Distinct α- and β-band rhythms over rat somatosensory cortex with similar properties as in humans
| Autor: | Freek van Ede, George Dimitriadis, Eric Maris, Anne M.M. Fransen |
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| Rok vydání: | 2016 |
| Předmět: |
Male
Neuroinformatics 0301 basic medicine Periodicity Physiology Action Potentials Stimulus (physiology) Biologische psychologie Somatosensory system 03 medical and health sciences 0302 clinical medicine Physical Stimulation medicine Animals Humans Rats Long-Evans Beta Rhythm Electrodes Electrocorticography Brain Mapping Sensory stimulation therapy Fourier Analysis medicine.diagnostic_test Action intention and motor control General Neuroscience 160 000 Neuronal Oscillations Somatosensory Cortex Plasticity and Memory [DI-BCB_DCC_Theme 3] Barrel cortex Rats Alpha Rhythm 030104 developmental biology Sensorimotor rhythm Touch Call for Papers Biological psychology Female Primary motor cortex Psychology Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Journal of Neurophysiology, 115, 6, pp. 3030-3044 Journal of Neurophysiology, 115, 3030-3044 |
| ISSN: | 1522-1598 0022-3077 3030-3044 |
| Popis: | We demonstrate distinct α- (7–14 Hz) and β-band (15–30 Hz) rhythms in rat somatosensory cortex in vivo using epidural electrocorticography recordings. Moreover, we show in rats that a genuine β-rhythm coexists alongside β-activity that reflects the second harmonic of the arch-shaped somatosensory α-rhythm. This demonstration of a genuine somatosensory β-rhythm depends on a novel quantification of neuronal oscillations that is based on their rhythmic nature: lagged coherence. Using lagged coherence, we provide two lines of evidence that this somatosensory β-rhythm is distinct from the second harmonic of the arch-shaped α-rhythm. The first is based on the rhythms' spatial properties: the α- and β-rhythms are demonstrated to have significantly different topographies. The second is based on the rhythms' temporal properties: the lagged phase-phase coupling between the α- and β-rhythms is demonstrated to be significantly less than would be expected if both reflected a single underlying nonsinusoidal rhythm. Finally, we demonstrate that 1) the lagged coherence spectrum is consistent between signals from rat and human somatosensory cortex; and 2) a tactile stimulus has the same effect on the somatosensory α- and β-rhythms in both rats and humans, namely suppressing them. Thus we not only provide evidence for the existence of genuine α- and β-rhythms in rat somatosensory cortex, but also for their homology to the primate sensorimotor α- and β-rhythms. |
| Databáze: | OpenAIRE |
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