Species-specific calls evoke asymmetric activity in the monkey's temporal poles

摘要: It has often been proposed that the vocal calls of monkeys are precursors human speech, in part because they provide critical information to other members species who rely on them for survival and social interactions1,2. Both behavioural lesion studies suggest monkeys, like humans, use auditory system left hemisphere preferentially process vocalizations3,4. To investigate pattern neural activity might underlie this particular form functional asymmetry we measured local cerebral metabolic while animals listened passively species-specific compared with a variety classes sound. Within superior temporal gyrus, significantly greater occurred side than right, only region pole response monkey calls. This was absent when these regions were separated by forebrain commissurotomy, suggesting perception vocalizations elicits concurrent interhemispheric interactions focus processing within specialized area one hemisphere.