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Related Experiment Videos

Amygdala priming results in conditioned place avoidance.

Shelley K Thielen1, Anantha Shekhar

  • 1Department of Pharmacology, University of Texas Health Sciences Center at San Antonio, San Antonio, TX, USA. ashekhar@iupui.edu

Pharmacology, Biochemistry, and Behavior
|February 7, 2002
PubMed
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Priming the rat amygdala with bicuculline methiodide (BMI) creates conditioned place avoidance. This suggests that this panic disorder model may induce phobic-like responses and avoidance behaviors.

Area of Science:

  • Neuroscience
  • Behavioral Neuroscience
  • Psychopharmacology

Background:

  • Priming, a process involving daily stimulation of the basolateral nucleus of the amygdala (BLA) with a subthreshold dose of bicuculline methiodide (BMI), models human panic disorder symptoms.
  • The BLA plays a crucial role in fear conditioning and the expression of anxiety-related behaviors.

Purpose of the Study:

  • To investigate whether the priming procedure, used to model panic attacks, induces conditioned place avoidance (CPA).
  • To determine if the context associated with BLA priming becomes aversive, mimicking secondary agoraphobia in humans.

Main Methods:

  • Male Wistar rats received daily BLA microinjections of BMI (6-pmol) or vehicle for 5 days.
  • Animals were exposed to distinct tactile floor cues (grid or hole) immediately following injections.

Related Experiment Videos

  • Conditioned place avoidance was assessed by measuring the time spent in compartments associated with BMI injections versus sham injections.

    • Main Results:

    • Rats exhibited CPA, showing a significant aversion to the floor texture paired with the BMI injection.
    • This avoidance behavior indicates that the context associated with BLA priming acquired aversive properties.

    Conclusions:

    • Daily BLA priming with a subthreshold dose of BMI induces CPA in rats.
    • These findings support the use of this priming model for studying panic disorder and associated phobic-like avoidance behaviors.