapted methods for investigating hippocampus function in adult rodents to identify determinants of contextual fear conditioning in developing rats. Experiment 1 examined the duration of exposure required by weanling rats at postnatal day (PND) 23 to demonstrate contextual fear conditioning. This experiment demonstrated that 30 s of context exposure is sufficient to support conditioning. Furthermore, preexposure enhanced conditioning to an immediate footshock, the context preexposure facilitation effect (CPFE), but had no effect on contextual conditioning to a delayed shock. Experiment 2 demonstrated that N-methyl-D-aspartate (NMDA) receptor inactivation during preexposure impairs contextual learning at PND 23. Thus, the conjuctive representations underlying the CPFE are NMDA-dependent as early as PND23 in the rat. Reprinted by permission of the publisher.
      pubtype: Academic Journal
      doctype: Article
      src: R
    language: English
    refInfo:
    copyright:
      @attributes:
        flag: N
    holdings:
      @attributes:
        islocal: N