LEFT-HEMISPHERE DOMINANCE FOR PROCESSING VOCALIZATIONS IN ADULT, BUT NOT INFANT, RHESUS-MONKEYS - FIELD EXPERIMENTS
LEFT-HEMISPHERE DOMINANCE FOR PROCESSING VOCALIZATIONS IN ADULT, BUT NOT INFANT, RHESUS-MONKEYS - FIELD EXPERIMENTS
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DOI：
10.1073/pnas.91.9.3946
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发表时间：
1994-04-26
影响因子：
11.1
通讯作者：
ANDERSSON, K
中科院分区：
文献类型：
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作者：
HAUSER, MD;ANDERSSON, K
在人类中，大脑的左半球主要负责处理语言。为了评估这种神经心理机制的进化起源，在大量自由放养的恒河猴（Macaca mulatta）身上进行了回放实验。回放提供了一个平等的机会，使右耳或左耳朝向扬声器。结果表明，80只成年恒河猴中有61只在听到自己的声音时偏爱右耳（左半球），而在听到异源声音时偏爱左耳。相比之下，一岁以下的婴儿对同种或异种呼叫没有表现出知觉不对称。因此，像人类一样，成年恒河猴也证明左半球支配处理特定物种的发声。然而，这种不对称的出现可能取决于两个半球的不同成熟程度和对物种典型声乐曲目的体验。
In humans, the left hemisphere of the brain is dominant for processing language. To assess the evolutionary origins of this neuropsychological mechanism, playback experiments were conducted on a large population of free-ranging rhesus monkeys (Macaca mulatta). Playbacks provided an equal opportunity to orient the right or left ear toward the speaker. Results revealed that 61 of 80 adult rhesus favored the right ear (left hemisphere) when vocalizations from their own repertoire were heard but favored the left ear when listening to heterospecific vocalizations. In contrast, infants less than a year old showed no perceptual asymmetry for conspecific or heterospecific calls. Thus, like humans, adult rhesus monkeys also evidence left hemisphere dominance for processing species-specific vocalizations. The emergence of such asymmetry, however, may depend on both differential maturation of the two hemispheres and experience with the species-typical vocal repertoire.