Postnatal development of the hippocampus in the Rhesus macaque (Macaca mulatta): A longitudinal magnetic resonance imaging study
Article first published online: 1 APR 2014
© 2014 Wiley Periodicals, Inc.
Volume 24, Issue 7, pages 794–807, July 2014
How to Cite
Hunsaker, M. R., Scott, J. A., Bauman, M. D., Schumann, C. M. and Amaral, D. G. (2014), Postnatal development of the hippocampus in the Rhesus macaque (Macaca mulatta): A longitudinal magnetic resonance imaging study. Hippocampus, 24: 794–807. doi: 10.1002/hipo.22271
- Issue published online: 19 JUN 2014
- Article first published online: 1 APR 2014
- Accepted manuscript online: 20 MAR 2014 01:28AM EST
- Manuscript Accepted: 12 MAR 2014
- NIH. Grant Numbers: R01 NS016980, R37 MH57502
- Rhesus macaque;
- magnetic resonance imaging;
- longitudinal development;
- primate model
Nonhuman primates are widely used models to investigate the neural substrates of human behavior, including the development of higher cognitive and affective function. Due to their neuroanatomical and behavioral homologies with humans, the rhesus macaque monkey (Macaca mulatta) provides an excellent animal model in which to characterize the maturation of brain structures from birth through adulthood and into senescence. To evaluate hippocampal development in rhesus macaques, structural magnetic resonance imaging scans were obtained longitudinally at 9 time points between 1 week and 260 weeks (5 years) of age on 24 rhesus macaque monkeys (12 males, 12 females). In our sample, the hippocampus reaches 50% of its adult volume by 13 weeks of age and reaches an adult volume by 52 weeks in both males and females. The hippocampus appears to be slightly larger at 3 years than at 5 years of age. Male rhesus macaques have larger hippocampi than females from 8 weeks onward by approximately 5%. Interestingly, there was increased variability in hemispheric asymmetry for hippocampus volumes at younger ages than at later ages. These data provide a comprehensive evaluation of the longitudinal development of male and female rhesus macaque hippocampus across development from 1 week to 5 years of age. © 2014 Wiley Periodicals, Inc.