 |
|||||
|
|||||
|
|||||
|
|||||
|
|||||
The Journal of Neuroscience, July 28, 2004, 24(30):6755-6759; doi:10.1523/JNEUROSCI.0345-04.2004
Previous Article | Next Article
BRIEF COMMUNICATION
Dominance Hierarchy Influences Adult Neurogenesis in the Dentate Gyrus
Yevgenia Kozorovitskiy andElizabeth Gould Department of Psychology, Princeton University, Princeton, New Jersey 08544
Many mammalian species form dominance hierarchies, but it remains unknown whether differences in social status correspond to structural differences in the brain. Stressful experiences may arise naturally during the establishment of dominance, and stress has been linked to adult neurogenesis in the hippocampus. To determine whether position in a dominance hierarchy leads to changes in adult neurogenesis in the hippocampus, we examined the brains of rats housed in a visible burrow system (VBS), a seminaturalistic environment with opportunities for social interaction. Dominance hierarchies emerged among the males in all colonies within 3 d of living in the VBS. Although cell proliferation in the dentate gyrus did not differ between the groups, more new neurons were observed in the dentate gyrus of the dominant males compared with both subordinates and controls. Dominant and subordinate animals showed similar basal, stress, and recovery from stress levels of corticosterone, as well as similar thymus, adrenal gland, and body weights, suggesting that variables other than stress are responsible for the observed changes in adult neurogenesis. The differences in brain structure persisted among the animals that had no access to the burrow system after the dominance hierarchy stabilized, suggesting that social status rather than living in a complex environment accounts for the effect of dominance on adult neurogenesis.
Key words: neurogenesis; dentate gyrus; hippocampus; dominance; visible burrow system; aggression
Received Jan 30, 2004; revised June 5, 2004; accepted June 10, 2004.
This article has been cited by other articles:
R. F. Oliveira
Social behavior in context: Hormonal modulation of behavioral plasticity and social competence
Integr. Comp. Biol., October 1, 2009; 49(4): 423 - 440.
[Abstract] [Full Text] [PDF]
K. Ghosal, M. Gupta, and K. A. Killian
Agonistic behavior enhances adult neurogenesis in male Acheta domesticus crickets
J. Exp. Biol., July 1, 2009; 212(13): 2045 - 2056.
[Abstract] [Full Text] [PDF]
O. Evuarherhe, J. D. Leggett, E. J. Waite, Y. M. Kershaw, H. C. Atkinson, and S. L. Lightman
Organizational role for pubertal androgens on adult hypothalamic-pituitary-adrenal sensitivity to testosterone in the male rat
J. Physiol., June 15, 2009; 587(12): 2977 - 2985.
[Abstract] [Full Text] [PDF]
C. Voigt, S. Leitner, and M. Gahr
Socially induced brain differentiation in a cooperatively breeding songbird
Proc R Soc B, November 7, 2007; 274(1626): 2645 - 2652.
[Abstract] [Full Text] [PDF]
B. Leuner, Y. Kozorovitskiy, C. G. Gross, and E. Gould
Diminished adult neurogenesis in the marmoset brain precedes old age
PNAS, October 23, 2007; 104(43): 17169 - 17173.
[Abstract] [Full Text] [PDF]
C.-K. Song, L. M. Johnstone, M. Schmidt, C. D. Derby, and D. H. Edwards
Social domination increases neuronal survival in the brain of juvenile crayfish Procambarus clarkii
J. Exp. Biol., April 15, 2007; 210(8): 1311 - 1324.
[Abstract] [Full Text] [PDF]
R. M. Thomas, G. Hotsenpiller, and D. A. Peterson
Acute Psychosocial Stress Reduces Cell Survival in Adult Hippocampal Neurogenesis without Altering Proliferation
J. Neurosci., March 14, 2007; 27(11): 2734 - 2743.
[Abstract] [Full Text] [PDF]
R. M. Sapolsky
The Influence of Social Hierarchy on Primate Health
Science, April 29, 2005; 308(5722): 648 - 652.
[Abstract] [Full Text] [PDF]
|
|
|
|
 |
|