Modulations of EEG activity in the entorhinal cortex and forebrain olfactory areas during odour sampling
作者： P.H. Boeijinga , F.H. Lopes da Silva
DOI: 10.1016/0006-8993(89)91506-0
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摘要: Abstract With the aim of determining a possible role entorhinal cortex (EC) in processing olfactory information, its electrical activity was recorded during different types odour sampling behaviour. The EC spontaneous field potentials (EEGs) were related to those simultaneously from more rostrally lying bulb (OB) and prepiriform (PPC), using coherence functions. values are measures coupling between two neuronal populations. Auto- spectra characterized by peak s-band (35–36 Hz) another 16–20 Hz band. For s-peak PPC-EC it shown that both maximal median frequency decrease first trial two-choice discrimination task. These transients differed significantly for CS+ CS− trials. However, no such difference observed exploratory sniffing at same pair odorants. It concluded degree with PPC depends on behavioural context but not quality As regards components shown, bispectral analysis, these represent 1/2 subharmonic s-components. enhanced initiation sniffing. This means neural networks OB, have non-linear dynamic properties. show modes oscillatory behaviour, characteristic restful state active state. Theoretical implications experimental results discussed. In conclusion, demonstrated modulations behaviour present s-EEG their subharmonics brain areas including EC. indicates latter is involved processes evaluation cues relation tothe animal's
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