scholarly journals Is the medial amygdala part of the neural circuit modulating conditioned defeat in Syrian hamsters?

2008 ◽  
Vol 15 (1) ◽  
pp. 6-12 ◽  
Author(s):  
C. M. Markham ◽  
K. L. Huhman
Keyword(s):  
Neural Circuit ◽  
Medial Amygdala ◽  
Syrian Hamsters ◽  
Conditioned Defeat

scholarly journals Role of amygdala and hippocampus in the neural circuit subserving conditioned defeat in Syrian hamsters

2010 ◽  
Vol 17 (2) ◽  
pp. 109-116 ◽  
Author(s):  
C. M. Markham ◽  
S. L. Taylor ◽  
K. L. Huhman
Keyword(s):  
Neural Circuit ◽  
Syrian Hamsters ◽  
Conditioned Defeat

Conditioned defeat in male and female syrian hamsters

2003 ◽  
Vol 44 (3) ◽  
pp. 293-299 ◽  
Author(s):  
Kim L Huhman ◽  
Matia B Solomon ◽  
Marcus Janicki ◽  
Alvin C Harmon ◽  
Stacie M Lin ◽  
...  
Keyword(s):  
Male And Female ◽  
Syrian Hamsters ◽  
Conditioned Defeat

scholarly journals Gonadal hormones modulate the display of conditioned defeat in male Syrian hamsters

2009 ◽  
Vol 56 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Matia B. Solomon ◽  
Mary C. Karom ◽  
Alisa Norvelle ◽  
Chris A. Markham ◽  
W. Daniel Erwin ◽  
...  
Keyword(s):  
Gonadal Hormones ◽  
Syrian Hamsters ◽  
Conditioned Defeat

scholarly journals Testosterone Programs Adult Social Behavior before and during, But Not after, Adolescence

Endocrinology ◽  
2009 ◽  
Vol 150 (8) ◽  
pp. 3690-3698 ◽  
Author(s):  
Kalynn M. Schulz ◽  
Julia L. Zehr ◽  
Kaliris Y. Salas-Ramirez ◽  
Cheryl L. Sisk
Keyword(s):  
Social Behavior ◽  
Mating Behavior ◽  
Reproductive Behavior ◽  
Neural Circuit ◽  
Pubertal Development ◽  
Ventromedial Hypothalamus ◽  
Gonadal Hormones ◽  
Medial Amygdala ◽  
Steroid Dependent ◽  
Juvenile Males

Whereas the adolescent brain is a major target for gonadal hormones, our understanding of hormonal influences on adolescent neural and behavioral development remains limited. These experiments investigated how variations in the timing of testosterone (T) exposure, relative to adolescence, alters the strength of steroid-sensitive neural circuits underlying social behavior in male Syrian hamsters. Experiment 1 simulated early, on-time, and late pubertal development by gonadectomizing males on postnatal d 10 and treating with SILASTIC brand T implants for 19 d before, during, or after adolescence. T treatment before or during, but not after, adolescence facilitated mating behavior in adulthood. In addition, preadolescent T treatments most effectively increased mating behavior overall, indicating that the timing of exposure to pubertal hormones contributes to individual differences in adult behavior. Experiment 2 examined the effects of preadolescent T treatment on behavior and brain regional volumes within the mating neural circuit of juvenile males (i.e. still preadolescent). Although preadolescent T treatment did not induce reproductive behavior in juvenile males, it did increase volumes of the bed nucleus of the stria terminalis, sexually dimorphic nucleus, posterodorsal medial amygdala, and posteroventral medial amygdala to adult-typical size. In contrast, juvenile anterodorsal medial amygdala and ventromedial hypothalamus volumes were not changed by preadolescent T treatment yet differed significantly in volume from adult controls, suggesting that further maturation of these brain regions during adolescence is required for the expression of male reproductive behavior. Thus, adolescent maturation of social behavior may involve both steroid-independent and -dependent processes, and adolescence marks the end of a postnatal period of sensitivity to steroid-dependent organization of the brain.

Sex and estrous cycle differences in the display of conditioned defeat in Syrian hamsters

2007 ◽  
Vol 52 (2) ◽  
pp. 211-219 ◽  
Author(s):  
Matia B. Solomon ◽  
Mary C. Karom ◽  
Kim L. Huhman
Keyword(s):  
Estrous Cycle ◽  
Syrian Hamsters ◽  
Conditioned Defeat
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