[Study of selective attention in dogs by coherent-phase characteristics of cortical potentials in the broad frequency band 1-220 Hz].
Coherent-phase characteristics of cortical potentials (1-220 Hz) derived from different cortical point of both brain hemispheres of dogs were analyzed in the state of selective attention developed in the course of instrumental food conditioning. Among the compared cortical points, functional groups were found that were probably of priority for the state of selective attention. Values of coherence function between these derivations (an assessment of temporal relations) were at a certain optimal level (about 0.7), predominantly, in the frequency ranges of 1-15 and 40-200 Hz. Under such conditions, if the average phase shifts between the potentials were near zero, phenomenon of potential synchronism was formed. In case of significant phase shifts, phenomenon of asynchronous temporal relations with a certain spatial direction developed.
Dumenko
V N
VN
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
Kozlov
M K
MK
D000818:Animals; D001288:Attention / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology*; D003214:Conditioning, Classical; D003344:Cortical Synchronization; D004285:Dogs; D004567:Electrodes, Implanted; D004594:Electrophysiology / Q000379:methods; D005071:Evoked Potentials / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted