Rigamonti Marco M, Spiezio Caterina, Poli Marco D, Fazio Ferruccio
Centro di Primatologia HSR, Milan, Italy.
Am J Primatol. 2005 Jan;65(1):27-38. doi: 10.1002/ajp.20095.
This research is based on the idea that some prosimian species are good models in which to test certain postulates of the "postural origins" theory proposed by MacNeilage and colleagues [Behavioral and Brain Sciences 10:247-303, 1987] to explain the evolution of hand preference within the order Primates. We investigated manual laterality in 16 wild indris (eight males and eight females, living in four social groups) in their habitat, the Madagascan tropical rain forest. Data were collected on two spontaneous behaviors: "branch-reach," an action that occurs during foraging, and "higher support," a posture typical of clingers and leapers. A total of seven subjects were significantly lateralized for branch-reach (two showed a right preference, and five showed a left preference). Four subjects were significantly lateralized for higher support, and all of them showed a right-hand preference. Most of the indris we studied showed no preference. Our research suggests that indri are at "level 1 of laterality" in the classification framework proposed by McGrew and Marchant [Yearbook of Physical Anthropology 40:201-232, 1997]. The data presented here are not discordant with the "postural origins" theory, as lateralized subjects are often in the direction predicted by MacNeilage and colleagues [Behavioral and Brain Sciences 10:247-303, 1987], but they are the minority.
本研究基于这样一种观点，即某些原猴类物种是很好的模型，可用于检验麦克尼尔奇及其同事[《行为与脑科学》10:247 - 303，1987]提出的“姿势起源”理论的某些假设，该理论旨在解释灵长目动物中手偏好的进化。我们在马达加斯加热带雨林的栖息地对16只野生大狐猴（8只雄性和8只雌性，生活在四个社会群体中）的手动偏好进行了调查。收集了关于两种自发行为的数据：“树枝抓取”，一种在觅食过程中发生的行为，以及“更高支撑”，一种典型的攀缘和跳跃姿势。共有7只大狐猴在树枝抓取行为上表现出显著的偏好（2只表现出右手偏好，5只表现出左手偏好）。4只大狐猴在更高支撑姿势上表现出显著的偏好，且均为右手偏好。我们研究的大多数大狐猴没有表现出偏好。我们的研究表明，在麦克格鲁和马钱特[《体质人类学年鉴》40:201 - 232，1997]提出的分类框架中，大狐猴处于“偏好水平1”。这里呈现的数据与“姿势起源”理论并不矛盾，因为表现出偏好的个体通常符合麦克尼尔奇及其同事[《行为与脑科学》10:247 - 303，1987]预测的方向，但它们是少数。
