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Hormones and social behavioral development: Influences of corticosterone in the neonate rat

Harmon, Kelley Marie
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1287769254

Abstract Details

2010, Doctor of Philosophy (Ph.D.), Bowling Green State University, Psychology/Experimental.
Exposure to prenatal stress (PNS) has been shown to induce a set of psychological and behavioral changes in the developing offspring. The rat model was used to investigate whether PNS and/or pharmacological corticosterone manipulations produce changes in the ability of the pup to express social motivation. The first experiment was designed to replicate previous work on PNS and extend the investigation on socially-mediated behaviors. The second experiment attempts to replicate the findings of Experiment 1 by mimicking PNS behaviors through direct corticosterone administration. Finally, the third Experiment was designed to investigate whether the effects of PNS could be ameliorated by administration of the drug metyrapone. The measures used to assess socially-mediated behaviors are 1) separation vocalizations, 2) conditioned odor preference, 3) conditioned odor aversion, and 4) anesthetized dam approach and duration of contact. Results of the first experiment did not replicate those of previous studies (Harmon et al., 2009). Experiment 2 found that direct corticosterone administration is not able to mimic both the physiological and behavioral deficits observed in the PNS model. The third experiment demonstrated that metyrapone was not able to restore the socially-mediated behaviors in PNS rats. These findings indicate that PNS has a much more dynamic impact on rat pup physiology than just elevations in corticosterone. Additionally, attempts to lower corticosterone in PNS pups via administration of metyrapone aren’t sufficient to restore atypical behaviors in PNS rats.This dissertation has implications for the treatment of psychological disorders, like autism spectrum disorder, involving disruptions in learning and social behaviors and raises concerns using elevated corticosterone levels as a model for PNS deficits.
Casey Cromwell, PhD (Advisor)
Huber Robert, PhD (Committee Member)
Meserve Lee, PhD (Committee Member)
Musher-Eizenman Dara, PhD (Committee Member)
198 p.
Psychology
corticosterone; prenatal stress; rat; social behaviors; motivation; attachment

Recommended Citations

Citations

  • Harmon, K. M. (2010). Hormones and social behavioral development: Influences of corticosterone in the neonate rat [Doctoral dissertation, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1287769254

    APA Style (7th edition)

  • Harmon, Kelley. Hormones and social behavioral development: Influences of corticosterone in the neonate rat. 2010. Bowling Green State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1287769254.

    MLA Style (8th edition)

  • Harmon, Kelley. "Hormones and social behavioral development: Influences of corticosterone in the neonate rat." Doctoral dissertation, Bowling Green State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1287769254

    Chicago Manual of Style (17th edition)

bgsu1287769254
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© 2010, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.