[Temporal phase complementarity between the lateral geniculate neurons sharing a common receptive field].
Bi-unit recordings were sometimes obtained in the lateral geniculate nucleus of cat with a single microelectrode. The neuron pairs consisted of an on-center and an off-center cell sharing a common receptive field and both cells showed either transient or sustained responses to light stimulation. When a sinusoidally modulated light spot was presented at their receptive field center, the on-center and off-center cells responded half a cycle (approximately 180 degrees) out of phase with one another at all intensities tested. At a low temporal frequency (5 Hz), peak responses occurred in response to the maximum (in on-center cells) or minimum (in off-center cells) luminances of light modulation with an identical delay. The complementary phase property makes the cell couple work in a "push-pull" manner and enables transient cells, which show half-cycle rectification as they work alone, to transmit modulated light signals of complete cycle.
Shanghai Institute of Physiology, Chinese Academy of Sciences.
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D000818:Animals; D002415:Cats; D004594:Electrophysiology; D005829:Geniculate Bodies / Q000502:physiology*; D008839:Microelectrodes; D009474:Neurons / Q000502:physiology; D010775:Photic Stimulation; D012815:Signal Processing, Computer-Assisted