کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6025635 1580898 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Correlates of a single cortical action potential in the epidural EEG
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
پیش نمایش صفحه اول مقاله
Correlates of a single cortical action potential in the epidural EEG
چکیده انگلیسی
To identify the correlates of a single cortical action potential in surface EEG, we recorded simultaneously epidural EEG and single-unit activity in the primary somatosensory cortex of awake macaque monkeys. By averaging over EEG segments coincident with more than hundred thousand single spikes, we found short-lived (≈ 0.5 ms) triphasic EEG deflections dominated by high-frequency components > 800 Hz. The peak-to-peak amplitude of the grand-averaged spike correlate was 80 nV, which matched theoretical predictions, while single-neuron amplitudes ranged from 12 to 966 nV. Combining these estimates with post-stimulus-time histograms of single-unit responses to median-nerve stimulation allowed us to predict the shape of the evoked epidural EEG response and to estimate the number of contributing neurons. These findings establish spiking activity of cortical neurons as a primary building block of high-frequency epidural EEG, which thus can serve as a quantitative macroscopic marker of neuronal spikes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Brought to you by:GAYATRI VIDYA PARISHAD COLLEGE OF ENGINEERING for Women Renewal due by 31 Dec 2017
نویسندگان
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