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The relationship between magnetic and electrophysiological responses to complex tactile stimuli |
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| Authors: | Zhao Zhu Johanna M Zumer Marianne E Lowenthal Jeff Padberg Gregg H Recanzone Leah A Krubitzer Srikantan S Nagarajan and Elizabeth A Disbrow |
| Institution: | (1) Biomagnetic Imaging Laboratory, Department of Radiology, University of California,San Francisco, 94143-0628 San Francisco, CA, USA;(2) Center for Neuroscience, University of California, Davis, 95616 Davis, CA, USA;(3) Section of Neurobiology, Physiology & Behavior, University of California, Davis, 95616 Davis, CA, USA;(4) Department of Psychology, University of California, Davis, 95616 Davis, CA, USA;(5) Department of Neurology, University of California, Davis, 95616 Davis, CA, USA |
| Abstract: | BackgroundMagnetoencephalography (MEG) has become an increasingly popular technique for non-invasively characterizing neuromagnetic field changes in the brain at a high temporal resolution. To examine the reliability of the MEG signal, we compared magnetic and electrophysiological responses to complex natural stimuli from the same animals. We examined changes in neuromagnetic fields, local field potentials (LFP) and multi-unit activity (MUA) in macaque monkey primary somatosensory cortex that were induced by varying the rate of mechanical stimulation. Stimuli were applied to the fingertips with three inter-stimulus intervals (ISIs): 0.33s, 1s and 2s. |
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