Smulders T V, Sasson A D, DeVoogd T J
Department of Psychology, Cornell University, Ithaca, New York, USA.
J Neurobiol. 1995 May;27(1):15-25. doi: 10.1002/neu.480270103.
Black-capped chickadees (Parus atricapillus) in upstate New York show a peak in food-hoarding intensity in October. We caught chickadees at six different times of the year and measured the volume of several brain structures. We found that the hippocampal formation, which is involved in spatial memory for cached food items, has a larger volume, relative to the rest of the brain, in October than at any other time of the year. We conclude that there is an association between the intensity of food hoarding and the volume of the hippocampal formation and suggest that the enhanced anatomy might be caused by the increased use of spatial memory.
纽约州北部的黑顶山雀（Parus atricapillus）在10月份的食物储存强度达到峰值。我们在一年中的六个不同时间捕捉山雀，并测量了几个脑结构的体积。我们发现，参与储存食物空间记忆的海马结构，相对于大脑其他部分，在10月份的体积比一年中的任何其他时间都要大。我们得出结论，食物储存强度与海马结构的体积之间存在关联，并表明这种增强的结构可能是由于空间记忆使用增加所致。
