The contribution of frequency-specific activity to hierarchical information processing in the human auditory cortex.
The contribution of frequency-specific activity to hierarchical information processing in the human auditory cortex.
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DOI：
10.1038/ncomms5694
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发表时间：
2014-09-02
影响因子：
16.6
通讯作者：
Giraud, Anne-Lise
中科院分区：
文献类型：
--
作者：
Fontolan, L.;Morillon, B.;Liegeois-Chauvel, C.;Giraud, Anne-Lise
感官信息的前馈和自上而下的传播使用不同的频段，这一事实是一个吸引人的假设，证据仍然很少。在这里，我们从两个半球的两个听觉皮质区域获得人类深度记录，同时受试者听句子，并显示信息使用不同的频率通道在每个方向上传播。自下而上和自上而下的传播分别在γ和δ-β(<；40 Hz)频段占主导地位。通过跨区域频率耦合证实了低频在自上而下信息传递中的优势，这表明A1中γ活动的功率受到从关联听觉皮质采集的δ-β活动时相的调制。这种跨地区的耦合效应在相反的方向上是不存在的。最后，我们证明了信息传递不是连续进行的，而是在自下而上或自上而下交替进行的时间窗口中进行的。这些发现表明，大脑同时使用频分和时分多路传输来优化定向信息传输。感觉处理依赖于大脑皮层层次结构中的信息传递。使用癫痫患者听口语时获得的神经活动的深度记录，作者表明，上行和下行信息通过不同的神经频率在大脑皮层区域之间传播。
The fact that feed-forward and top-down propagation of sensory information use distinct frequency bands is an appealing assumption for which evidence remains scarce. Here we obtain human depth recordings from two auditory cortical regions in both hemispheres, while subjects listen to sentences, and show that information travels in each direction using separate frequency channels. Bottom-up and top-down propagation dominates in γ- and δ–β (<40 Hz) bands, respectively. The predominance of low frequencies for top-down information transfer is confirmed by cross-regional frequency coupling, which indicates that the power of γ-activity in A1 is modulated by the phase of δ–β activity sampled from association auditory cortex (AAC). This cross-regional coupling effect is absent in the opposite direction. Finally, we show that information transfer does not proceed continuously but by time windows where bottom-up or top-down processing alternatively dominates. These findings suggest that the brain uses both frequency- and time-division multiplexing to optimize directional information transfer. Sensory processing relies on information transfer in cortical hierarchies. Using depth recordings of neural activity obtained while individuals with epilepsy listen to spoken sentences, the authors show that ascending and descending information is propagated between cortical regions through distinct neural frequencies.
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影响因子：
16.2
作者：
Bosman CA;Schoffelen JM;Brunet N;Oostenveld R;Bastos AM;Womelsdorf T;Rubehn B;Stieglitz T;De Weerd P;Fries P
通讯作者：
Fries P
影响因子：
16.2
作者：
Bastos AM;Usrey WM;Adams RA;Mangun GR;Fries P;Friston KJ
通讯作者：
Friston KJ
DOI：
10.1073/pnas.1011284108
发表时间：
2011-07-05
影响因子：
11.1
作者：
Buffalo, Elizabeth A.;Fries, Pascal;Desimone, Robert
通讯作者：
Desimone, Robert
细胞外田地和电流的起源-EEG，ECOG，LFP和尖峰。
DOI：
10.1038/nrn3241
发表时间：
2012-05-18
期刊：
Nature reviews. Neuroscience
影响因子：
--
作者：
Buzsáki G;Anastassiou CA;Koch C
通讯作者：
Koch C
DOI：
10.1073/pnas.0308538101
发表时间：
2004-06-29
影响因子：
11.1
作者：
Brovelli, A;Ding, MZ;Bressler, SL
通讯作者：
Bressler, SL