Human cortico-hippocampal activity related to auditory discrimination revealed by neuromagnetic field

Neuroreport
Y KikuchiT Takeda

Abstract

We carried out multi-dipole estimation and pursued spatio-temporal brain activity on a time scale of several milliseconds during an auditory discrimination task using a whole-cortex type SQUID system. Neuronal activities were estimated in the medial (hippocampus, parahippocampal gyrus, etc.) and lateral temporal cortices (superior and middle temporal gyri, etc.), the dorsolateral prefrontal cortex (middle and inferior frontal gyri, etc.) and the parietal cortex (supramarginal gyrus, etc.) in the 280-400 ms latency range. The activity in the posterior hippocampal region was the most prominent and long-lasting in parallel with the activities in the other regions. Therefore, the posterior hippocampal region is a central structure engaged in auditory discrimination. The whole-cortex neuromagnetic measurements provided the possibility of imaging the time-varying activities of the human cortico-hippocampal neural networks.

References

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Citations

Aug 23, 2001·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Y HamadaR Suzuki
Sep 29, 2005·Behavioral Neuroscience·Faith M HanlonJose M Cañive
Oct 3, 1998·Applied Human Science : Journal of Physiological Anthropology·Y Kikuchi
Aug 26, 2010·Psychophysiology·Terrance J WilliamsCindy M Yee
Oct 17, 2003·Neuroreport·Faith M HanlonJose M Cañive

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