[Alpha- and beta-oscillations of dynamics of the area and weight of receptive fields of cat striate neurons under conditions of classical and combined mapping].
In 22 acute experiments in anesthetized and immobilized adult cats the dynamics of 83 receptive fields (RF) of 47 striate neurons was studied by temporal slices method. Classical mapping revealed wave-like changes in the area and weight of neuronal RFs. Special mathematical analysis showed that such changes represented a sum of a slow non-oscillatory and comparatively fast components. The slow component was a biphasic up and down RF dynamics. In most cases, the oscillation frequencies were within the alpha- and beta- EEG frequency ranges. When the RF center was activated additionally during combined mapping, the oscillations frequencies remained unchanged, but the duration and amplitude of non-oscillatory component substantially decreased. Mechanisms underlying the RF dynamics and its functional significance are discussed.
N A
NA
Lazareva
S A
SA
Kozhukhov
R V
RV
Novikova
A S
AS
Tikhomirov
D Iu
DIu
Tsutskiridze
G A
GA
Sharaev
D000513:Alpha Rhythm / Q000502:physiology*; D000818:Animals; D001611:Beta Rhythm / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods*; D002415:Cats; D004569:Electroencephalography; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology; D055351:Retinal Neurons / Q000502:physiology*; D014793:Visual Cortex / Q000166:cytology / Q000502:physiology*