PHYSIOLOGICAL CORRELATES & NEURAL MECHANISMS OF THE INFANT CRY & VOCALIZATION

这个项目已经开始探索内生性与 松鼠猴的激素水平和发声行为。在一项研究中， 皮质醇和睾丸素水平都与 成年雄鸟发出警报声。然而，研究发现两者之间的相关性很弱。 成年女性皮质醇水平与报警呼叫率之间存在相关性。 研究发现，被阉割的雄性具有更低的反应阈值和更陡峭的反应 剂量-反应(以报警呼叫率为反应指标) 防御性威胁反应的行为药理学模型。 被阉割的雄性在发声行为上也与完整的雄性不同 同性社交互动。去势使更多的人在推特上 而完好无损的雄性会更多地发出错误的声音和窥视。前者 呼叫类型与友好交互相关联，而后者 与兴奋和唤醒联系在一起。新的成像方法 脑组织切片被启动，成年男性的大脑 和雌性松鼠猴(一种性别差异很大的物种 行为)被检查了大小的数量差异 前脑区域。

This project has begun to explore the association between endogenous hormone levels and vocal behavior in the squirrel monkey. In one study, neither cortisol nor testosterone levels correlated with production of alarm calls in adult males. However, a weak correlation was found to exist between cortisol levels and alarm calling rate in adult females. Castrated males were found to have a lower response threshold and steeper dose-response (using rate of alarm calling as the response measure) in a behavioral pharmacology model for defensive threat reactivity. Castrated males also differed from intact males in vocal behavior during same-sex social interactions. The castrates made more twitters and chucks, while intact males made more err chucks and peeps. The former call types are associated with friendly interactions, while the latter are associated with excitement and arousal. New methodology for imaging histological brain sections were initiated, and the brains of adult male and female squirrel monkeys (a species with robust sex differences in behavior) were examined for quantitative differences in the size of forebrain areas.