How local is the local field potential?
How local is the local field potential?
复制标题
DOI:
10.1016/j.neuron.2011.09.029
复制
发表时间:
2011-12-08
期刊:
影响因子:
16.2
通讯作者:
Schroeder CE
中科院分区:
文献类型:
--
作者:
Kajikawa Y;Schroeder CE
Local field potentials (LFPs) are of growing importance in neurophysiological investigations. LFPs supplement action potential recordings by indexing activity relevant to EEG, MEG and hemodynamic (fMRI) signals. Recent reports suggest that LFPs reflect activity within very small domains of several hundred microns. We examined this conclusion by comparing LFP, current source density (CSD), and multiunit activity (MUA) signals in macaque auditory cortex. Estimated by frequency tuning bandwidths, these signals' “listening areas” differ systematically with an order of: MUA < CSD < LFP. Computational analyses confirm that observed LFPs receive non-local contributions. Direct measurements indicate passive spread of LFPs to sites more than a centimeter from their origins. These findings appear to be independent of the frequency content of the LFP. Our results challenge the idea that LFP recordings typically integrate over extremely circumscribed local domains. Rather, LFPs appear as a mixture of local potentials with “volume conducted” potentials from distant sites.
登录
查看更多内容
影响因子:
2.9
作者:
AREZZO, J;PICKOFF, A;VAUGHAN, HG
通讯作者:
VAUGHAN, HG
影响因子:
56.9
作者:
Galambos, R
通讯作者:
Galambos, R
影响因子:
4.3
作者:
Ingber, Lester;Nunez, Paul L.
通讯作者:
Nunez, Paul L.
影响因子:
2.5
作者:
Kaur, S;Lazar, R;Metherate, R
通讯作者:
Metherate, R
影响因子:
3.7
作者:
Ince NF;Gupta R;Arica S;Tewfik AH;Ashe J;Pellizzer G
通讯作者:
Pellizzer G