Predicting Impaired Extinction of Traumatic Memory and Elevated Startle
Author Information
Author(s): Nalloor Rebecca, Bunting Kristopher, Vazdarjanova Almira
Primary Institution: Georgia Health Sciences University
Hypothesis
Can individual predispositions to a PTSD-like phenotype be identified before experiencing emotional trauma?
Conclusion
Individual predispositions to developing impaired extinction and elevated acoustic startle can be identified after exposure to a mild stressor.
Supporting Evidence
- Rats classified as susceptible showed higher levels of freezing behavior after fear conditioning.
- Only 1% of rats met susceptibility criteria before exposure to the mild stressor, compared to 14% after.
- Susceptible rats had lasting elevated startle responses after the traumatic event.
Takeaway
Some rats can be predicted to have problems with fear and startle responses after a scary event, but only if they first experience a little stress.
Methodology
Rats were exposed to a mild stressor and then tested for anxiety-like behavior and acoustic startle responses to classify them as susceptible or resistant to PTSD-like symptoms.
Potential Biases
Potential bias in classification based on behavioral responses could affect the results.
Limitations
The study primarily used male rats, which may limit the generalizability of the findings to other populations.
Participant Demographics
Young adult male Sprague-Dawley rats.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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