Nicolelis M A, Ghazanfar A A, Stambaugh C R, Oliveira L M, Laubach M, Chapin J K, Nelson R J, Kaas J H
Dept. of Neurobiology, Duke University Medical Center, Durham, North Carolina 27710, USA.
Nat Neurosci. 1998 Nov;1(7):621-30. doi: 10.1038/2855.
We used simultaneous multi-site neural ensemble recordings to investigate the representation of tactile information in three areas of the primate somatosensory cortex (areas 3b, SII and 2). Small neural ensembles (30-40 neurons) of broadly tuned somatosensory neurons were able to identify correctly the location of a single tactile stimulus on a single trial, almost simultaneously. Furthermore, each of these cortical areas could use different combinations of encoding strategies, such as mean firing rate (areas 3b and 2) or temporal patterns of ensemble firing (area SII), to represent the location of a tactile stimulus. Based on these results, we propose that ensembles of broadly tuned neurons, located in three distinct areas of the primate somatosensory cortex, obtain information about the location of a tactile stimulus almost concurrently.
我们使用同步多部位神经集群记录来研究灵长类动物体感皮层三个区域（3b区、第二体感区和2区）中触觉信息的表征。具有广泛调谐的体感神经元的小型神经集群（30 - 40个神经元）能够在单次试验中几乎同时正确识别单个触觉刺激的位置。此外，这些皮层区域中的每一个都可以使用不同的编码策略组合，例如平均放电率（3b区和2区）或集群放电的时间模式（第二体感区），来表征触觉刺激的位置。基于这些结果，我们提出，位于灵长类动物体感皮层三个不同区域的广泛调谐神经元集群几乎同时获取有关触觉刺激位置的信息。
