Deutscher Anke, Kurt Simone, Scheich Henning, Schulze Holger
Leibniz Institute for Neurobiology, Magdeburg, Germany.
Neuroreport. 2006 Jun 26;17(9):853-6. doi: 10.1097/01.wnr.0000221837.20255.62.
It is commonly assumed that different perceptual qualities arising from sensory stimuli depend on their physical nature being transformed by specific peripheral receptors, for example, colour, vibration or heat. A notable unexplained exception is the low and high repetition rates of any sound perceived as rhythm or pitch, respectively. Using auditory discrimination learning in bilaterally auditory cortex ablated animals, we demonstrate that the perceptual quality of sounds depends on the way the brain processes stimuli rather than on their physical nature. In this context, cortical and subcortical processing steps have different roles in analysing different aspects of sounds with the complete analysis accomplished not before information converges in the auditory cortex.
人们通常认为，感觉刺激产生的不同感知特性取决于其物理性质被特定外周感受器转换，例如颜色、振动或热。一个显著的未得到解释的例外是，任何分别被感知为节奏或音高的声音的低重复率和高重复率。通过在双侧听觉皮层被切除的动物中进行听觉辨别学习，我们证明声音的感知特性取决于大脑处理刺激的方式，而非其物理性质。在这种情况下，皮层和皮层下处理步骤在分析声音的不同方面具有不同作用，完整的分析直到信息在听觉皮层汇聚才得以完成。
